What Is the Name of the Knot of Modified Myocardium

question 52

Multiple Choice

What is the name of the knot of modified myocardium that initiates and regulates the heartbeat?

• A) Medulla
• B) AV node
• C) SA node
• D) Bundle branches

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Definitions:

Shivering

An involuntary response to cold, involving rapid, rhythmic muscle contractions to generate heat and increase body temperature.

Muscle Tissue

Muscle tissue is a specialized tissue in animals designed to contract and produce force and movement.

Epithelial Tissues

Layers of cells that cover internal and external surfaces of the body, including skin, glands, and lining of organs, serving as protective barriers and involved in absorption and secretion.

Basement Membrane

The thin, non-cell layer of an epithelial membrane that attaches to the underlying tissues; consists of tiny fibers and polysaccharides produced by the epithelial cells.