Biology Unit 1.2

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

Front

What is dynamic equilibrium?

Back

Dynamic equilibrium refers to a state of balance within a system where opposing processes occur at equal rates, allowing the system to remain stable.

Front

What happens to red blood cells in a hypertonic solution?

Back

In a hypertonic solution, red blood cells lose water and shrink, appearing wrinkled.

Front

What is the tonicity of a solution that causes no net movement of water into or out of a cell?

Back

Isotonic.

Front

What is passive transport?

Back

Passive transport is the movement of particles across a cell membrane from an area of high concentration to an area of low concentration without the use of energy.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy.

Front

What is a capillary?

Back

Capillaries are small blood vessels that connect arteries and veins, allowing for the exchange of oxygen, carbon dioxide, nutrients, and waste between blood and tissues.

Front

What role do capillaries play in thermoregulation?

Back

Capillaries can dilate to increase blood flow to the skin, allowing heat to dissipate and helping to cool the body during strenuous exercise.

Front

What is the significance of sweating in maintaining homeostasis?

Back

Sweating helps cool the body by evaporating moisture from the skin, which removes heat and helps regulate body temperature.

Front

What is the role of feedback mechanisms in homeostasis?

Back

Feedback mechanisms help maintain homeostasis by detecting changes in the internal environment and initiating responses to counteract those changes.