NPB 101 QUESTIONS AND ANSWERS

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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