The brachial artery branches to form the radial and ________ arteries
A) axillary
B) digital
C) ulnar
D) subclavian
E) brachiocephalic
Answer: C
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Starting at the spinal cord, the subdivisions of the brachial plexus are (in order):
A) roots, trunks, divisions, and cords B) roots, divisions, cords, and trunks C) divisions, roots, trunks, and cords D) trunks, divisions, cords, and roots
Which of the following is not an example of a homeostatic mechanism in the human
body? A) Secreting insulin after a meal to return blood sugar concentration toward normal. B) Increasing heart rate and force of contraction when blood pressure falls. C) Retention of fluid leading to retention of more fluid. D) Shivering when body temperature falls below normal.
Which of the following contains overlapping thick and thin myofilaments?
A. A band B. M line C. Z discs D. H band E. I band
Which of the following will best increase the conduction rate of action potentials?
A) Decrease the diameter of the axon, increase the resistance of the axon membrane to ion leakage. B) Increase the diameter of the axon, increase the resistance of the axon membrane to ion leakage. C) Increase the diameter of the axon, decrease the resistance of the axon membrane to ion leakage. D) Decrease the diameter of the axon, decrease the resistance of the axon membrane to ion leakage.