You measure levels of Ca²⁺ in various locations within a motor neuron and a skeletal muscle fiber when the motor neuron is NOT depolarized, and the muscle fiber is at rest. Where do you expect to find high levels of Ca²⁺?

Question

Quizplus · Accepted Answer

Ca²⁺ is stored within the sarcoplasmic reticulum of the muscle fiber and is released in response to depolarization of the motor neuron. When the motor neuron is not depolarized and the muscle fiber is at rest, the levels of Ca²⁺ are expected to be high within the sarcoplasmic reticulum.

You Measure Levels of Ca2+ in Various Locations Within a Motor

You Measure Levels of Ca²⁺ in Various Locations Within a Motor