Which of the Following Ions Is Most Likely to Cross

question 12

Multiple Choice

Which of the following ions is most likely to cross the plasma membrane of a resting neuron?

• A)K⁺
• B)Na⁺
• C)Ca²⁺
• D)Cl⁻
• E)Mg²⁺

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Definitions:

Warm Blood

Refers to endothermic animals that regulate their body temperature through internal metabolic processes.

Metabolism

The set of life-sustaining chemical reactions in organisms that allow for the growth, reproduction, maintenance of health, and response to environments, typically involving energy release and consumption.

Neuromuscular Junction

The synapse or junction where the motor neuron communicates with the skeletal muscle fiber to initiate muscle contraction.

Synaptic Vesicles

Membrane-bound sacs within a nerve cell (neuron) that contain neurotransmitters, which are released into the synaptic cleft to transmit signals between neurons.