Examlex
All spinal nerves are mixed nerves containing both sensory and motor fibers.
Neurotransmitter
Chemical substances released at the end of a nerve fiber by the arrival of a nerve impulse, which by diffusing across the synapse or junction causes the transfer of the impulse to another nerve fiber, a muscle fiber, or some other structure.
T-tubule
Tubular extensions of the cell membrane in muscle cells, which play a critical role in the conduction of electrical signals for muscle contraction.
Action Potential
A short-lasting event in which the electrical membrane potential of a cell rapidly rises and falls, allowing nerve cells to communicate.
Contractile Organelle
A cell component that is involved in the contraction and movement processes, such as muscle fibers.
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