Question
Nervous stimulation of musclesa. occurs at a neuromuscular junction.b. involves the release of ACh.c. results in impulses that travel down the T system.d. causes calcium to be released from the sarcoplasmic reticulum.e. All of these are correct
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This is where the motor neuron and muscle fiber meet. This is represented by option (a). Show more…
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Nervous stimulation of muscles a. occurs at a neuromuscular junction. b. results in an impulse that travels down the T system. c. causes calcium to be released from expanded regions of the sarcoplasmic reticulum. d. All of these are correct.
Excitation-Contraction Coupling: During the action potential in a cardiac contractile cell: a) Calcium ions enter the cell through voltage-gated calcium channels and bind to Ryanodine receptor-channels. b) Calcium ions enter the sarcoplasm through Ryanodine receptor-channels and bind to troponin. c) Calcium is pumped out of the cell into the ECF by primary active transport. d) Both a) and b) are correct, and c) is incorrect. e) a), b), and c) are all correct.
Inadequate calcium in the neuromuscular junction would directly affect which of the following processes? a. Release of acetylcholine from the synaptic vesicles b. Breakdown of acetylcholine by acetylcholinesterase c. Depolarization of the junctional folds d. Conduction of action potentials by the motor neuron
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