Year 9 Biology 2023 Revision

Front

What is homeostasis?

Back

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

Front

Which organisms use homeostasis?

Back

All living things, including plants and animals, use homeostasis.

Front

What is the function of enzymes in biological processes?

Back

Enzymes speed up chemical reactions in the body.

Front

What happens to enzymes at high temperatures?

Back

Enzymes can denature, losing their shape and function when exposed to high temperatures.

Front

What are receptors?

Back

Receptors are specialized cells or proteins that detect stimuli and send signals to the nervous system.

Front

What is a stimulus?

Back

A stimulus is anything that causes a response in an organism.

Front

What is the role of the sensory system?

Back

The sensory system allows organisms to perceive and respond to their environment through senses like sight, sound, and touch.

Front

What is the response of shivering in cold environments?

Back

Shivering is a response that helps increase body temperature when the environment is cold.

Front

What is the difference between a response and a stimulus?

Back

A stimulus is an event that triggers a response, while a response is the reaction of an organism to that stimulus.

Front

What is the importance of feedback mechanisms in homeostasis?

Back

Feedback mechanisms help regulate physiological processes to maintain homeostasis.