Unit 4: Topic 5 - Feedback Flashcards

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1
Q

What is homeostasis? Identify what mechanisms help regulate/affect it.

A

Homeostasis is when an internal environment is at equilibrium and stable. Negative and positive feedback mechanisms help regulate homeostasis.

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2
Q

What are the two types of feedback mechanisms and their different purposes?

A

The two types of feedback mechanisms are positive and negative. Positive feedback uses a product of a biological process as the amplified input to another. Negative feedback uses a product of a biological process to end the process. Both mechanisms aim to maintain the organism’s internal environment and respond to changes in their environments to achieve homeostasis.

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3
Q

What is an example of a negative feedback mechanism maintaining homeostasis at the cellular or molecular level?

A

Any example in which a process returns the system/organism back to normal/homeostasis. Some examples include temperature regulation, blood sugar regulation, and osmoregulation.

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4
Q

What is an example of a positive feedback mechanism affecting homeostasis at the cellular or molecular level?

A

Any example in which a process or response is amplified to initiate an additional response changing the system and moving it away from its equilibrium/homeostasis. Some examples include fruit ripening, blood clotting, and childbirth.

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