Homeostasis
Study Questions

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  1. Which of the following are characteristics of a steroid hormone? (check all that apply)
  1. They use a second messenger.
  2. They are lipid soluble and able to pass through the cell membrane.
  3. They bind to protein receptors.
  4. They turn transcription and translation on and off.
  5. They alter cellular functions.
  1. Which of the following are thermoregulation mechanisms in humans? (check all that apply)
  1. shivering or sweating
  2. alter behavior
  3. produce hormones to regulate metabolism
  4. regulate blood flow to the skin
  1. Many chemicals we place in the environment mimic hormones and can cause problems with our homeostatic system.
TRUE
FALSE
  1. Steroid hormones act through a second messenger.
TRUE
FALSE
  1. The skin aids in thermoregulation.
TRUE
FALSE
  1. Homeostasis is achieved by regulating the external environment.
TRUE
FALSE
  1. Evolution occurs because the body must adapt to a changing environment in order to facilitate homeostasis.
TRUE
FALSE
MATCHING:
(use lower case; incorrect responses will be replaced with a "?".)

8. adaptation a. size of ears

9. homeostasis b. second messenger

10. evolution c. characteristic that facilitates homeostasis

11. morphological mechanism d. hormones

12. physiologic mechanism e. change to maintain homeostasis

13. behavioral mechanism f. transcription and translation

14. steroid hormone g. balance

15. protein hormone h. seeking shelter
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