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Question 1

What is homeostasis?

Answer 1

The need of an organism to stay stable in internal conditions by regulating them.

Homeostasis involves a dynamic equilibrium where conditions are maintained within a range.

Question 2

What is a stimulus?

Answer 2

A change in the environment.

Stimuli can affect the internal conditions of an organism.

Question 3

What is a response in the context of homeostasis?

Answer 3

A change in the organism in reaction to a stimulus.

Responses are crucial for maintaining homeostasis.

Question 4

What do feedback mechanisms do?

Answer 4

They use the output of a system to signal a change in input to stabilize or amplify the system response.

Feedback mechanisms can be either positive or negative.

Question 5

What is a positive feedback mechanism?

Answer 5

A feedback loop where the output intensifies the response.

Examples include human childbirth and fruit ripening.

Question 6

Provide an example of a positive feedback mechanism.

Answer 6

Human childbirth and fruit ripening.

In childbirth, hormones trigger contractions, which increase pressure and lead to more hormone release.

Question 7

What is a negative feedback mechanism?

Answer 7

A feedback loop where the output causes a counter response to return to a set point.

This mechanism is crucial for regulating various bodily functions.

Question 8

Provide an example of a negative feedback mechanism.

Answer 8

Thermoregulation in the human body, osmoregulation, and blood sugar regulation.

These mechanisms help maintain stable internal conditions.

Question 9

Fill in the blank: In a positive feedback loop, the output of a system ______ the response.

Answer 9

intensifies

This leads to a greater effect and can result in rapid changes.

Question 10

Fill in the blank: In a negative feedback loop, the output of a system causes a ______ response.

Answer 10

counter

This response aims to return the system to its set point.