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

Biology & Microbiology

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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

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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.

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The region of an enzyme to which a substrate binds is called the ________ site

A) active B) substrate C) enzymatic D) inactive

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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.

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