NPB 101 QUESTIONS AND ANSWERS
1. 1. The specialized region of the sarcolemma at the neuromuscular junction is
called the
A. syncytium.
B. varicosity.
C. fascicle.
D. motor end plate.- Answers - D. motor end plate.
2. 2. Somatic motor neurons release the neurotransmitter
at the neu- romuscular junction.
A. dopamine
B. acetylcholine
C. norepinephrine
D. serotonin- Answers - B. acetylcholine
3. 3. Each somatic motor neuron and all the muscle fibers it innervates is called
a
A. fascicle.
B. varicosity.
C. motor unit.
D. sarcolemma.- Answers - C. motor unit.
4. 4. What structures carry the action potentials into the interior of the muscle
to cause muscle contraction?
A. T tubules
B. terminal cisternae
C. sarcoplasmic reticula
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, D. ryanodine receptors- Answers - A. T tubules
5. 5. Thin filaments are composed of myosin and tropomyosin.
A. TRUE
B. FALSE- Answers - B. FALSE
6. 6. Subunits of skeletal muscle cells that are composed of sarcomeres
are called
A. myofibrils.
B. myofilaments.
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1. 1. The specialized region of the sarcolemma at the neuromuscular junction is
called the
A. syncytium.
B. varicosity.
C. fascicle.
D. motor end plate.- Answers - D. motor end plate.
2. 2. Somatic motor neurons release the neurotransmitter
at the neu- romuscular junction.
A. dopamine
B. acetylcholine
C. norepinephrine
D. serotonin- Answers - B. acetylcholine
3. 3. Each somatic motor neuron and all the muscle fibers it innervates is called
a
A. fascicle.
B. varicosity.
C. motor unit.
D. sarcolemma.- Answers - C. motor unit.
4. 4. What structures carry the action potentials into the interior of the muscle
to cause muscle contraction?
A. T tubules
B. terminal cisternae
C. sarcoplasmic reticula
1/
12
, D. ryanodine receptors- Answers - A. T tubules
5. 5. Thin filaments are composed of myosin and tropomyosin.
A. TRUE
B. FALSE- Answers - B. FALSE
6. 6. Subunits of skeletal muscle cells that are composed of sarcomeres
are called
A. myofibrils.
B. myofilaments.
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12
