An increase in the rate and depth of breathing causes a(n) ________ in blood CO2 concentration and a(n) ________ in blood pH.
A. decrease; decrease
B. increase; increase
C. decrease; increase
D. increase; decrease
Answer: C
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Which of the following does not impede the regeneration of CNS axons?
A. Scar tissue may form, obstructing regrowth. B. Oligodendrocytes do not release a nerve growth factor. C. CNS axons lack the myelin sheath needed for regeneration. D. No exceptions; all of the choices impede axon regeneration.
When a strong acid is placed in water, it
A. does not dissolve or dissociate.?B. dissolves but does not dissociate.?C. dissolves and dissociates.?D. dissociates, but does not dissolve.
Matching
A) D B) A C) B D) C 25) Mainly produces glucocorticoids. 26) Produces epinephrine. 27) Produces aldosterone. 28) Excess hormone levels from this region result in Cushing's syndrome. 29) Hormones mimic sympathetic nervous system neurotransmitters. 30) Mainly produces small amounts of gonadocorticoids.
Why is the temporomandibular joint considered to be a second-class lever?
A. It has a mechanical advantage of 1.0 or less. B. The force is in the middle. C. The effort arm is longer than the resistance arm. D. The fulcrum is in the middle. E. The resistance is in the middle.