How Would the Heart Rate Be Affected If There Were

question 37

Multiple Choice

How would the heart rate be affected if there were a blockage of the AV node

• A)The heart rate would be unaffected.
• B)The heart rate would increase.
• C)The heart would cease to contract.
• D)The electrical stimuli from the SA node would be normal, but the rate of contraction would slow or be irregular.
• E)The heart rate would slow dramatically, and become extremely irregular, contracting only when the ventricles became overfilled.

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Definitions:

Organogenesis

The phase of embryonic development concerned with the formation of organs and organ systems.

Embryonic Development

The process by which an embryo forms and develops, involving cell division, growth, and differentiation.

Blastopore

The opening that forms during early embryonic development, which can develop into the mouth or the anus in animals.

Organogenesis

The process during embryonic development where organs form and develop from three germ layers: the endoderm, mesoderm, and ectoderm.