Most of the Neurons in the Human Central Nervous System

question 35

Multiple Choice

Most of the neurons in the human central nervous system are ________.

• A) sensory neurons
• B) motor neurons
• C) interneurons
• D) peripheral neurons

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Definitions:

Action Potential

A rapid, temporary change in the electrical potential across a cell membrane, leading to the transmission of an electrical impulse along the neuron or muscle cell.

T Tubule

Tubular extensions of the plasma membrane in muscle cells that penetrate into the cell's interior, crucial for transmitting the action potential to trigger muscle contraction.

Calcium Ions

Positively charged ions (Ca2+) essential for various cellular processes, including muscle contraction, nerve function, and blood clotting.

Sarcoplasmic Reticulum

The sarcoplasmic reticulum is a specialized type of smooth endoplasmic reticulum in muscle cells, involved in the regulation of calcium ion concentrations.