Question

1. the negative feedback mechanism works by...

a) only producing hormones when the hormone levels are high enough
b) hormones are constantly produced
c) hormones are only made when the organism tells them to be produced
d) only producing hormones when they fall below their ideal levels in the blood

1. how are the actions of steroid hormones different than non - steroid hormones?

a) non - steroid hormones are unable to enter cells, therefore they must bind to an extracellular receptor protein
b) neither type of hormone has to bind to a receptor protein
c) steroid based hormones are unable to enter the cell directly
d) both types of hormones directly enter cells and nuclear membranes to have desired effect

1. which of the following is not a protein hormone?

a) thyroid stimulating hormone
b) estrogen
c) antidiuretic hormone
d) growth hormone
bonus: which endocrine gland is responsible for creating and releasing the hormone glucagon?
a. thyroid
b. pituitary
c. adrenal
d. pancreas

Explanation:

• For question 8, negative - feedback mechanisms work to maintain homeostasis by producing hormones when their levels fall below ideal levels.
• For question 9, non - steroid hormones are unable to enter cells and bind to extracellular receptor proteins, while steroid hormones can enter cells.
• For question 10, estrogen is a steroid hormone, not a protein hormone.
• For the bonus question, the pancreas releases glucagon.

Answer:

1. d) Only producing hormones when they fall below their ideal levels in the blood
2. a) Non - steroid hormones are unable to enter cells, therefore they must bind to an extracellular receptor protein
3. b) Estrogen

BONUS: d. pancreas