When an action potential from a motor neuron arrives at the neuromuscular junction (NMJ), a series of events occurs that leads to muscle contraction. Which of the following events will occur last (that is, after all of the others listed below)?
a. depolarization of the muscle cell
b. release of Ca2+ from the sarcoplasmic reticulum
c. acetylcholine (ACh) release
d. conformational change in troponin
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In a classic experiment using pea shape, mendel conducted two separate genetic crosses. in the first cross the parent plants were “true breeding” for pea shape; one had round peas ( r )and the other had wrinkled (r). the first cross produced a filial 1 generation of all round peas. in the second cross, mendel bred plants from the filial 1 generation. this cross produced different results. out of approximately 1000 plants, about 75% were round and 25% were wrinkled.
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When an action potential from a motor neuron arrives at the neuromuscular junction (NMJ), a series o...
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