AP Biology Unit 4 Review: Cell Communication & Cycling

AP Biology Unit 4 Review: Cell Communication & Cycling

Assessment

Flashcard

Biology

9th - 12th Grade

Hard

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15 questions

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1.

FLASHCARD QUESTION

Front

What is glucagon and its role in the body?

Back

Glucagon is a hormone produced by the pancreas that promotes the breakdown of glycogen into glucose, increasing blood sugar levels, especially during low energy states.

2.

FLASHCARD QUESTION

Front

What triggers the release of glucagon?

Back

Low cellular ATP concentration triggers the release of glucagon, indicating that the body needs more energy.

3.

FLASHCARD QUESTION

Front

Define positive feedback in biological systems.

Back

Positive feedback is a process that amplifies a response or increases the output in a system, often leading to a specific outcome, such as the release of more hormones.

4.

FLASHCARD QUESTION

Front

Give an example of positive feedback in the human body.

Back

An example of positive feedback is the release of inflammatory cytokines by immune cells, which enhances the immune response.

5.

FLASHCARD QUESTION

Front

What is a negative feedback loop?

Back

A negative feedback loop is a control mechanism that counteracts changes in a system, helping to maintain homeostasis.

6.

FLASHCARD QUESTION

Front

How do mammals maintain a constant body temperature?

Back

Mammals use negative feedback loops to maintain a constant body temperature, adjusting physiological processes to counteract deviations.

7.

FLASHCARD QUESTION

Front

What occurs after metaphase in mitosis?

Back

After metaphase, the next phase in mitosis is anaphase, where sister chromatids are pulled apart to opposite poles of the cell.

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