Name ______________________________ Class ___________________ Date __________________
Section 6: The Endocrine System and Hormones
Study Guide 29- 6
Circle the letter of the word or phrase that best completes the sentence.
1. Hormones are produced in ___________.
a. steroids
b. membrane receptors
c. glands
d. nonsteroids
2. The presence of _______ determines whether or not a hormone will
affect a cell.
a. steroids
b. membrane receptors
c. glands
d. nonsteroids
3. Hormones that enter target cells by diffusing through the cell membrane
before binding to DNA are called _______________.
a. steroids
b. membrane receptors
c. glands
d. nonsteroids
4. Hormones that bind to receptors on the membranes of target cells and cause
chemical reactions to take place inside the cell are called _______________
a. steroids
b. membrane receptors
c. glands
d. nonsteroids
© Houghton Mifflin Harcourt Publishing Company.
Holt McDougal Biology
1
Nervous and Endocrine Systems
Name ______________________________ Class ___________________ Date __________________
12. The hypothalamus secretes a releasing hormone called
_____________________.
13. The pituitary releases _____________________.
14. The thyroid releases _____________________, which increases cell activity.
15. _____________________ stimulate the hypothalamus to stop producing TRH.
MAIN IDEA: Hormonal imbalances can cause serious illness.
Fill in the blank with the word or phrase that best completes the sentence.
16. Hormones are important to the body’s ability to maintain
_____________________, which is why hormone imbalances cause illness in
many different body systems.
Vocabulary Check
Fill in the blank with the word or term that best completes the sentence.
17. Chemical signals produced by the endocrine system are
_____________________.
18. The part of the endocrine system that produces hormones controlling cell
growth and the concentration of water in the blood is the
_____________________.
19. The part of the endocrine system that produces hormones that stimulate the
pituitary gland to produce hormones is the _____________________.
© Houghton Mifflin Harcourt Publishing Company.
Holt McDougal Biology
3
Nervous and Endocrine Systems