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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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.
Mechanical stress applied to bone increases _____ activity in bone tissue.
a. chondrocyte b. osteoclast c. osteoblast
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
Which blood vessels experience the sharpest decrease in blood pressure?
A) systemic veins B) systemic arterioles C) systemic venules D) systemic capillary beds