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Which Structure in the Heart Initiates Action Potentials That Stimulate

question 56

Multiple Choice

Which structure in the heart initiates action potentials that stimulate contraction of the heart at constant rate of about 100 beats per minute?


Definitions:

Mammary Glands

The breasts.

Prolactin

A hormone produced by the pituitary gland that stimulates breast milk production following childbirth.

Acromegaly

A chronic condition characterized by enlargement of bones of the extremities and some bones of the head; thickening of facial soft tissues.

Cartilaginous

Pertaining to or composed of cartilage, a flexible connective tissue found in various parts of the body.

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