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Homeostasis is the condition in which the body maintains ________.
a. a dynamic state within an unlimited range
b. the lowest possible energy usage
c. a static state with no deviation from preset points
d. a relatively stable internal environment, within limits


A good example of a positive feedback mechanism would be ________.
a. enhancement of labor contractions
b. regulating glucose levels in the blood
c. blood calcium level regulation
d. body temperature regulation


Which of the following statements is true concerning feedback mechanisms?
a. Negative feedback mechanisms work to prevent sudden severe changes within the body.
b. Positive feedback mechanisms always result in excessive damage to the host.
c. Blood glucose levels are regulated by positive feedback mechanisms.
d. Negative feedback mechanisms tend to increase the original stimulus.


Which body systems are absolutely essential for homeostasis?
a. cardiovascular and endocrine systems
b. nervous and cardiovascular systems
c. cardiovascular and digestive systems
d. nervous and endocrine systems


Which represents the correct order in which the elements interact in a homeostatic control system?
a. The receptor, the stimuli and the control center.
b. The variable, the receptor, the control center and the effector.
c. The variable, the stimuli, the receptor, the control center and the effector.
d. The receptor, the control center and the effector.


Place the following in correct sequence from simplest to most complex:
1. molecules
2. atoms
3. tissues
4. cells
5. organ

a. 1-2-3-4-5
b. 2-1-3-4-5
c. 2-1-4-3-5
d. 1-2-4-3-5


What is the main, general purpose of negative feedback?
a. to maintain homeostasis
b. to control all body system tissues
c. to regulate excretion
d. to keep the body's sugar high


In a homeostatic control mechanism, which component monitors the environment?
a. receptor
b. control center
c. stressor
d. effector


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