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AP Biology: The Endocrine System

Which of the following is an example of a positive feedback system?

Thirst

Heart rate

Hunger

Body's reaction to a fever

The hypothalamus serves to do all of the following EXCEPT

Connecting the endocrine and nervous system

Regulate blood glucose levels

Regulate release of reproductive hormones

Regulate body temperature

A Type-1 diabetes patient is unable to produce insulin. This would explain which of the following responses?

Rise in blood glucose

Decline in blood glucose

Equilibrium in blood glucose

Shortly after ingesting a big plate of carbohydrate-rich pasta, you measure your blood's hormone levles. What results would you expect, compared to before the meal?

High insulin, low glucagon

High insulin, high glucagon

Low insulin, low glucagon

Low insulin, high glucagon

Low insulin, no change in glucagon

An example of antagonistic hormones controlling homeostasis is

Thyroxine and parathyroid hormone in calcium balance

Insulin and glucagon in glucose metabolism

Progestins and estrogens in sexual differentiation

Epinephrine and norepinephrine in fight-or-flight responses

Oxytocin and prolactin in milk production

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