Examlex
On average, a first baby is born after _____ hours of active labor.
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.
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