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Free Practice Quiz Question List

3 The Endocrine System Online Quiz Questions

Use this free practice quiz with 20 questions to review 3 The Endocrine System, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: Hormone-secreting cells are found only in organs whose main function is endocrine.

  1. A

    True

  2. B

    False

02
Choose one
1 point

Which change in blood chemistry is promoted by parathyroid hormone (PTH)?

  1. A

    It lowers blood calcium.

  2. B

    It raises blood calcium.

  3. C

    It lowers blood glucose.

  4. D

    It raises blood glucose.

03
Fill in the blank
1 point

Oxytocin and ADH are made in the hypothalamus, then stored and released by the .

04
Written response
1 point

What category of stimulus occurs when a change in a blood-borne substance triggers hormone release?

05
Choose one
1 point

Which anterior pituitary hormone supports tissue building and can produce some growth effects indirectly through insulin-like growth factors?

  1. A

    Prolactin

  2. B

    Growth hormone (GH)

  3. C

    Melatonin

  4. D

    Calcitonin

06
Choose all
1 point

Select all statements that correctly compare peptide or protein hormones with steroid hormones.

  1. A

    Peptide and protein hormones are generally water-soluble and bind to cell-surface receptors.

  2. B

    Steroid hormones are lipid-soluble and usually bind to receptors inside cells.

  3. C

    Steroid hormones are generally water-soluble and usually bind to cell-surface receptors.

  4. D

    Peptide hormones generally pass through cell membranes and bind receptors in the nucleus.

07
True or false
1 point

True or false: Amine hormones all act through the same receptor location: inside the target cell.

  1. A

    True

  2. B

    False

08
Written response
1 point

Which second messenger can be produced after a membrane receptor activates a G protein?

09
Fill in the blank
1 point

During childbirth, uterine contractions promote further release of , amplifying the response.

10
Choose all
1 point

Select all statements that correctly describe ways hormones can interact.

  1. A

    Synergistic hormones work together.

  2. B

    A permissive effect occurs when one hormone enables a full response to another.

  3. C

    Antagonistic hormones produce opposing responses.

  4. D

    A synergistic effect occurs when one hormone blocks the effect of another.

11
Choose one
1 point

Which statement correctly describes the start of the hormone-signaling sequence that regulates reproductive function?

  1. A

    FSH stimulates the hypothalamus to release GnRH.

  2. B

    LH stimulates the anterior pituitary to release GnRH.

  3. C

    GnRH stimulates the anterior pituitary to release FSH and LH.

  4. D

    The gonads stimulate the hypothalamus to release FSH and LH.

12
Choose one
1 point

Which hormonal change helps trigger ovulation shortly before it occurs?

  1. A

    Falling estrogen suppresses LH and triggers ovulation.

  2. B

    Rising estrogen contributes to an LH surge that triggers ovulation.

  3. C

    Rising progesterone suppresses FSH and triggers ovulation.

  4. D

    Rising LH causes estrogen to fall, which triggers ovulation.

13
Choose one
1 point

In the thyroid feedback axis, what happens to hypothalamic TRH and pituitary TSH signaling as thyroid hormone levels rise?

  1. A

    TRH and TSH release both increase, stimulating the thyroid further.

  2. B

    TRH release decreases, but TSH release increases.

  3. C

    Further TRH and TSH release are inhibited.

  4. D

    Neither TRH nor TSH release changes.

14
Open ended
1 point

Explain how insulin and glucagon help stabilize blood glucose after a meal and between meals. Include the pancreatic cell types involved and the effect of each hormone on glucose.

15
True or false
1 point

True or false: A steroid hormone can cross a target cell’s membrane, bind to an intracellular receptor, and influence which proteins the cell makes.

  1. A

    True

  2. B

    False

16
Written response
1 point

In the pathway from hypothalamic TRH to thyroid hormone production, what abbreviation names the pituitary hormone that stimulates the thyroid?

17
Choose one
1 point

After a meal, blood glucose rises. Which response helps return it toward its usual range?

  1. A

    Alpha cells release glucagon, prompting the liver to release glucose.

  2. B

    Beta cells release insulin, promoting glucose uptake and storage.

  3. C

    The thyroid releases calcitonin, promoting glucose storage.

  4. D

    The adrenal medulla releases epinephrine, lowering blood glucose by storing it as glycogen.

18
Choose one
1 point

During stress, sympathetic nerves trigger the adrenal medulla to release epinephrine and norepinephrine. What type of stimulus triggers this hormone release?

  1. A

    A change in blood glucose

  2. B

    A hormone released by another endocrine gland

  3. C

    Sympathetic nerve activity

  4. D

    A rise in blood calcium

19
Choose one
1 point

If blood calcium needs to be raised, which hormone most directly supports that change?

  1. A

    Parathyroid hormone

  2. B

    Calcitonin

  3. C

    Aldosterone

  4. D

    Melatonin

20
Written response
1 point

During childbirth, contractions promote more release of a hormone that strengthens those contractions. Which hormone is involved?