Skeletal And Cardiac Muscle Trivia Quiz
School
Questions and Answers
- 1.
Muscle cells are called muscle fibers because of their coarse texture.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Muscle cells are not called muscle fibers because of their coarse texture. The term "muscle fibers" refers to the long, cylindrical shape of muscle cells, which resemble fibers. This term has nothing to do with the texture of the cells. Therefore, the statement is false.Rate this question:
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- 2.
Skeletal and cardiac muscle are striated by filaments in their myofibrils.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Skeletal and cardiac muscle are both striated, meaning they have a striped appearance, due to the presence of filaments in their myofibrils. These filaments, called actin and myosin, are responsible for muscle contraction. This characteristic is unique to these types of muscle and distinguishes them from smooth muscle, which lacks this striated appearance. Therefore, the statement that skeletal and cardiac muscle are striated by filaments in their myofibrils is true.Rate this question:
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- 3.
Once a skeletal muscle contracts, it cannot relax until acetylcholine is secreted.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
This statement is false. Once a skeletal muscle contracts, it can relax even without the secretion of acetylcholine. The relaxation of a muscle occurs when the nerve impulses that stimulate the contraction stop, causing the muscle fibers to stop contracting and return to their original state. Acetylcholine is involved in the initial activation of muscle contraction, but it is not required for muscle relaxation.Rate this question:
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- 4.
Acetylcholine causes skeletal muscles to contract.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Acetylcholine is a neurotransmitter that is responsible for transmitting signals from motor neurons to skeletal muscles. When acetylcholine binds to receptors on the muscle fibers, it triggers a series of events that ultimately lead to muscle contraction. Therefore, it is correct to say that acetylcholine causes skeletal muscles to contract.Rate this question:
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- 5.
Acetylcholinesterase is a neurotransmitter.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Acetylcholinesterase is not a neurotransmitter. It is an enzyme that breaks down the neurotransmitter acetylcholine in the synaptic cleft, terminating its action. Neurotransmitters are chemical messengers that transmit signals between nerve cells.Rate this question:
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- 6.
A buildup of lactic acid
- A.
Results from excess oxygen.
- B.
Causes muscle fatigue.
- C.
Can be corrected by increasing muscle activity.
- D.
Is cause by muscle cramps.
Correct Answer
B. Causes muscle fatigue.Explanation
Lactic acid is produced in the muscles during intense exercise when the body cannot supply enough oxygen to meet the demands of the muscles. This buildup of lactic acid leads to muscle fatigue, as it interferes with the muscles' ability to contract efficiently. Increasing muscle activity can help to correct this buildup by increasing blood flow and oxygen supply to the muscles. Muscle cramps, on the other hand, are caused by involuntary muscle contractions and are not directly related to lactic acid buildup.Rate this question:
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- 7.
A mother call your office about her 8 month-old who is notvery active and has not had a wet diaper for 2 days.
- A.
Bring the baby in tomorrow,when there is a open time slot on the schedule
- B.
Encourage the baby to drink water
- C.
Take the baby to the local emergency department.
- D.
Administer one dose of pediatric Tylenol and call back in 3 hours.
Correct Answer
C. Take the baby to the local emergency department.Explanation
Based on the given information, the baby is not very active and has not had a wet diaper for 2 days. These symptoms could indicate dehydration or a potential health issue. Taking the baby to the local emergency department is the most appropriate action as they will be able to assess the baby's condition and provide necessary medical care if needed.Rate this question:
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- 8.
When working with parents of young children who are at risk of botulism, it is most importantfor you to instruct them to do which of the following to reduce the risk?
- A.
Wash all foods well.
- B.
Do not use well water for infants or children.
- C.
Do not use raw fish or food from damage or bulging cans of vegetables.
- D.
Be sure to wash infants and children's hands before they eat.
Correct Answer
C. Do not use raw fish or food from damage or bulging cans of vegetables.Explanation
The correct answer is "do not use raw fish or food from damage or bulging cans of vegetables." This is the most important instruction to reduce the risk of botulism because raw fish and damaged or bulging cans of vegetables can potentially contain the botulinum toxin, which causes botulism. Washing foods well, not using well water for infants or children, and washing infants and children's hands before they eat are also important measures, but they are not specifically targeted at reducing the risk of botulism.Rate this question:
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- 9.
A young woman is seen in your clinic regulary. She has fibromalgia. You should suggest that she
- A.
Avoid any alcohol use
- B.
Reduce activities when her pain is the greatest.
- C.
Seek counseling to help develop better coping skills.
- D.
Increase her intake of caffeine to give her more energy.
Correct Answer
C. Seek counseling to help develop better coping skills.Explanation
Individuals with fibromyalgia often experience chronic pain and may struggle with coping mechanisms. Seeking counseling can be beneficial in helping the young woman develop better coping skills to manage her pain and improve her overall well-being. Counseling can provide her with strategies to reduce stress, improve sleep, and enhance her ability to handle the emotional and physical challenges associated with fibromyalgia. This can ultimately lead to a better quality of life and improved management of her condition.Rate this question:
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- 10.
A man staggers into your clinic.He is known to be a heavy cocaine and alcohol user.
- A.
Tetanus
- B.
Botulism
- C.
Trichinosis
- D.
Rhabdomyolysis
Correct Answer
D. RhabdomyolysisExplanation
Rhabdomyolysis is the breakdown of muscle tissue that leads to the release of muscle fiber contents into the bloodstream. This can occur due to various reasons, including drug and alcohol abuse. In this case, the man's heavy cocaine and alcohol use could have caused rhabdomyolysis, resulting in the symptoms of staggering. The breakdown of muscle tissue releases myoglobin, which can cause kidney damage, leading to dark urine and other complications. Therefore, rhabdomyolysis is the most likely explanation for the man's condition.Rate this question:
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- 11.
In order to get tetanus, a person must have a(a)
- A.
Impaired immune system.
- B.
Open wound,usually from a puncture by contaminated object.
- C.
Family history of tetanus.
- D.
High-stress life style.
Correct Answer
B. Open wound,usually from a puncture by contaminated object.Explanation
Tetanus is caused by the bacteria Clostridium tetani, which is commonly found in soil and animal feces. The bacteria can enter the body through an open wound, particularly a puncture wound caused by a contaminated object. Once inside the body, the bacteria produce a toxin that affects the nervous system, leading to symptoms such as muscle stiffness and spasms. Therefore, having an open wound, usually from a puncture by a contaminated object, is the most likely way for a person to contract tetanus.Rate this question:
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- 12.
An early sing of tetanus is
- A.
Drooling.
- B.
Fever.
- C.
Sweating.
- D.
Muscle spasm in the jaw and neck.
Correct Answer
D. Muscle spasm in the jaw and neck.Explanation
An early sign of tetanus is muscle spasm in the jaw and neck. This is because tetanus is a bacterial infection that affects the nervous system, specifically the muscles. The bacteria produce toxins that interfere with the normal functioning of the muscles, leading to spasms and stiffness. The jaw and neck muscles are often the first to be affected, causing difficulty in opening the mouth and swallowing. Therefore, muscle spasm in the jaw and neck is an early indicator of tetanus.Rate this question:
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- 13.
You are coaching a middle-school soccer team . You always instruct the players to warm up and do stretches before a match in order to
- A.
Keep them focused.
- B.
Have a better chance of winning.
- C.
Keep them warm.
- D.
Prevent injuries during the match.
Correct Answer
D. Prevent injuries during the match.Explanation
The correct answer is to prevent injuries during the match. Warm-up exercises and stretches help to increase blood flow to the muscles, improve flexibility, and prepare the body for physical activity. This reduces the risk of muscle strains, sprains, and other injuries that can occur during the match. By ensuring that the players are properly warmed up and stretched, the coach is taking proactive measures to keep the team safe and minimize the chances of injuries during the game.Rate this question:
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- 14.
Which of the following does not apply to skeletal muscle?
- A.
It is under voluntary control.
- B.
It has intercalated disc.
- C.
It is attached to bones
- D.
It contracts rapidly
Correct Answer
B. It has intercalated disc.Explanation
The correct answer is "It has intercalated disc." This statement does not apply to skeletal muscle because intercalated discs are found in cardiac muscle, not skeletal muscle. Intercalated discs are specialized structures that allow for coordinated contraction of cardiac muscle cells, while skeletal muscle does not have this feature. Skeletal muscle is under voluntary control, attached to bones, and contracts rapidly.Rate this question:
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- 15.
Which characteristics applies to smooth muscle?
- A.
It contracts rapidly.
- B.
It is under voluntary control.
- C.
It is slow to contract and relax.
- D.
It is self-exciting.
Correct Answer
C. It is slow to contract and relax.Explanation
Smooth muscle is a type of muscle tissue found in the walls of organs and blood vessels. Unlike skeletal muscle, it is not under voluntary control, meaning we cannot consciously control its contractions. Smooth muscle is slow to contract and relax, which allows for sustained contractions and helps with functions such as digestion and blood flow regulation. This characteristic is due to the presence of specialized proteins and regulatory mechanisms within smooth muscle cells.Rate this question:
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- 16.
Cardiac muscle is
- A.
Under voluntary control.
- B.
Slow to contract and relax.
- C.
Self-exciting.
- D.
Attached to bones.
Correct Answer
C. Self-exciting.Explanation
Cardiac muscle is self-exciting, meaning it can generate its own electrical impulses without external stimulation. This is essential for the heart to maintain its regular rhythm and function properly. Unlike skeletal muscle, which is under voluntary control, cardiac muscle contracts and relaxes involuntarily. Additionally, cardiac muscle is not attached to bones like skeletal muscle, and it contracts and relaxes at a slower pace compared to skeletal muscle.Rate this question:
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- 17.
Which of the following produces body movement?
- A.
Skeletal and cardiac muscle
- B.
Smooth muscle.
- C.
Smooth and skeletal muscle
- D.
Skeletal muscle.
Correct Answer
D. Skeletal muscle.Explanation
Skeletal muscle is responsible for body movement. It is attached to the bones and allows us to perform voluntary movements such as walking, running, and lifting objects. Cardiac muscle is found in the heart and is responsible for pumping blood, while smooth muscle is found in the walls of organs and helps with involuntary movements such as digestion and blood vessel constriction. Therefore, the correct answer is skeletal muscle.Rate this question:
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- 18.
____ muscle moves contents through an organ and controls blood vessels.
- A.
Cardiac muscle
- B.
Smooth muscle
- C.
Smooth and skeletal muscle
- D.
Skeletal muscle.
Correct Answer
B. Smooth muscleExplanation
Smooth muscle is the correct answer because it is responsible for moving contents through organs and controlling blood vessels. Smooth muscle is found in the walls of organs such as the stomach, intestines, and blood vessels. It is involuntary, meaning it functions without conscious control. Smooth muscle contracts and relaxes to help propel substances through the digestive system and regulate blood flow in the body.Rate this question:
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- 19.
Which of the following are characteristic of cardiac muscle?
- A.
It is under voluntary control and has intercalated disc.
- B.
It is self-exciting and controls blood vessels.
- C.
It is slow to contract and relax and is under voluntary control.
- D.
It has intercalated disc and self-exciting.
Correct Answer
D. It has intercalated disc and self-exciting.Explanation
Cardiac muscle is not under voluntary control, so the options that mention voluntary control can be eliminated. Additionally, cardiac muscle does not control blood vessels, so the option that mentions this can also be eliminated. The remaining option, "it has intercalated disc and self-exciting," is correct. Cardiac muscle does indeed have intercalated discs, which allow for synchronized contraction, and it is self-exciting, meaning it can generate its own electrical impulses to initiate contraction.Rate this question:
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- 20.
_____ is a protein that stores phosphate groups for use by ATP.
- A.
Glucose
- B.
Lactic acid
- C.
Creatine phosphate
- D.
Pyruvic acid.
Correct Answer
C. Creatine phosphateExplanation
Creatine phosphate is a protein that stores phosphate groups for use by ATP. ATP is the main energy source for cells, and it releases energy when it breaks down into ADP and inorganic phosphate. Creatine phosphate helps replenish ATP levels by donating its phosphate group to ADP, converting it back into ATP. This process is especially important during short bursts of intense physical activity, such as weightlifting or sprinting, where ATP demand is high. Creatine phosphate acts as a readily available source of phosphate groups, allowing for rapid ATP regeneration and sustained energy production.Rate this question:
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- 21.
Which of these uses glucose to help make ATP?
- A.
Creatine phosphate
- B.
Aerobic respiration
- C.
Lactic acid production
- D.
Pyruvic acid
Correct Answer
B. Aerobic respirationExplanation
Aerobic respiration is the process in which glucose is broken down in the presence of oxygen to produce ATP. This process occurs in the mitochondria of cells and is the most efficient way to generate ATP. It involves a series of chemical reactions that convert glucose into carbon dioxide and water, releasing energy that is captured in the form of ATP. This process is used by most organisms, including humans, to meet their energy needs.Rate this question:
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- 22.
Small amounts of ATP is produced when pyruvic acid is converted to
- A.
Creatine phosphate.
- B.
Glucose.
- C.
Lactic acid.
- D.
Myoglobin.
Correct Answer
C. Lactic acid.Explanation
During anaerobic respiration, pyruvic acid is converted into lactic acid in the absence of oxygen. This process occurs in the cytoplasm of cells and is known as lactic acid fermentation. It is a way for cells to produce ATP (energy) when oxygen is not readily available. This process is commonly observed in muscle cells during intense exercise or when there is a lack of oxygen supply. Therefore, the conversion of pyruvic acid to lactic acid results in the production of small amounts of ATP.Rate this question:
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- 23.
Individual muscle cells are surrounded by
- A.
Tendon
- B.
Aponeurosis
- C.
Perimysium
- D.
Endomysium
Correct Answer
D. EndomysiumExplanation
The correct answer is endomysium. Endomysium is a connective tissue that surrounds individual muscle cells. It provides support and protection to the muscle fibers, as well as allows for the transmission of force generated by the muscle cells. Tendon is a connective tissue that attaches muscle to bone, aponeurosis is a broad, flat tendon-like structure, and perimysium is a connective tissue that surrounds bundles of muscle fibers called fascicles. However, none of these options specifically surround individual muscle cells like the endomysium does.Rate this question:
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- 24.
Which of the following separates muscles from each other?
- A.
Tendon
- B.
Fascia
- C.
Perimysium
- D.
Endomysium
Correct Answer
C. PerimysiumExplanation
The perimysium is a connective tissue layer that surrounds and separates individual muscle fascicles. It helps to organize and support the muscle fibers within each fascicle, keeping them separate from one another. This allows for efficient muscle contraction and movement, preventing the muscles from sticking together or interfering with each other's function. Tendons connect muscles to bones, fascia is a connective tissue that surrounds muscles and other structures, and endomysium is a connective tissue layer that surrounds individual muscle fibers within a fascicle.Rate this question:
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- 25.
For which of the following is the use of braces an appropriate treatment?
- A.
Fibromyalgia
- B.
Muscular dystrophies
- C.
Tetanus
- D.
Botulism
Correct Answer
B. Muscular dystrophiesExplanation
Muscular dystrophies is a group of genetic disorders that cause progressive muscle weakness and degeneration. Braces can be used as a treatment option for individuals with muscular dystrophies to provide support and stability to the affected muscles, improve mobility, and delay the progression of the disease. Braces can help maintain proper body alignment, prevent contractures, and assist with walking and other activities of daily living. Fibromyalgia, tetanus, and botulism are not conditions that typically require the use of braces for treatment.Rate this question:
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- 26.
You should recommend lifestyle changes to avoid stress for patients who have
- A.
Muscular dystrophies.
- B.
Tetanus and myasthenia gravis.
- C.
Rhabdomyolysis and botulism
- D.
Myasthenia gravis and fibromyalgia
Correct Answer
D. Myasthenia gravis and fibromyalgiaExplanation
Patients with myasthenia gravis and fibromyalgia should be recommended lifestyle changes to avoid stress. Both myasthenia gravis and fibromyalgia are chronic conditions that can be exacerbated by stress. Stress can worsen symptoms such as muscle weakness and fatigue in myasthenia gravis, and it can also trigger flare-ups and increase pain in fibromyalgia. Therefore, lifestyle changes such as practicing relaxation techniques, engaging in regular exercise, getting enough sleep, and managing workload and responsibilities can help reduce stress levels and improve the overall well-being of these patients.Rate this question:
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- 27.
Antibiotics would be given for
- A.
Fibromyalgia.
- B.
Botulism.
- C.
Myasthenia gravis.
- D.
Rhabdomyolysis.
Correct Answer
B. Botulism.Explanation
Antibiotics would be given for botulism because it is a bacterial infection caused by the toxin produced by Clostridium botulinum. Antibiotics are used to treat the infection and prevent further complications. Fibromyalgia, myasthenia gravis, and rhabdomyolysis are not caused by bacterial infections, so antibiotics would not be effective in treating these conditions.Rate this question:
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- 28.
Which symptoms are unique to trichinosis?
- A.
Diarrhea and encephalitis
- B.
Dark urine and diarrhea
- C.
Tender body areas
- D.
Absence of reflexes
Correct Answer
A. Diarrhea and encephalitisExplanation
Trichinosis is a parasitic infection caused by eating undercooked meat infected with the Trichinella parasite. Diarrhea is a symptom commonly associated with gastrointestinal infections, including trichinosis. Encephalitis, on the other hand, is a rare but severe complication of trichinosis that occurs when the parasite invades the central nervous system. Therefore, the symptoms of diarrhea and encephalitis are unique to trichinosis compared to the other options listed.Rate this question:
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- 29.
An attachment site that does not move when a muscle contracts is a(n)
- A.
Insertion.
- B.
Origin.
- C.
Prime mover
- D.
Synergist
Correct Answer
B. Origin.Explanation
The origin refers to the attachment site of a muscle that remains fixed or does not move when the muscle contracts. This is in contrast to the insertion, which is the attachment site that moves when the muscle contracts. The prime mover refers to the muscle primarily responsible for producing a specific movement, while a synergist is a muscle that assists the prime mover in producing the movement. However, in this context, the correct answer is origin because it specifically refers to an attachment site that does not move during muscle contraction.Rate this question:
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- 30.
Which muscle is most responsible for movement?
- A.
Insertion
- B.
Origin
- C.
Prime mover
- D.
Synergist
Correct Answer
C. Prime moverExplanation
The prime mover muscle is the one that is primarily responsible for producing a specific movement. It is the muscle that contracts and generates the most force to initiate and carry out the desired movement. While other muscles may also contribute to the movement as synergists, the prime mover muscle is the main muscle that drives the action.Rate this question:
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- 31.
Which muscle stabilizes a joint during movement?
- A.
Insertion
- B.
Origin
- C.
Prime mover
- D.
Synergist
Correct Answer
D. SynergistExplanation
A synergist muscle is responsible for stabilizing a joint during movement. It works together with the prime mover muscle to provide support and control to the joint, ensuring smooth and coordinated movement. While the prime mover is the main muscle responsible for generating the movement, the synergist assists by providing stability and preventing unwanted or excessive movements at the joint.Rate this question:
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- 32.
Which of the following muscles moves the thigh?
- A.
Biceps brachii
- B.
External oblique
- C.
Gluteus medius
- D.
Gastrocnemius
Correct Answer
C. Gluteus mediusExplanation
The gluteus medius is a muscle that is responsible for moving the thigh. It is located in the buttocks and helps to abduct and rotate the thigh. The biceps brachii is a muscle in the arm that flexes the elbow joint, the external oblique is a muscle in the abdomen that aids in trunk rotation, and the gastrocnemius is a muscle in the calf that helps to flex the foot.Rate this question:
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- 33.
Which muscle moves the jaw?
- A.
Temporalis
- B.
Sternocleidomastoid
- C.
Trapezius
- D.
Biceps brachii
Correct Answer
A. TemporalisExplanation
The temporalis muscle is responsible for moving the jaw. It is a large, fan-shaped muscle located on the side of the head, above the ear. The temporalis muscle works in conjunction with other muscles to allow for the opening, closing, and side-to-side movement of the jaw. It is one of the key muscles involved in chewing and biting.Rate this question:
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- 34.
Which of these flexes the foot and is commonly called the calf muscle?
- A.
Biceps brachii
- B.
External oblique
- C.
Gluteus medius
- D.
Gastrocnemius
Correct Answer
D. GastrocnemiusExplanation
The muscle that flexes the foot and is commonly called the calf muscle is the gastrocnemius. This muscle is located in the back of the lower leg and plays a major role in walking, running, and jumping. It is responsible for pointing the toes downward and provides power for pushing off the ground during movement.Rate this question:
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- 35.
The ____ muscle moves the abdominal wall.
- A.
Biceps brachii
- B.
External oblique
- C.
Gluteus medius
- D.
Gastrocnemius
Correct Answer
B. External obliqueExplanation
The external oblique muscle is responsible for moving the abdominal wall. It is located on the sides and front of the abdomen and plays a key role in trunk rotation and flexion. When contracted, it helps to compress the abdominal contents and stabilize the core. The biceps brachii, gluteus medius, and gastrocnemius muscles are not involved in moving the abdominal wall.Rate this question:
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