Acid-Base Balance Is Critical to Homeostasis and Cellular Function

question 26

Multiple Choice

Acid-base balance is critical to homeostasis and cellular function. One measurement of acid-base balance is the pH of the blood. Which ion is measured to determine the pH?

• A)Cl^-
• B)H⁺
• C)Na⁺
• D)HCO₃

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Definitions:

Signaling Molecules

Chemicals released by cells that communicate and coordinate actions across the body or between organisms, crucial in many biological processes.

Histamine

A compound released by cells in response to injury and in allergic and inflammatory reactions, causing contraction of smooth muscle and dilation of capillaries.

Prostaglandins

A group of physiologically active lipid compounds that have diverse hormone-like effects in animals.

Sensory Stimulus

An external or internal event or factor that initiates a sensory response in an organism, leading to a potential change in behavior or physiological state.