Examlex
Which of the following substances is a major component of cell membranes?
Neurotransmitters
Chemical messengers that transmit signals across a synapse from one neuron to another 'target' neuron, muscle cell, or gland cell.
Calcium Ion Influx
Calcium ion influx involves the movement of calcium ions (Ca2+) into a cell, triggering various physiological processes, including muscle contraction, neurotransmitter release, and gene expression.
Axon Terminal
The very end of a branch of a neuron's axon, a structure that releases neurotransmitters to signal other neurons.
Exocytosis
A process by which a cell transports secretory products through the cell membrane to the outside of the cell in vesicles.
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