Most intrinsic hand muscles are supplied by the
A) musculocutaneous nerve.
B) radial nerve.
C) median nerve.
D) ulnar nerve.
E) axillary nerve.
Answer: D) ulnar nerve.
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The ________ are the small muscles located in the dermis that cause goose bumps.
Fill in the blank(s) with the appropriate word(s).
What statement does NOT describe the methods by which chemical buffer systems operate to maintain pH?
A) Buffer systems consist of a weak acid and its conjugate weak base which function to resist large swings in pH. B) When a strong acid is added to a solution, the weak base of the buffer system binds the released hydrogen ions and removes them from solution. C) When a strong base is added to a solution, the buffer system's weak acid releases its hydrogen ions to bind the base ions. D) All excess hydrogen ions are removed from the body in the urine.
The prefix hypo- means ________, whereas hyper- means ________.
A. front; back B. clear; dark C. below; above D. inside; outside E. right; left
Which activity will result in the recruitment of the highest number of motor units?
A) lifting a 10-lb barbell B) lifting a 2-lb barbell C) lifting a 25-lb barbell D) lifting a 5-lb barbell