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

question 165

Multiple Choice

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⁺?

• A)in vesicles within the motor neuron
• B)in the cytosol of the motor neuron terminus
• C)in the synaptic cleft
• D)within the sarcoplasmic reticulum of the muscle fiber

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