Which Is True When Your Sympathetic Nervous System Is More

question 83

Multiple Choice

Which is true when your sympathetic nervous system is more active?

• A) The SA node depolarizes more rapidly.
• B) The myocardium repolarizes more rapidly.
• C) More Ca²⁺ becomes available and causes more forceful heart contractions.
• D) Norepinephrine is stimulating the heart.
• E) All of these.

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Definitions:

Stress Hormone

Hormones, such as cortisol, released in the body's response to stress, affecting various bodily functions.

Cortisol

A steroid hormone produced by the adrenal glands, often released in response to stress and low blood-glucose concentration.

Ghrelin

A hormone produced by the stomach that stimulates appetite, often termed the "hunger hormone."

Leptin

A hormone produced by fat cells that helps to regulate body weight by signaling satiety to the brain.