If the Connection Between the SA Node and AV Node

question 85

Multiple Choice

If the connection between the SA node and AV node becomes blocked,

• A) the ventricles will beat faster.
• B) the ventricles will beat more slowly.
• C) the ventricular beat will remain unchanged.
• D) cardiac output will increase.
• E) the atria will contract more forcefully.

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Definitions:

Nucleus

The central part of an atom containing protons and neutrons or the control center of a cell containing the cell's DNA.

Chromosomes

Thread-like structures located inside the nucleus of animal and plant cells, made of protein and a single molecule of deoxyribonucleic acid (DNA).

Axons

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

Dendrites

Extensions of a neuron that receive signals from other neurons and transmit them towards the cell body.