The capitulum and trochlea are located
A. in the hand.
B. at the distal end of the ulna.
C. at the proximal end of the humerus.
D. at the distal end of the humerus.
Answer: D
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Following an injury to his arm, a patient complains that he has no sensations from the thumb, index finger, middle finger, and part of the ring finger. You suspect that he has damaged the
A. median nerve. B. radial nerve. C. musculocutaneous nerve. D. ulnar nerve. E. axillary nerve.
If cells are placed in a hypertonic solution containing a solute to which the membrane is impermeable, what could happen?
A) The cells will swell and ultimately burst. B) The cells will lose water and shrink. C) The cells will shrink at first, but will later reach equilibrium with the surrounding solution and return to their original condition. D) The cells will show no change due to diffusion of both solute and solvent.
In a workout your muscle cells produce lactate, yet you maintain a constant blood pH because ________.
A. metabolic bases are produced at the same rate by muscle cells to neutralize the acids B. the respiratory system removes excess H+ from the blood before the pH is lowered C. endothelial cells secrete excess H+ to prevent a decrease in pH D. metabolic acids are neutralized in muscle cells before released into the blood E. the body contains chemicals called buffers that resist changes in pH
ATP is used to power many cellular processes. Some genetic disorders are the result of defects in ATP creation. Which organelle is likely affected in these disorders?
A. Mitochondrion B. Ribosome C. Golgi apparatus D. Peroxisome