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07 The Endocrine System Online Quiz Questions

Use this free practice quiz with 20 questions to review 07 The Endocrine System, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

Endocrine glands release hormones into the bloodstream rather than sending them through ducts.

  1. A

    True

  2. B

    False

02
Choose one
1 point

Which gland produces melatonin, a hormone that helps coordinate daily sleep–wake rhythms?

  1. A

    Pancreas

  2. B

    Pineal gland

  3. C

    Thyroid gland

  4. D

    Parathyroid glands

03
Written response
1 point

Which pancreatic hormone generally lowers blood glucose?

04
Fill in the blank
1 point

Growth hormone stimulates production of , especially in the liver.

05
Choose one
1 point

A hormone travels in the blood and reaches many cells. Which cells can respond to that hormone?

  1. A

    Every cell that the hormone passes

  2. B

    Only cells located near the gland that released it

  3. C

    Cells with a compatible receptor

  4. D

    Only cells that produce the same hormone

06
Choose all
1 point

Select all statements that correctly describe how insulin and glucagon help regulate blood glucose.

  1. A

    Insulin generally raises blood glucose.

  2. B

    Insulin generally lowers blood glucose.

  3. C

    Glucagon generally lowers blood glucose.

  4. D

    Glucagon generally raises blood glucose.

07
True or false
1 point

Oxytocin and antidiuretic hormone are made in the hypothalamus and released by the posterior pituitary.

  1. A

    True

  2. B

    False

08
Written response
1 point

What hormone raises blood calcium and helps regulate calcium balance?

09
Fill in the blank
1 point

Thyroid hormones affect metabolic activity, growth, and .

10
Choose one
1 point

Which pair of hormones supports rapid fight-or-flight responses?

  1. A

    Cortisol and aldosterone

  2. B

    Insulin and glucagon

  3. C

    Epinephrine and norepinephrine

  4. D

    Thyroxine and calcitonin

11
Choose all
1 point

Select all statements that correctly describe the hormone pathway connecting the hypothalamus, pituitary, and gonads.

  1. A

    The hypothalamus releases GnRH.

  2. B

    The gonads release GnRH to prompt the hypothalamus.

  3. C

    GnRH prompts the pituitary to release FSH and LH.

  4. D

    FSH and LH act on the ovaries or testes.

12
Choose one
1 point

How can an endocrine hormone released by a gland reach a target cell in a different part of the body?

  1. A

    They travel through ducts directly to each target cell.

  2. B

    They travel through the circulatory system to reach targets.

  3. C

    They move only through the digestive tract.

  4. D

    They affect only cells next to the gland that releases them.

13
True or false
1 point

Because a hormone circulates through the blood, every cell it reaches responds to it.

  1. A

    True

  2. B

    False

14
Open ended
1 point

Explain how negative feedback regulates thyroid hormone release. Include the signaling sequence from the hypothalamus to the thyroid and describe what happens as thyroid hormone levels rise.

15
Choose one
1 point

After a meal, a person's blood glucose rises. Which pancreatic hormone is stimulated to help bring blood glucose down?

  1. A

    Glucagon

  2. B

    Insulin

  3. C

    Melatonin

  4. D

    Parathyroid hormone

16
Choose one
1 point

Which role best describes the hypothalamus in the endocrine system?

  1. A

    It releases insulin to regulate blood glucose.

  2. B

    It produces testosterone to support sperm production.

  3. C

    It links nervous-system information to endocrine responses.

  4. D

    It releases T4 to directly regulate metabolic activity.

17
Choose one
1 point

A hormone travels through the blood and reaches several tissues, but only some cells change their activity. Which explanation best fits this observation?

  1. A

    Every cell reached by the hormone responds equally.

  2. B

    Only cells located beside an endocrine gland can respond.

  3. C

    The hormone must first be converted into a digestive enzyme.

  4. D

    Only cells with compatible receptors respond to the hormone.

18
Written response
1 point

Which adrenal hormone helps regulate blood pressure and salt balance? Enter the hormone name.

19
Choose one
1 point

When blood calcium is low, which hormone helps raise it and regulate calcium balance with the kidneys, intestines, and bones?

  1. A

    Parathyroid hormone

  2. B

    Calcitonin

  3. C

    Insulin

  4. D

    Thyroid-stimulating hormone

20
Written response
1 point

Which glands secrete parathyroid hormone (PTH), which helps raise blood calcium? Enter the name of the glands.