The Normal Pacemaker of the Heart Is the

question 68

Multiple Choice

The normal pacemaker of the heart is the

• A)sinus node.
• B)AV node.
• C)Purkinje fibers.
• D)coronary sinus.

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Definitions:

Cortisol

A steroid hormone produced by the adrenal gland, involved in the body's stress response as well as metabolism and immune response.

Adrenal Cortex

The outer region of the adrenal glands that produces steroid hormones vital for life, such as cortisol.

Aldosterone

A hormone produced by the adrenal glands that helps regulate blood pressure by balancing sodium and potassium levels.

Thymus Gland

An organ located in the upper chest, it plays a role in the development of the immune system in early life.