Neuromuscular System

Question 1

Which of the following parts and divisions of the nervous system is correctly paired?

Answer 1

Autonomic division/ peripheral nervous system.

Question 2

Which of the following incorrectly describes neurons?

Answer 2

Sensory neurons carry information away from the brain.

Question 3

Which of the following is correct about muscle contraction?

Answer 3

Actin and myosin filaments slide past each other.
Neurotransmitters stimulate muscle contraction.
Muscle contraction requires ATP.
Sarcomere shorten during contraction.

Question 4

What is the role of the myelin sheath in the nervous system?

Answer 4

Insulate axons.

Question 5

Which of the following parts of the brain is responsible for posture, balance and movement coordination?

Answer 5

Cerebellum.

Question 6

Which of the following is the basic contractile unit of the skeletal muscle

Answer 6

Sarcomere.

Question 7

Skeletal muscle contraction is stimulated by the release of which neurotransmitter at the neuromuscular junction?

Answer 7

Acetylcholine.

Question 8

Which of the following structures divide and multiply in cases of injury or disease?

Answer 8

Glial cells.

Question 9

Which of the following describes the role of acetylcholine in muscle contraction?

Answer 9

Acetylcholine binds to the membrane receptor in the sarcolemma and facilitates opening of the sodium channels.

Question 10

Dopamine is one of the neurotransmitters in the nervous system. What happens when dopamine is released into the nerve synapse?

Answer 10

Binding of dopamine to the membrane receptor of the postsynaptic cell.

Question 11

Which of the following types of muscles are involuntary?

Answer 11

Cardiac and visceral.

Question 12

Which of the following functional types of nerves is correctly paired with the impulse it carries?

Answer 12

Afferent/ carry stimulus towards the central nervous system.

Question 13

Which of the following refers to the process of nerve stimulation wherein the action potential is generated through several stimulations released in rapid succession by a single source?

Answer 13

Temporal summation.

Question 14

Which of the following parts of neurons is correctly paired with its function?

Answer 14

Axon / sends stimulus to axon terminal.

Question 15

Which of the following correctly pairs an action with the nervous system that controls it?

Answer 15

Digestion/ autonomic.

Question 16

The sympathetic division of the autonomic nervous system is primarily responsible for stimulating activities that would increase alertness during periods of stress and anxiety. Which of the following activities is not a sympathetic response?

Answer 16

Increase in salivation.

Question 17

Which of the following disorders is caused by the degenerative demyelination of motor neurons resulting in dysfunction of voluntary muscles?

Answer 17

Amyotrophic lateral sclerosis.

Question 18

Transecting injuries to the spinal cord will have detrimental effect to which of the following?

Answer 18

Somatic and autonomic systems.

Question 19

Which of the following does not describe a sarcomere?

Answer 19

It completely surrounds the muscle fiber.

Question 20

Which of the following is incorrect about muscle contraction?

Answer 20

Actin and myosin filaments shorten during contraction.

Question 21

Which division of the nervous system facilitates muscle contraction?

Answer 21

Somatic division.

Question 22

During contraction, thin ________ filaments slide past the thick ________ filaments which result to shortening of sarcomere and contraction of the muscle.

Answer 22

Actin/myosin.

Question 23

Which of the following is true about the role of ATP in muscle contraction and relaxation?

Answer 23

ATP is needed for both the relaxation and contraction of muscle.

Question 24

Which of the following is the thick contractile protein found in the sarcomere?

Answer 24

Myosin.

Question 25

Which of the following is the result of demyelination?

Answer 25

Disrupted propagation of action potential along the axon.