6. · Which of the following statements · are correct regarding structure and function of the neuromuscular junction?T + a) The axon of each motor neuron divides as it enters the muscle with each of...

please answer 6 7 8

Extracted text: 6. · Which of the following statements · are correct regarding structure and function of the neuromuscular junction?T + 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. T + b) Membranes of axonal endings and the sarcolemma of the muscle fiber do not touch but are - separated by a synaptic cleft. T + ) 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. T + e) All of the above (a, b, c and d) are correct. T 7. During muscle activity, the fastest way of regenerating ATP is: T + a) anaerobic glycolysisT + b) direct phosphorylation via a coupled reaction of creatine phosphate and ADPT + ) aerobic respiration (oxidative phosphorylation) T + d) new synthesis of ADP T 8. Which of the following statements is correct with regard to smooth muscle but not skeletal muscle.T 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. T + b) Both smooth and skeletal muscle is under voluntary control by the nervous system. T + c) Smooth muscle and skeletal muscle are not composed of individual cells but the cells fuse to form a multinucleate syncytium. T + d) All of the above (a, b, c and d) are correct. T