When the Heart Rhythm Speeds Up or Slows Down, Which

question 4

Multiple Choice

When the heart rhythm speeds up or slows down, which phase of cardiac cycle is affected more than others?

• A) passive ventricular filling
• B) atrial contraction
• C) isovolumetric ventricular contraction
• D) ventricular ejection
• E) isovolumetric ventricular relaxation

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Definitions:

Lobes

Divisions of the brain or other organs marked by natural boundaries, such as the frontal, parietal, temporal, and occipital lobes of the brain.

Myelin Sheath

A fatty layer that surrounds nerve fibers, providing insulation and increasing the speed at which electrical impulses propagate along the nerve cells.

Axons

Long, slender projections of nerve cells that transmit electrical impulses away from the neuron's cell body.

Cells

The basic structural, functional, and biological units of all living organisms, serving as the building blocks of life.