Cardiovascular And Respiratory: Anatomy Quiz!

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  • 1/71 Questions
    4 main stages of respiration - ProProfs

    4 main stages of respiration

    • No
    • No
    • 1. pulmonary ventilation, 2. external respiration, 3. transport, 4. internal respiration
    • No
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About This Quiz


Do you know the cardiovascular and respiratory systems? The cardiovascular system consists of the heart and blood vessels. The heart completes the function of pumping blood vessels through the body, and blood is delivered to a different part of the body. The respiratory system's anatomy includes the nose, pharynx, larynx, trachea, bronchi, and lungs. If If the notion of an See moreexam makes your heart skip a beat, this quiz can help.

Cardiovascular And Respiratory: Anatomy Quiz! - Quiz

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  • 2. 
    Air pathway - ProProfs

    Air pathway

    • No

    • No

    • Trachea, primary bronchus, secondary bronchus, tertiary bronchus (many x's over), bronchiole, alveolui

    • No

    • No

    Correct Answer
    A. Trachea, primary bronchus, secondary bronchus, tertiary bronchus (many x's over), bronchiole, alveolui
    Explanation
    The correct answer is the sequence of structures that air passes through in the respiratory system: trachea, primary bronchus, secondary bronchus, tertiary bronchus, bronchiole, and alveoli. This is the correct order in which air travels from the upper respiratory tract down into the lungs. The trachea is the main airway that connects the throat to the bronchi, which then branch out into smaller airways called bronchioles. The bronchioles lead to tiny air sacs called alveoli, where gas exchange occurs.

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  • 3. 

    The 4 chambers of the heart are all except

    • Left atria

    • Septum

    • Right atria

    • Right ventricle

    • Left ventricle

    Correct Answer
    A. Septum
    Explanation
    The septum is not one of the chambers of the heart. The heart is divided into four chambers: the left atrium, right atrium, left ventricle, and right ventricle. The septum, on the other hand, is a wall of tissue that separates the left and right sides of the heart. It helps to prevent the mixing of oxygen-rich and oxygen-poor blood.

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  • 4. 

    Ventricle heart chambers are

    • On the top

    • On the bottom

    • On the left

    • On the right

    Correct Answer
    A. On the bottom
    Explanation
    The ventricle heart chambers are located on the bottom. The ventricles are the lower chambers of the heart that pump blood out to the body and lungs. They are positioned beneath the atria, which are the upper chambers of the heart. The ventricles are responsible for pumping oxygenated blood to the body and deoxygenated blood to the lungs for oxygenation. Being positioned at the bottom allows the ventricles to efficiently pump blood throughout the circulatory system.

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  • 5. 

    Path of blood through the body

    • Oxygenated blood exits the heart, moves through major arteries, subdivides into smaller arteries, blood enters the capillary network and oxygen is delivered to body tissues and becomes deoxygenated, blood enters venules of a venous system, blood drains to major veins and returns to the heart

    • No

    Correct Answer
    A. Oxygenated blood exits the heart, moves through major arteries, subdivides into smaller arteries, blood enters the capillary network and oxygen is delivered to body tissues and becomes deoxygenated, blood enters venules of a venous system, blood drains to major veins and returns to the heart
    Explanation
    This answer correctly describes the path of blood through the body. It starts with oxygenated blood leaving the heart and moving through major arteries. It then subdivides into smaller arteries before entering the capillary network where oxygen is delivered to body tissues and the blood becomes deoxygenated. The deoxygenated blood then enters venules of a venous system and eventually drains into major veins, which return the blood back to the heart.

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  • 6. 

    3 primary formed elements of the blood are all of these except:

    • Marrow

    • Red blood cells

    • White blood cells

    • Platelets

    Correct Answer
    A. Marrow
    Explanation
    The question asks for the exception among the three primary formed elements of blood. Marrow is not considered one of the formed elements of blood. Marrow is a soft, gelatinous tissue found inside the bones, and it is responsible for producing red blood cells, white blood cells, and platelets. Therefore, marrow is not an exception among the three primary formed elements of blood.

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  • 7. 

    White blood cells:

    • Carry oxygen

    • Have no organelles

    • Made up of hemoglobin

    • Contain all the sytoplasmic organelles, remove debris, fight infections

    • Do not exist

    Correct Answer
    A. Contain all the sytoplasmic organelles, remove debris, fight infections
    Explanation
    White blood cells contain all the cytoplasmic organelles, remove debris, and fight infections. These cells are an essential part of the immune system and play a crucial role in defending the body against pathogens. They have various organelles, such as mitochondria, endoplasmic reticulum, and Golgi apparatus, which are responsible for carrying out different cellular functions. White blood cells also have the ability to engulf and destroy foreign particles and dead cells, thereby removing debris from the body. Additionally, they produce antibodies and release chemicals to combat infections and protect the body from harmful microorganisms.

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  • 8. 

    The valves of teh heart are all except

    • Papillary (center)

    • Atrioventricular (Tricuspid (right))

    • Atrioventricular (bicuspid (left))

    • Pulmonary (right)

    • Aortic (left)

    Correct Answer
    A. Papillary (center)
    Explanation
    The valves of the heart include the atrioventricular valves (tricuspid on the right side and bicuspid on the left side), pulmonary valve (on the right side), and aortic valve (on the left side). However, papillary valves are not a part of the heart's valve structure. Therefore, the correct answer is papillary (center).

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  • 9. 

    Did you study cellular respiration?

    • Yes

    • No

    • None of the above

    Correct Answer
    A. Yes
    Explanation
    The given correct answer is "Yes" because the question asks if the person studied cellular respiration, and the answer indicates that they did.

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  • 10. 

    Air treatment involves all of the following except

    • Purified

    • Humidified

    • Created

    • Warmed

    Correct Answer
    A. Created
    Explanation
    Air treatment involves processes such as purifying, humidifying, and warming the air to improve its quality and comfort. However, "creating" air is not a part of air treatment as air already exists naturally. Therefore, the correct answer is "created".

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  • 11. 

    Red blood cells:

    • Least amount in blood

    • Contain organelles

    • Made up of hemoglobin, carry oxygen

    • Remove debris

    • Do not exist

    Correct Answer
    A. Made up of hemoglobin, carry oxygen
    Explanation
    Red blood cells are made up of hemoglobin, a protein that allows them to carry oxygen throughout the body. This is their main function, as they pick up oxygen from the lungs and deliver it to all the tissues in the body. Red blood cells do not contain organelles and are specifically designed to be able to carry oxygen efficiently. They also play a role in removing debris and waste products from the body. The statement "do not exist" is incorrect and does not apply to red blood cells.

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  • 12. 

    The heart is _______ to the esophagus, and _______ to the diaphragm.

    • Anterior, superior

    • Superior, anterior

    • Anterior, anterior

    • Superior, superior

    • Nowhere

    Correct Answer
    A. Anterior, superior
    Explanation
    The heart is positioned in front of the esophagus, making it anterior to the esophagus. Additionally, the heart is located above or superior to the diaphragm. Therefore, the correct answer is "anterior, superior."

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  • 13. 

    Catabolism is...

    • The joining of large molecules to small molecules

    • The breakdown of large molecules into smaller ones

    • The lysis of cells

    Correct Answer
    A. The breakdown of large molecules into smaller ones
    Explanation
    Catabolism refers to the process of breaking down large molecules into smaller ones. This is an essential metabolic process that occurs in living organisms to release energy and obtain building blocks for various cellular processes. Through catabolism, complex molecules such as carbohydrates, proteins, and fats are broken down into simpler forms like glucose, amino acids, and fatty acids, respectively. This breakdown allows the body to extract energy and nutrients from these molecules to support various physiological functions.

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  • 14. 

    Platelets

    • Contain organelles

    • Graules (sacs) that help clot blood

    • Remove debris

    • Carry oxygen

    • Do not exist

    Correct Answer
    A. Graules (sacs) that help clot blood
    Explanation
    Platelets are small fragments of cells that circulate in the bloodstream. They contain organelles called granules or sacs, which play a crucial role in blood clotting. When there is an injury, these granules release various substances that initiate the clotting process. They help in the formation of a clot, which prevents excessive bleeding. Therefore, the presence of granules in platelets is essential for their function in clotting blood.

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  • 15. 

    These are true of the trachea except for

    • Windpipe

    • Voicebox

    • Supported by c shaped cartilaginous rings

    • Lines with pseudostratified columnar epithlia

    Correct Answer
    A. Voicebox
    Explanation
    The trachea, also known as the windpipe, is a tube that connects the larynx (voicebox) to the bronchi of the lungs. It is supported by C-shaped cartilaginous rings, which prevent it from collapsing and maintain its shape. The trachea is lined with pseudostratified columnar epithelium, which helps to protect and lubricate the airway. Therefore, the correct answer is "voicebox" because the trachea is not the same as the larynx, which is responsible for producing sound.

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  • 16. 

    What organs are involved in the Urinary System?

    • Urethra, Urinary bladder, ureter, kidney

    • Urethra, Urinary bladder, ureter, pancreas

    • Urethra, Urinary bladder, kidney, pancreas

    Correct Answer
    A. Urethra, Urinary bladder, ureter, kidney
    Explanation
    The urinary system consists of the urethra, urinary bladder, ureter, and kidney. The urethra is the tube that carries urine from the bladder to the outside of the body. The urinary bladder is a muscular sac that stores urine until it is ready to be expelled. The ureters are tubes that transport urine from the kidneys to the bladder. The kidneys are responsible for filtering waste products from the blood and producing urine.

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  • 17. 

    Atria heart chambers are 

    • On the left

    • On the bottom

    • On the top

    • On the right

    • Nowhere

    Correct Answer
    A. On the top
    Explanation
    The atria heart chambers are located on the top. This is because the heart is positioned in the chest cavity with the atria sitting on top of the ventricles. The atria receive blood returning to the heart from the body and lungs, and then pump it into the ventricles. The ventricles, on the other hand, are located on the bottom of the heart.

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  • 18. 

    The true pumps of the hearts are

    • The atria

    • The ventricles

    • The septum

    • All of it

    Correct Answer
    A. The ventricles
    Explanation
    The correct answer is the ventricles. The ventricles are the main pumping chambers of the heart and are responsible for pumping blood to the rest of the body. The atria, on the other hand, receive blood from the veins and pass it on to the ventricles. The septum is a wall that separates the left and right sides of the heart. While all of these components play a role in the functioning of the heart, the ventricles are specifically responsible for the pumping action.

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  • 19. 

    Diastole is when

    • The ventricles relax and fill up with blood

    • The ventricles contract

    • The atria contract

    • The atria relax and fill up with blood

    • A heart diet

    Correct Answer
    A. The ventricles relax and fill up with blood
    Explanation
    During diastole, the ventricles of the heart relax, allowing them to expand and fill up with blood. This phase occurs after the ventricles have pumped blood out to the rest of the body during systole. The relaxation of the ventricles allows them to refill with oxygenated blood from the atria, preparing them for the next contraction. This process ensures a continuous flow of blood throughout the body and is essential for proper heart function.

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  • 20. 

    Blood vessel lining from superficial to deep 

    • Tunica media, tunica externa, tunia intima

    • Tunica intima, tunica media, tunica extrena

    • Tunica externa, tunica media, tunica intima

    Correct Answer
    A. Tunica externa, tunica media, tunica intima
    Explanation
    The correct answer is tunica externa, tunica media, tunica intima. This is the correct order of the layers of the blood vessel lining from superficial to deep. The tunica externa is the outermost layer, followed by the tunica media in the middle, and finally the tunica intima on the innermost layer.

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  • 21. 

    Insulin is produced by the...

    • Pancreas

    • Kidneys

    • Adrenal glands

    Correct Answer
    A. Pancreas
    Explanation
    Insulin is a hormone that regulates blood sugar levels in the body. It is produced by the pancreas, specifically by the beta cells in the islets of Langerhans. These cells are responsible for monitoring blood glucose levels and releasing insulin when necessary. The pancreas plays a crucial role in maintaining normal blood sugar levels and preventing conditions like diabetes. Kidneys and adrenal glands do not produce insulin, making the pancreas the correct answer.

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  • 22. 

    Blood transports all except:

    • Nutrients: digested, then absorbed

    • Gases: oxygen, carbon dioxide

    • Wastes: urea, ammonia, CO2

    • Heat: produced by muscles

    • Cargo: luggage, clothing

    • Defenses: clotting, immune responses

    • Hormones: protein or steroid based molecules

    • Drugs/Toxins: medications, drugs

    Correct Answer
    A. Cargo: luggage, clothing
    Explanation
    Blood transports various substances such as nutrients, gases, wastes, heat, defenses, hormones, and drugs/toxins. Nutrients are digested and absorbed, gases like oxygen and carbon dioxide are carried, wastes like urea, ammonia, and CO2 are transported, heat produced by muscles is circulated, defenses such as clotting and immune responses are carried, hormones (protein or steroid based molecules) are transported, and drugs/toxins like medications and drugs are also transported. However, blood does not transport cargo like luggage and clothing.

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  • 23. 

    Blood vessels that lead to the myocardium

    • Left and right testicles

    • Left and right ventricles

    • Left and right atria

    • Left and right coronary arteries

    Correct Answer
    A. Left and right coronary arteries
    Explanation
    The left and right coronary arteries are the blood vessels that supply oxygenated blood to the myocardium, which is the muscular tissue of the heart. These arteries branch off from the aorta and wrap around the heart, providing essential nutrients and oxygen to the heart muscle. Without the left and right coronary arteries, the myocardium would not receive adequate blood supply, leading to ischemia and potentially causing a heart attack or other cardiovascular complications.

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  • 24. 

    Common ways to regulate the heart include all except

    • Voluntary control

    • Autonomic nervous system (fight or flight)

    • Endocrine system (released during stress)

    • Physical factors (body temperature)

    Correct Answer
    A. Voluntary control
    Explanation
    The heart is primarily regulated by the autonomic nervous system and the endocrine system. The autonomic nervous system controls the heart rate and rhythm, while the endocrine system releases hormones like adrenaline during stress, which can affect heart function. Physical factors such as body temperature can also influence heart rate. However, voluntary control, or conscious control over the heart rate, is not a common way to regulate the heart.

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  • 25. 

    Random question:  Did you remember to study cellular respiration?

    • Yes

    • No

    Correct Answer
    A. Yes
    Explanation
    The given correct answer is "Yes" because the question is asking if the person remembered to study cellular respiration. By answering "Yes," it implies that the person did remember to study cellular respiration.

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  • 26. 

    Prolactin (stimulates milk production) is produced by...

    • Uterus

    • Ovaries

    • Pituitary gland

    Correct Answer
    A. Pituitary gland
    Explanation
    Prolactin, which stimulates milk production, is produced by the pituitary gland. The pituitary gland is a small gland located at the base of the brain and is often referred to as the "master gland" because it produces and releases various hormones that regulate many bodily functions. In the case of milk production, the pituitary gland produces and releases prolactin in response to the stimulation of the hormone oxytocin, which is released during breastfeeding. This process helps to initiate and maintain lactation in women.

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  • 27. 

    What is four functions of the digestive system?

    • Take in food, breakdown food, absorb digested molecules, stimulate water balance

    • Take in food, breakdown food, provide nutrients, increase milk production

    • Take in food, breakdown food, absorb digested molecules, eliminate waste

    Correct Answer
    A. Take in food, breakdown food, absorb digested molecules, eliminate waste
    Explanation
    The correct answer is "Take in food, breakdown food, absorb digested molecules, eliminate waste." The digestive system is responsible for taking in food through the mouth, breaking it down into smaller molecules through mechanical and chemical digestion, absorbing the digested molecules into the bloodstream, and eliminating waste products through the rectum and anus.

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  • 28. 

    When blood enters the right atrium it falls into the ______ because the tricuspid valve is open

    • Septum

    • Left atria

    • Right atria

    • Left ventricle

    • Right ventricle

    Correct Answer
    A. Right ventricle
    Explanation
    When blood enters the right atrium, it falls into the right ventricle because the tricuspid valve is open. The tricuspid valve is located between the right atrium and right ventricle, and when it is open, it allows blood to flow from the atrium into the ventricle. This is part of the normal flow of blood through the heart, as the right ventricle pumps the blood to the lungs to be oxygenated.

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  • 29. 

    The heart is systole when

    • When the ventricles (main pumping chambers) contract

    • When the ventricles (main pumping chambers) relax and fill up

    • When the atria contract

    • When the atria relax and fill up

    Correct Answer
    A. When the ventricles (main pumping chambers) contract
    Explanation
    When the ventricles (main pumping chambers) contract, the heart goes through systole. During systole, the ventricles forcefully pump blood out of the heart and into the arteries. This is an important phase of the cardiac cycle as it allows for the circulation of oxygenated blood to the rest of the body.

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  • 30. 

    What is a calorie?

    • The basis of the food intake

    • The amount of energy needed to raise the temper of 1 gram of water by 1*C

    • The amount of food intake in serving

    Correct Answer
    A. The amount of energy needed to raise the temper of 1 gram of water by 1*C
    Explanation
    A calorie is defined as the amount of energy required to raise the temperature of 1 gram of water by 1 degree Celsius. It is a unit of measurement used to quantify the energy content of food and beverages. This measurement helps in understanding the energy value of different foods and their impact on our bodies.

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  • 31. 

    How much blood is in the human body?

    • 7 Litres

    • 5-6 Litres

    • 4 Litres

    • 5-6 Gallons

    • 4 Gallons

    Correct Answer
    A. 5-6 Litres
    Explanation
    The correct answer is 5-6 Litres. This is the average amount of blood in the human body. The volume of blood can vary depending on factors such as age, sex, and body size, but on average, an adult human has approximately 5-6 liters of blood circulating in their body. Blood plays a vital role in transporting oxygen, nutrients, hormones, and waste products throughout the body, as well as regulating body temperature and maintaining overall health and homeostasis.

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  • 32. 

    The lub sound of the heart is

    • The tricuspid valve closing

    • The tricuspid valve opening

    • Semilunar valve closing

    • Semilunar valve opening

    Correct Answer
    A. The tricuspid valve closing
    Explanation
    The lub sound of the heart is caused by the tricuspid valve closing. This valve is located between the right atrium and right ventricle of the heart. When the ventricles contract, the tricuspid valve closes to prevent blood from flowing back into the atrium. This closure creates a sound that can be heard as the lub sound during a heartbeat.

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  • 33. 

    These are true of the larynx except for

    • Voicebox

    • Surrounded by hyaline cartilage

    • Protected by the epiglottis

    • Throat

    Correct Answer
    A. Throat
    Explanation
    The given options describe characteristics of the larynx, except for "throat." The larynx is commonly known as the voicebox and is surrounded by hyaline cartilage. It is protected by the epiglottis, which prevents food from entering the airway during swallowing. However, the larynx is not synonymous with the throat. The throat refers to the entire passage that includes the larynx, pharynx, and esophagus. Therefore, the option "throat" does not accurately describe the larynx.

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  • 34. 

    ATP hydrolizes to...

    • ADP

    • ADP and Pi

    • Pi

    Correct Answer
    A. ADP and Pi
    Explanation
    ATP (adenosine triphosphate) is a molecule that stores and releases energy in living cells. When ATP is hydrolyzed, it breaks down into ADP (adenosine diphosphate) and inorganic phosphate (Pi). This process releases energy that can be used by the cell for various metabolic reactions. Therefore, the correct answer is ADP and Pi, as both products are formed when ATP is hydrolyzed.

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  • 35. 

    Growth hormone is secreted by what gland?

    • Pituitary

    • Thyroid

    • Parathyroid

    • Adrenal

    • Pancreas

    Correct Answer
    A. Pituitary
    Explanation
    The growth hormone is secreted by the pituitary gland. The pituitary gland is often referred to as the "master gland" because it produces and releases several hormones that regulate various bodily functions. The growth hormone plays a crucial role in stimulating growth and development during childhood and adolescence. It also helps regulate metabolism, muscle and bone growth, and the production of other hormones in the body.

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  • 36. 

    The blood exists the pulmonary arteries and goes to the lungs for oxygen and then

    • Goes in the left vena cava, left atria, left ventricle

    • Goes in the right vena cava, right atria, right ventricle

    • Goes to the brain

    • Goes to the  nose

    Correct Answer
    A. Goes in the right vena cava, right atria, right ventricle
    Explanation
    In the circulatory system, deoxygenated blood is pumped from the right ventricle of the heart into the pulmonary arteries, which carry it to the lungs for oxygenation. After being oxygenated in the lungs, the blood returns to the heart through the pulmonary veins and enters the left atria and then the left ventricle before being pumped out to the rest of the body.

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  • 37. 

    The heart lies in a chamber called:

    • Heart valve

    • Mediastinum

    • Heart chamber

    • Mediacenter

    • Heartstinum

    Correct Answer
    A. Mediastinum
    Explanation
    The heart lies in a chamber called the mediastinum. The mediastinum is the central compartment of the thoracic cavity, located between the lungs. It contains various structures including the heart, great vessels, esophagus, and trachea. The heart is specifically situated within the mediastinum, where it is protected and surrounded by other vital structures.

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  • 38. 

    ADH

    • Increases water absorption

    • Increases milk "let-down"

    • Increases skin pigmentation

    Correct Answer
    A. Increases water absorption
    Explanation
    ADH, or antidiuretic hormone, is a hormone produced by the hypothalamus and released by the pituitary gland. Its main function is to regulate the body's water balance by increasing water absorption in the kidneys. When ADH levels are high, the kidneys reabsorb more water, resulting in decreased urine production and increased water retention in the body. This helps to prevent dehydration and maintain proper fluid balance. Therefore, the correct answer is that ADH increases water absorption.

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  • 39. 

    Cardiac muscle is

    • Striated

    • Squamous

    • Columnar

    • Pumped

    Correct Answer
    A. Striated
    Explanation
    Cardiac muscle is classified as striated because it has a striped or striated appearance under a microscope. This is due to the arrangement of contractile proteins called myofilaments within the muscle cells. The presence of these myofilaments gives cardiac muscle its characteristic striated appearance, similar to skeletal muscle.

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  • 40. 

    The vena cava (largest veins) return deoxygenated blood to the

    • Right ventricle

    • Left atrium

    • Right atrium

    • Left ventricle

    Correct Answer
    A. Right atrium
    Explanation
    The vena cava is a large vein that carries deoxygenated blood from the body back to the heart. It has two main branches, the superior vena cava and the inferior vena cava. The superior vena cava brings deoxygenated blood from the upper body, while the inferior vena cava brings deoxygenated blood from the lower body. Both of these veins empty into the right atrium of the heart. Therefore, the correct answer is right atrium.

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  • 41. 

    The structures of the respiratory track all except

    • Mouth

    • Nose

    • Pharynx

    • Larnyx

    Correct Answer
    A. Mouth
    Explanation
    The mouth is not considered a part of the respiratory tract. The respiratory tract starts with the nose, which filters and warms the air, and then continues to the pharynx, where the air is further filtered and moistened. From there, the air moves to the larynx, where sound is produced, and then down into the trachea and lungs. The mouth, although involved in the process of breathing, is primarily responsible for other functions such as eating and speaking.

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  • 42. 

    The dub sound of the heart is

    • Semilunar valve closing

    • Semilunar valve opening

    • Tricuspid valve closing

    • Tricuspid valve opening

    • None

    Correct Answer
    A. Semilunar valve closing
    Explanation
    The correct answer is semilunar valve closing. The dub sound of the heart is produced when the semilunar valves, which are located between the ventricles and the major arteries leaving the heart, close. This closure prevents the backflow of blood into the ventricles and ensures that blood flows in one direction. The closing of the semilunar valves creates a distinct sound that can be heard during a cardiac examination.

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  • 43. 

    What is divided into duodenum, jejunum, and ileum?

    • Small intestine

    • Large intestine

    • Esophagus

    • Pharynx

    Correct Answer
    A. Small intestine
    Explanation
    The small intestine is divided into three parts: the duodenum, jejunum, and ileum. The duodenum is the first part of the small intestine and receives partially digested food from the stomach. The jejunum and ileum are responsible for further digestion and absorption of nutrients. The large intestine, esophagus, and pharynx are not divided into duodenum, jejunum, and ileum, making them incorrect options.

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  • 44. 

    These are true of the pharynx except for

    • Voicebox

    • Throat

    • Muscular tube

    • Made up for 3 segments; oro, larngo, naso

    Correct Answer
    A. Voicebox
    Explanation
    The correct answer is "voicebox" because the voicebox, also known as the larynx, is actually a part of the pharynx. The pharynx is a muscular tube that is made up of three segments: the oro (mouth), laryngo (voicebox), and naso (nose) segments. Therefore, the voicebox is not excluded from the characteristics of the pharynx, making it the exception in this list.

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  • 45. 

    All at true of the bronci and bronchioles except for

    • 3 segments

    • Branch from trachea towards different lungs

    • 5 branches lead to 5 lobes of the lungs

    • 3 air sacs of the right and 2 on the left

    Correct Answer
    A. 3 segments
    Explanation
    The correct answer is 3 segments. This is because the bronchi and bronchioles do not have 3 segments. The bronchi and bronchioles are the airways that branch from the trachea towards the different lobes of the lungs. They further divide into smaller branches called bronchioles. The 5 branches leading to the 5 lobes of the lungs and the presence of 3 air sacs on the right and 2 on the left are all true statements about the bronchi and bronchioles.

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  • 46. 

    Repolarization

    • Charge changes from negative to positive, sodium rushes in

    • Charge changes from positive to negative, opening voltage gated channels, potassium rushes out

    • Charge changes from positive to negative, opening ligand gated channels, sodium rushes in

    • Charge changes from negative to positive, opening ligand gated channels, sodium rushes in

    Correct Answer
    A. Charge changes from positive to negative, opening voltage gated channels, potassium rushes out
    Explanation
    During repolarization, the charge inside the cell changes from positive to negative. This change in charge causes the voltage-gated channels to open, allowing potassium ions to rush out of the cell. This movement of potassium ions out of the cell helps to restore the cell's resting membrane potential and brings the charge back to a negative value.

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  • 47. 

    The layers of the heart from superficial to deep are:

    • Fibrous pericardium, endocardium, myocardium, serous membrane (parietal pericardium, visceral pericardium)

    • Endocardium, myocardium, serous membrane (parietal pericardium, visceral pericardium), fibrous pericardium

    • Ribosomal RNA and ribosome protein syntehsis

    • Fibrous pericardium, serous membrane (parietal pericardium, visceral pericardium), myocardium, endocardium

    • Serous membrane (parietal pericardium, visceral pericardium), myocardium, endocardium, fibrous pericardium

    Correct Answer
    A. Fibrous pericardium, serous membrane (parietal pericardium, visceral pericardium), myocardium, endocardium
    Explanation
    The correct answer is fibrous pericardium, serous membrane (parietal pericardium, visceral pericardium), myocardium, endocardium. This is the correct order of the layers of the heart from superficial to deep. The fibrous pericardium is the outermost layer, followed by the serous membrane which consists of the parietal pericardium and the visceral pericardium. The myocardium is the middle layer and is responsible for the contraction of the heart. The endocardium is the innermost layer and lines the chambers of the heart.

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  • 48. 

    What purifies the air

    • Mucus and cilia

    • Cilia and nose hairs

    • Mucus and boogers

    • Lysol

    • Febreeze

    Correct Answer
    A. Mucus and cilia
    Explanation
    Mucus and cilia work together to purify the air. Mucus is a sticky substance produced by the respiratory system that traps dust, bacteria, and other particles in the air. Cilia are tiny hair-like structures that line the respiratory tract and move in coordinated waves. These cilia help to move the trapped particles, along with the mucus, out of the respiratory system, preventing them from entering the lungs. This process helps to filter and purify the air we breathe.

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  • 49. 

    For myosin to be release

    • ADP and Pi must be hydrolized

    • Myosin must bind to trypomyosin

    • ATP must bind to myosin

    • None of the above

    Correct Answer
    A. ATP must bind to myosin
    Explanation
    When ATP binds to myosin, it provides the necessary energy for myosin to release from actin filaments. This allows the muscle contraction cycle to continue. ADP and Pi being hydrolyzed are necessary steps in the contraction cycle but do not directly cause myosin release. Binding of myosin to tropomyosin is also a step in muscle contraction, but it does not specifically lead to myosin release. Therefore, the correct answer is that ATP must bind to myosin for myosin to be released.

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Quiz Review Timeline (Updated): Sep 14, 2023 +

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  • Current Version
  • Sep 14, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 05, 2018
    Quiz Created by
    Angela

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