dings forming a neuromuscular junction with a single muscle fiber. Membranes of axonal endings and the sarcolemma of the muscle fiber do not touch but are - parated by a synaptic cleft. T Neurotransmitter molecules are stored in the axonal endings in membrane-bound synaptic sicles. Initiation of an action potential in the muscle cell membrane is the result of depolarization the sarcolemma due to opening of Na+ channels and Na+ entering the cell. T All of the above (a, b, c and d) are correct.T muscle activity, the fastest way of regenerating ATP is:T anaerobic glycolysis™ direct phosphorylation via a coupled reaction of creatine phosphate and ADPT aerobic respiration (oxidative phosphorylation) T new synthesis of ADP T

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
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please answer 6 7 8

6. Which of the following statements are correct regarding the structure and function of the neuromuscular junction?
   - a) The axon of each motor neuron divides as it enters the muscle with each of the axonal endings forming a neuromuscular junction with a single muscle fiber.
   - b) Membranes of axonal endings and the sarcolemma of the muscle fiber do not touch but are separated by a synaptic cleft.
   - c) Neurotransmitter molecules are stored in the axonal endings in membrane-bound synaptic vesicles.
   - d) Initiation of an action potential in the muscle cell membrane is the result of depolarization of the sarcolemma due to opening of Na+ channels and Na+ entering the cell.
   - e) All of the above (a, b, c, and d) are correct.

7. During muscle activity, the fastest way of regenerating ATP is:
   - a) Anaerobic glycolysis
   - b) Direct phosphorylation via a coupled reaction of creatine phosphate and ADP
   - c) Aerobic respiration (oxidative phosphorylation)
   - d) New synthesis of ADP

8. Which of the following statements is correct with regard to smooth muscle but not skeletal muscle?
   - a) Smooth muscle cells are capable of undergoing hyperplasia (increase in cell numbers by cell division) while skeletal muscle cells are post-mitotic and do not divide.
   - b) Both smooth and skeletal muscle is under voluntary control by the nervous system.
   - c) Smooth muscle and skeletal muscle are not composed of individual cells but the cells fuse to form a multinucleate syncytium.
   - d) All of the above (a, b, c, and d) are correct.
Transcribed Image Text:6. Which of the following statements are correct regarding the structure and function of the neuromuscular junction? - a) The axon of each motor neuron divides as it enters the muscle with each of the axonal endings forming a neuromuscular junction with a single muscle fiber. - b) Membranes of axonal endings and the sarcolemma of the muscle fiber do not touch but are separated by a synaptic cleft. - c) Neurotransmitter molecules are stored in the axonal endings in membrane-bound synaptic vesicles. - d) Initiation of an action potential in the muscle cell membrane is the result of depolarization of the sarcolemma due to opening of Na+ channels and Na+ entering the cell. - e) All of the above (a, b, c, and d) are correct. 7. During muscle activity, the fastest way of regenerating ATP is: - a) Anaerobic glycolysis - b) Direct phosphorylation via a coupled reaction of creatine phosphate and ADP - c) Aerobic respiration (oxidative phosphorylation) - d) New synthesis of ADP 8. Which of the following statements is correct with regard to smooth muscle but not skeletal muscle? - a) Smooth muscle cells are capable of undergoing hyperplasia (increase in cell numbers by cell division) while skeletal muscle cells are post-mitotic and do not divide. - b) Both smooth and skeletal muscle is under voluntary control by the nervous system. - c) Smooth muscle and skeletal muscle are not composed of individual cells but the cells fuse to form a multinucleate syncytium. - d) All of the above (a, b, c, and d) are correct.
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