The most important factor affecting the pH of body fluids is the concentration of
A) lactic acid.
B) ketone bodies.
C) organic acids.
D) carbon dioxide.
E) hydrochloric acid.
D) carbon dioxide.
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Where is the primary center of ossification in endochondral ossification of a long bone?
A. The medullary cavity B. The diaphysis C. The epiphysis D. The mesenchyme E. The metaphysis
The tendency for physiological systems to stabilize internal conditions with respect to the external environment is called
A) integration. B) internal regulation. C) responsiveness. D) homeostasis. E) external regulation.
Single subunits that serve as the building blocks for organic compounds are termed:
A) reactants. B) polymers. C) monomers. D) enzymes.
All of the following are visceral effectors except
A) smooth muscles. B) cardiac muscle. C) adipocytes. D) skeletal muscles. E) glands.