This Structure in the Heart Initiates Action Potentials That Stimulate

question 15

Multiple Choice

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

• A)Cardiac accelerator nerves
• B)Atrioventricular node
• C)Cardiovascular center
• D)Sinoatrial node
• E)Bundle of His

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Definitions:

Leptin

A hormone produced by fat cells that helps to regulate body weight by inhibiting hunger and thereby reducing food intake.

Insulin

A substance secreted by the pancreas that controls levels of sugar in the blood by aiding in the absorption of glucose into the body's tissues.

Oxytocin

A hormone and neurotransmitter often called the "love hormone" for its role in social bonding, childbirth, and maternal behaviors.

Childhood Obesity

A medical condition involving an excess of body fat in individuals under the age of 18, often leading to various health risks.