The process that occurs when a cell, tissue, organ, or organ system adjusts in response to some environmental change is
A) negative feedback.
B) positive feedback.
C) homeostatic equilibrium.
D) dynamic equilibrium.
E) autoregulation.
E
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Specialized animal cells that have contractile properties are called __________, or muscle cells
Fill in the blank with the correct word.
The effects of aging on the skin include all of the following except:
A. loss of fat from the subcutaneous tissue B. thinner epidermis C. increases in sebaceous gland activity D. reduction in collagen and elastin
The respiratory centers include three pairs of loosely organized nuclei in the ________ of the pons and the medulla.
Fill in the blank(s) with the appropriate word(s).
Which one of the following is NOT a main role of the liver?
A) detoxify drugs and alcohol B) degrade hormones C) make cholesterol D) process nutrients during digestion E) add ammonia to the blood