Examlex
The bundle of His forms a part of the ________ system of the heart.
Voltage-Gated Channels
Protein channels in cell membranes that open or close in response to changes in membrane voltage, crucial for nerve impulse transmission.
Exocytosis
The process by which cells transport molecules out of the cell by the fusion of vesicles with the plasma membrane.
Presynaptic Terminal
The end point of a neuron where it connects to another neuron or muscle cell, releasing neurotransmitters to transmit nerve impulses.
Acetylcholine
A neurotransmitter involved in muscle activation and various functions in the central and peripheral nervous system, including memory and arousal.
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