A&p II Test # 1

Hypertension refers to high blood pressure, which is a condition where the force of blood against the walls of the arteries is consistently too high. It is a chronic medical condition that can lead to various health problems, including heart disease, stroke, and kidney disease. High blood pressure is typically diagnosed when the systolic pressure (the top number) is consistently above 130 mmHg and/or the diastolic pressure (the bottom number) is consistently above 80 mmHg. Treatment for hypertension often involves lifestyle changes and medication to lower blood pressure and reduce the risk of complications.

The endocrine system is responsible for maintaining homeostasis by communication and coordination using biochemicals secreted directly into the bloodstream. It consists of glands that produce hormones, which are chemical messengers that travel through the bloodstream to target cells or organs. These hormones regulate various bodily functions such as metabolism, growth and development, reproduction, and response to stress. By secreting hormones into the bloodstream, the endocrine system ensures that the body's internal environment remains stable and balanced.

Graves disease is indeed a type of toxic goiter and an autoimmune disease. It occurs when the body's immune system mistakenly attacks the thyroid gland, causing it to produce excessive amounts of thyroid hormones. This leads to hypersecretion of the thyroid gland, resulting in symptoms such as weight loss, rapid heartbeat, and enlarged thyroid gland. Therefore, the statement is true.

Glucagon is indeed secreted in response to hypoglycemia. When blood sugar levels are low, the release of glucagon from the pancreas helps to raise blood glucose levels by stimulating the liver to break down stored glycogen into glucose (glycogenolysis) and by promoting the synthesis of new glucose from amino acids (gluconeogenesis). This results in an elevated blood glucose level. Additionally, glucagon has an antagonistic relationship with insulin, as insulin promotes the uptake and storage of glucose, while glucagon promotes the release of glucose into the bloodstream. Therefore, the statement "Glucagon is secreted in response to hypoglycemia; it stimulates liver glycogenolysis and gluconeogenesis; the result is an elevated blood glucose level; and it is an antagonist to insulin" is true.

Vasoconstriction is the correct answer because it is the opposite of vasodilation. Vasomotion refers to the rhythmic contraction and relaxation of blood vessels, which can lead to either vasodilation or vasoconstriction. Therefore, vasoconstriction is the other type of vasomotion, where the blood vessels narrow and restrict blood flow.

The cardinal signs of inflammation include pain, fever, redness, and swelling. Inflammation is a natural response of the body to injury or infection, and these signs indicate that the immune system is actively working to heal the affected area. Pain is often caused by the release of chemicals that stimulate nerve endings, while fever is a systemic response that helps to fight off infections. Redness and swelling are caused by increased blood flow and the accumulation of fluid in the affected area. Therefore, all of the options listed (pain, fever, redness, and swelling) are correct.

The given answer, "True," is correct because the question states that the attending physician has ordered a "CBC with 'lytes and a 'diff" on Ms. Anne Thrax. A CBC (complete blood count) includes a profile of white blood cells, which provides information about the different types and percentages of white blood cells present in the blood. Therefore, it is true that the order includes a profile (percentage) of white blood cells.

Oxytocin is the hormone that induces labor contractions of the uterine myometrium and post-partum expression of mammary gland milk. It is commonly referred to as OT or Pitocin.

Estrogen and progesterone are the two hormones that are normally secreted by the ovaries. Estrogen plays a crucial role in the development and regulation of the female reproductive system, as well as the growth of secondary sexual characteristics. Progesterone, on the other hand, is primarily involved in preparing and maintaining the uterus for pregnancy. These hormones work together to regulate the menstrual cycle and support reproductive functions in females.

The term "endocrine axis" or "hormonal axis" refers to a negative-feedback relationship among the hypothalamus, the pituitary gland, and some other endocrine gland. This relationship is designed to maintain homeostasis or balance in the body. One example of an endocrine axis is the CRH-ACTH-Adrenal Cortex axis, where the hypothalamus releases corticotropin-releasing hormone (CRH), which stimulates the pituitary gland to release adrenocorticotropic hormone (ACTH), which in turn stimulates the adrenal cortex to release cortisol. This axis operates through a negative-feedback loop, where increased cortisol levels inhibit the release of CRH and ACTH, helping to maintain balance in the body. Therefore, the statement is true.

Hemoglobin is the erythrocyte respiratory pigment that gives blood its color and transports oxygen. It is a protein found in red blood cells and is responsible for binding to oxygen in the lungs and delivering it to tissues throughout the body. Hemoglobin contains iron, which gives it its red color. Without hemoglobin, the blood would not be able to effectively transport oxygen, leading to oxygen deprivation in the body's tissues.

Blood veins are called "capacitance vessels" because they have the unique ability to expand and hold large volumes of blood. This expansion allows them to accommodate the varying amounts of blood flowing through the body, depending on the needs of different organs and tissues. This ability to capacitance helps in maintaining blood pressure and ensuring efficient circulation throughout the body. Therefore, the statement is true.

Flow and resistance are inversely related because as resistance increases, flow decreases, and vice versa. This is based on Ohm's Law, which states that the flow of current (or in this case, flow) is equal to the voltage divided by the resistance. Therefore, if resistance increases, the flow of current will decrease. Conversely, if resistance decreases, the flow of current will increase.

The given statement is true. CRH, GnRH, PRH, and TRH are all releasing hormones. Releasing hormones are produced by the hypothalamus and they stimulate the release of other hormones from the pituitary gland. CRH (corticotropin-releasing hormone) stimulates the release of adrenocorticotropic hormone (ACTH), GnRH (gonadotropin-releasing hormone) stimulates the release of luteinizing hormone (LH) and follicle-stimulating hormone (FSH), PRH (prolactin-releasing hormone) stimulates the release of prolactin, and TRH (thyrotropin-releasing hormone) stimulates the release of thyroid-stimulating hormone (TSH).

cAMP, cGMP, and calcium ion (Ca+2) are all considered as second messengers because they play a crucial role in intracellular signaling pathways. Second messengers are molecules that transmit signals from the cell surface, where the initial signal is received, to the cell interior, where the response is generated. cAMP and cGMP are cyclic nucleotides that are involved in various cellular processes, including the regulation of enzyme activity and gene expression. Calcium ions, on the other hand, are involved in signaling pathways that regulate muscle contraction, neurotransmitter release, and many other cellular functions. Therefore, it is correct to say that cAMP, cGMP, and calcium ion (Ca+2) are all second messengers.

Aldosterone is indeed a mineralocorticoid produced by the adrenal cortex. Mineralocorticoids are hormones that regulate electrolyte and fluid balance in the body, and aldosterone specifically helps in the reabsorption of sodium and the excretion of potassium in the kidneys. It plays a crucial role in maintaining blood pressure and electrolyte levels, making the statement true.

The approximate range of blood pressure on the left side of the heart is 80 - 120 mm Hg. This range is considered normal for a healthy individual. Blood pressure measures the force exerted by blood against the walls of the arteries. The left side of the heart pumps oxygenated blood to the rest of the body, so the blood pressure in this area is typically higher than the right side of the heart. A blood pressure reading within the range of 80 - 120 mm Hg indicates that the heart is functioning properly and maintaining a healthy blood flow.

A synergistic effect is when two or more hormones work together to produce an effect that is greater than the sum of their individual effects. This means that the combined action of these hormones enhances their overall effectiveness in achieving a particular outcome. It is a cooperative interaction between hormones that leads to a more powerful response in the body.

The correct answer is Insulin-dependent diabetes mellitus. This abbreviation refers to a type of diabetes in which the body is unable to produce enough insulin to regulate blood sugar levels. Insulin is a hormone that helps to control the amount of glucose in the blood. In this condition, individuals require regular insulin injections to manage their blood sugar levels. The other options provided in the question are not related to diabetes or insulin.

Capillaries are tiny blood vessels that connect arteries and veins. They have thin walls which allow for the exchange of oxygen, nutrients, and waste products between the blood and surrounding tissues. Capillaries play a crucial role in the transportation of substances throughout the body and are involved in the delivery of oxygen and nutrients to cells, as well as the removal of waste products such as carbon dioxide.

Thyroid-stimulating hormone (TSH) is the correct answer because it is the hormone that stimulates the secretion of T3 and T4. TSH is produced and released by the pituitary gland in response to thyrotropin-releasing hormone (TRH) from the hypothalamus. TSH then acts on the thyroid gland to stimulate the production and release of T3 and T4, which are important hormones for regulating metabolism and growth in the body. Insulin, glucagon, and growth hormone do not directly stimulate the secretion of T3 and T4.

Arteries are the correct answer because they are the blood vessels that carry oxygenated blood away from the heart to the rest of the body. They have thick, elastic walls that allow them to withstand the high pressure of blood being pumped out of the heart. Arteries branch out into smaller vessels called arterioles, which eventually lead to capillaries where the exchange of oxygen and nutrients with body tissues occurs. Veins, on the other hand, carry deoxygenated blood back to the heart, while capillaries are the smallest blood vessels where the exchange of substances between blood and tissues takes place.

ADH, also known as vasopressin, is a hormone that acts on the kidney tubules to enhance the retention of water. It helps the kidneys reabsorb water from the urine back into the bloodstream, thereby preventing excessive water loss and promoting water conservation. This hormone is often referred to as the "salt wasting hormone" because it increases the reabsorption of water, leading to the excretion of concentrated urine and the conservation of salt in the body.

Cortisol is the glucocorticoid hormone associated with stress. It is produced by the adrenal glands in response to stress and helps regulate the body's response to stress by increasing blood sugar levels, suppressing the immune system, and aiding in metabolism. Cortisol also plays a role in the fight-or-flight response, helping the body to respond to stressful situations.

The term "agglutino-" refers to the process of clumping or sticking together. This can be seen in various contexts, such as in blood typing where agglutination occurs when incompatible blood types are mixed. In this case, the correct answer is "Clumping" because it accurately defines the term "agglutino-".

Insulin is a hormone that helps regulate blood sugar levels. It is released into the bloodstream by beta cells located in the pancreas. These beta cells are responsible for producing and secreting insulin in response to changes in blood glucose levels. The pancreas plays a crucial role in maintaining proper blood sugar balance, and the release of insulin by beta cells is essential for this process.

Epinephrine, norepinephrine, and L-dopamine are examples of catecholamines. Catecholamines are a class of hormones that are derived from the amino acid tyrosine. They are produced and released by the adrenal glands and play a role in the body's response to stress. Epinephrine and norepinephrine are commonly known as adrenaline and noradrenaline, respectively. They are involved in the "fight or flight" response, increasing heart rate, blood pressure, and energy availability. L-dopamine is a precursor to both epinephrine and norepinephrine and is involved in regulating movement, mood, and motivation.

Glucagon is released into the bloodstream by alpha cells located in the pancreas. Alpha cells are a type of endocrine cells found in the islets of Langerhans in the pancreas. These cells are responsible for producing and releasing glucagon, a hormone that helps increase blood sugar levels by stimulating the liver to convert stored glycogen into glucose.

Erythropoietin is the correct answer because it is the hormone secreted by the kidneys that stimulates the production of red blood cells in the bone marrow. This hormone plays a crucial role in maintaining the balance of red blood cells in the body and is released in response to low oxygen levels in the blood. Erythropoietin stimulates the bone marrow to produce more red blood cells, which helps increase oxygen-carrying capacity and maintain homeostasis.

Automaticity refers to the ability of the SA (sinoatrial) node, which is located in the right atrium of the heart, to generate electrical impulses spontaneously and initiate the heartbeat. These electrical impulses then spread throughout the heart, causing it to contract and pump blood. Therefore, the correct answer is "Self-pacing of the SA node."

The correct answer is "Intrinsic". In blood coagulation, there are two distinct pathways that eventually join. The first pathway is the extrinsic pathway, which involves clotting factors in the perivascular tissue surrounding the blood vessel. The second pathway, known as the intrinsic pathway, involves clotting factors within the blood stream.

Erythrocytes, also known as red blood cells, are responsible for transporting oxygen from the lungs to the tissues and carbon dioxide from the tissues to the lungs. These cells contain a protein called hemoglobin, which binds to oxygen in the lungs and releases it in the tissues. Erythrocytes have a unique biconcave shape that allows for a larger surface area for gas exchange. Additionally, they lack a nucleus, which gives them more space to carry oxygen. Thrombocytes are involved in blood clotting, leukocytes are responsible for immune responses, fibrocytes are a type of connective tissue cell, and hepatocytes are liver cells.

Calcium is essential for blood coagulation because it is involved in several steps of the coagulation cascade. When there is an injury or damage to blood vessels, a series of reactions occur to form a blood clot and stop bleeding. Calcium ions are required for the activation of various clotting factors, including factor X and factor II (prothrombin). These factors then lead to the formation of fibrin, which is the main component of a blood clot. Without sufficient calcium, the clotting process would be impaired, leading to prolonged bleeding or difficulty in stopping bleeding altogether. Therefore, it is true that calcium plays a crucial role in the process of blood coagulation.

The approximate blood volume of the human body is 5 - 5.5 liters. This is the correct answer because it is within the range of normal blood volume for an average adult human. Blood volume can vary slightly depending on factors such as age, sex, and body size, but 5 - 5.5 liters is a commonly accepted range.

The diastolic pressure is the bottom number in a blood pressure reading, representing the pressure in the arteries when the heart is at rest between beats. In this case, the blood pressure is given as "120 over 80," where 120 is the systolic pressure (top number) and 80 is the diastolic pressure (bottom number). Therefore, the patient's diastolic pressure is 80.

The given statement is false. The correct answer is false because it states that nervous system responses continue long after the stimulus ceases, which is incorrect. Nervous system responses are typically immediate and cease once the stimulus is removed. Additionally, the statement incorrectly states that endocrine system responses endure 1-10 milliseconds, when in fact, endocrine responses can last much longer.

Diabetes mellitus is the correct answer because it is the most prevalent metabolic disease worldwide and it is also the leading cause of adult blindness, renal failure, gangrene, and the necessity for limb amputations. Diabetes mellitus is a chronic condition characterized by high blood sugar levels due to the body's inability to produce or effectively use insulin. It can lead to various complications, including damage to the eyes, kidneys, and extremities.

Gastrin is the hormone produced by the stomach that stimulates the release of HCl. HCl is an important component of gastric acid, which aids in the digestion of food. Gastrin is released in response to the presence of food in the stomach, and it acts on the parietal cells of the stomach to stimulate the production and release of HCl. This hormone helps in the breakdown of proteins and the absorption of certain nutrients in the stomach.

The specific heart valve through which blood passes as it departs the right ventricle and enters the pulmonary trunk on its way to the lungs is the pulmonary semilunar valve. This valve prevents the backflow of blood from the pulmonary trunk into the right ventricle and ensures that blood flows in one direction, from the right ventricle to the lungs.

Albumin is a blood protein that is produced by the liver and is responsible for maintaining the osmotic pressure of blood, transporting hormones, drugs, and fatty acids, and regulating pH levels. It is the most abundant protein in the blood, making up approximately 60% of all blood proteins. This high percentage of albumin in the blood indicates its crucial role in maintaining overall body functions.

The thymus gland produces the hormones thymosin, thymulin, and thymopoietin. These hormones play a crucial role in the development and maturation of T-lymphocytes, which are important for the immune system. The thymus gland is located in the upper chest, behind the sternum, and is most active during childhood and adolescence. It gradually decreases in size and function as a person ages.

Thrombocytes, also known as platelets, are not cells but rather small cell fragments. They are involved in blood clotting and are responsible for forming clots to stop bleeding. Unlike erythrocytes (red blood cells) and leukocytes (white blood cells), thrombocytes do not have a nucleus and are derived from megakaryocytes in the bone marrow. Therefore, thrombocytes can be considered as "a bag of clotting agents" rather than a complete cell.

During isovolumetric contraction and isovolumetric relaxation, all heart valves are closed. This is because isovolumetric contraction occurs when the ventricles are contracting but no blood is being ejected from the heart, and isovolumetric relaxation occurs when the ventricles are relaxing but no blood is being filled. In both of these phases, the atrioventricular valves (mitral and tricuspid valves) are closed to prevent backflow of blood into the atria, and the semilunar valves (aortic and pulmonary valves) are closed to prevent blood from flowing back into the ventricles. Therefore, all heart valves are indeed closed during isovolumetric contraction and isovolumetric relaxation.

Half-life is the term used to describe the time required for 50% of a substance, in this case a hormone, to be cleared from the blood stream. It is a measure of how quickly a substance is eliminated from the body.

Cushing syndrome is the correct answer because it is an endocrine disorder characterized by excess cortisol and aldosterone. Patients with Cushing syndrome exhibit abnormal fat deposition, such as a "buffalo hump" between the shoulders or a "moon face" due to the redistribution of fat. Additionally, Cushing syndrome is associated with adrenal disorders, which further supports the correct answer choice.

The term "induced fit" describes the current scientific model that explains the specificity between a hormone and its binding site on target cell membranes. This model is similar to the model that describes the interaction between an enzyme and a specific substrate. In the induced fit model, the hormone molecule undergoes conformational changes upon binding to its receptor, resulting in a tighter fit between the two molecules. This conformational change is induced by the binding and allows for optimal interaction and signaling between the hormone and its target cell.

End diastolic volume refers to the amount of blood present in the ventricles at the end of diastole, which is the relaxation phase of the cardiac cycle. During diastole, the ventricles fill with blood from the atria. The end diastolic volume is an important measure of the preload, or the amount of stretch, on the ventricles before they contract. It is typically measured using echocardiography or other imaging techniques and is an important parameter in assessing cardiac function.

The specific name of the heart valve located between the left atrium and left ventricle is the bicuspid valve, also known as the mitral valve. This valve consists of two leaflets or cusps that open and close to regulate blood flow from the left atrium to the left ventricle. It prevents the backflow of blood and ensures that blood flows in one direction, allowing for efficient pumping of oxygenated blood throughout the body.

The right and left coronary arteries are responsible for supplying blood to the heart. These arteries branch off from the aorta, the main artery that carries oxygenated blood from the heart to the rest of the body. The right coronary artery supplies blood to the right side of the heart, including the right atrium and right ventricle. The left coronary artery, on the other hand, splits into two main branches known as the left anterior descending artery and the left circumflex artery. These branches supply blood to the left side of the heart, including the left atrium and left ventricle.

In a Wrights blood smear, the most common type of leukocyte would be a neutrophil. Neutrophils are the most abundant type of white blood cells and play a crucial role in the immune response. They are responsible for phagocytosis, which involves engulfing and destroying pathogens and foreign particles. This makes them highly effective in combating infections and inflammation.