Which letter in the figure above corresponds to a large efflux of K+ ions from the cell?
A) A
B) B
C) C
D) D
E) E
Answer: C
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Which of the following is mismatched?
a. acetylcholine; muscle contraction b. endorphin; pain perception c. norepinephrine; fight-or-flight response d. serotonin; sexual function e. GABA; major inhibitor in the brain
Filtration of the blood in the kidney takes place in the
a. loop of Henle. b. glomerulus of Bowman's capsule. c. distal tubule. d. proximal tubule. e. collecting duct.
The region of an enzyme to which a substrate binds is called the ________ site
A) active B) substrate C) enzymatic D) inactive
Transferring Euglena into a dark environment results in the loss of photosynthetic pigment. What conclusion does this support?
A. Euglenoids are neither plant-like or animal-like protists. B. Euglenoids are closely related to plants. C. Euglenoids are obligate photoautotrophs. D. Light triggers heterotrophy.