Which hormone is glucagon's main antagonist?

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A. Insulin B. Cortisol C. Adrenaline D. Thyroxine

Correct Answer: A

Rationale: insulin as glucagon's antagonist ; cortisol , adrenaline , and thyroxine have other roles.

Andrea is flushed and her teeth are chattering even though her bedroom temperature is 72°F (22.22°C). Why do you think this is happening?

A. She's cold B. She has a fever C. She's exercising D. She's dehydrated

Correct Answer: B

Rationale: Andrea's symptoms (flushing, chattering) as fever from a raised hypothalamic set point ; not cold , exercise , or dehydration .

What is catabolism?

A. The building up of compounds B. The breaking down of compounds C. The conversion of energy to food D. The storage of compounds

Correct Answer: B

Rationale: Catabolism is the metabolic process that breaks down complex molecules into simpler ones, releasing energy.

What is the result of anabolic reactions?

A. The breaking down of compounds B. The building up of compounds C. The conversion of energy to waste D. The storage of energy

Correct Answer: B

Rationale: Anabolic reactions synthesize larger molecules from smaller ones, building compounds like proteins.

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