The Primary Effect of the Normal Age-Related Changes in the Functioning

question 14

Multiple Choice

The primary effect of the normal age-related changes in the functioning of the heart is

• A)increased blood flow throughout the circulatory system.
• B)softer,thinner artery walls.
• C)higher heart rates during exercise.
• D)slower blood flow throughout the circulatory system.

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Definitions:

Second Messenger

A substance inside a cell that acts as a signal molecule in response to an external stimulus, transmitting the message initiated by the first messenger.

Neuroendocrine Signaling

Neuroendocrine cells produce neurohormones that are transported down axons and released into the interstitial fluid.

cAMP

Cyclic Adenosine Monophosphate, known as a secondary messenger, plays a crucial role in numerous biological functions, particularly in controlling metabolism.

Parathyroid Hormone

A hormone secreted by the parathyroid glands that regulates calcium levels in a person's body.