Which of the Following Is True of Circadian Rhythms

question 3

Multiple Choice

Which of the following is true of circadian rhythms?

• A) They are artificial inventions of timekeepers.
• B) They are internally driven cycles.
• C) They are sequences of events that occur once a month.
• D) They occur on the same schedule regardless of the changes from day to night.

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Definitions:

Semilunar Valves

Valves located at the exit of both the left and right ventricles of the heart, which prevent backflow of blood into the ventricles.

Ventricles

Ventricles are chambers within the heart that pump blood out to the lungs and the rest of the body, crucial for the cardiac circulation process.

Epinephrine

Hormone secreted by the adrenal medulla in times of stress; also referred to as adrenaline.

Norepinephrine

A neurotransmitter and hormone involved in the body's fight or flight response; it affects heart rate, blood pressure, and glucose levels.