The body’s ability to maintain a stable internal environment despite changes in external conditions.

A control mechanism that reduces or shuts off the original stimulus to maintain homeostasis (e.g., body temperature regulation).

A response mechanism that enhances the original stimulus (e.g., blood clotting or childbirth).

A selectively permeable barrier that surrounds the cell and controls what enters and exits.

Organelles known as the “powerhouse of the cell” that produce ATP through cellular respiration.

What is the main function of the nervous system?

To send, receive, and process nerve impulses throughout the body to coordinate actions.

A rapid electrical signal that travels along the axon of a neuron to transmit information.

The passive movement of molecules from an area of high concentration to low concentration.

The movement of water across a semipermeable membrane from a region of low solute concentration to high solute concentration.

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Physiology Set 1

Content covered in weeks 1-6

Question	Answer
Homeostasis	The body’s ability to maintain a stable internal environment despite changes in external conditions.
Negative Feedback	A control mechanism that reduces or shuts off the original stimulus to maintain homeostasis (e.g., body temperature regulation).
Positive Feedback	A response mechanism that enhances the original stimulus (e.g., blood clotting or childbirth).
Cell Membrane	A selectively permeable barrier that surrounds the cell and controls what enters and exits.
Mitochondria	Organelles known as the “powerhouse of the cell” that produce ATP through cellular respiration.
What is the main function of the nervous system?	To send, receive, and process nerve impulses throughout the body to coordinate actions.
Action Potential	A rapid electrical signal that travels along the axon of a neuron to transmit information.
Diffusion	The passive movement of molecules from an area of high concentration to low concentration.
Osmosis	The movement of water across a semipermeable membrane from a region of low solute concentration to high solute concentration.
The ______ system is responsible for transporting oxygen, nutrients, and hormones throughout the body.	Circulatory

Created by: Chassirae2263

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