Why Is PH Stability Important for Homeostasis

question 72

Multiple Choice

Why is pH stability important for homeostasis?

• A)There is no mechanism for buffering pH changes in blood.
• B)Excess H⁺ disrupts hydrogen bonds, thereby destroying the cohesion between water molecules.
• C)Buffers can only work properly within a narrow pH range.
• D)Most biological molecules function optimally only within a narrow pH range.
• E)Excess H⁺ facilitates hydrogen bonds, which disrupt the structural integrity of biological molecules.

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Definitions:

Smooth Muscle

Involuntary muscle found in the walls of internal organs such as the stomach, intestines, and blood vessels, controlling their movements.

Sympathetic Fibers

Nerve fibers that are part of the sympathetic nervous system, responsible for the body's "fight or flight" response by regulating heart rate, blood pressure, and other autonomic functions.

Spinal Cord

A long, thin, tubular bundle of nervous tissue and support cells that extends from the brainstem to the lumbar region, serving as the main pathway for information connecting the brain and peripheral nervous system.

First Thoracic

The first thoracic refers to the first vertebra of the thoracic spine, which is located in the upper back and helps support the ribcage.