Substances that are able to pass directly through the phospholipid bilayer are lipids, lipid-soluble molecules, and ______, such as O2 and CO2.
Fill in the blank(s) with the appropriate word(s).
soluble gases
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Mechanical stress applied to bone increases _____ activity in bone tissue.
a. chondrocyte b. osteoclast c. osteoblast
Which blood vessels experience the sharpest decrease in blood pressure?
A) systemic veins B) systemic arterioles C) systemic venules D) systemic capillary beds
Anemia is defined as
a) a condition where blood does not clot properly. b) a condition where blood cells are lysed by the immune response. c) a condition where there is excessive bleeding. d) a condition in which the oxygen-carrying capacity of blood is reduced. e) none of these choices.
In order for a hormone to activate a target cell, the target cell must possess __.
A. a receptor B. a second messenger C. the hormone D. a chaperone