The optic nerve is formed from fibers of ________.
A. rods and cones
B. amacrine cells
C. ganglion cells
D. bipolar cells
Answer: C
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Some rat poisons contain a toxin that blocks the liver's ability to utilize vitamin K. Animals that consume this poison would die of
A) anemia. B) acidosis. C) hemorrhage. D) thrombocytopenia. E) starvation.
In general, the nervous system
A) controls only conscious activities. B) is fast acting. C) is long lasting. D) responds to changes in the external environment only. E) is one of the simplest organ systems.
When urination occurs, contraction of the muscular urinary bladder forces urine into the ________ and out of the body.
What will be an ideal response?
Which is true about mediated transport of substances across cell membranes?
A. It involves a specific membrane protein that functions as a carrier molecule. B. It always involves the movement of substances against a concentration gradient. C. It is always directly coupled to the splitting of ATP molecules. D. There is no limit to how fast it can occur as the concentration gradient becomes larger. E. It is the main mechanism for transporting hydrophobic molecules across membranes.