Infants with an Anxious and Inhibited Temperament Have Heart Rates

question 99

Multiple Choice

Infants with an anxious and inhibited temperament have heart rates that tend to be relatively

• A) low and variable.
• B) high and variable.
• C) low and invariable.
• D) high and invariable.

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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.