During an action potential, sodium ions move into the cell through ____
a. leaky channels
b. glial cell extensions
c. transport pumps
d. gated channels
e. osmosis
ANSWER: d
Biology & Microbiology
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The two magnifying lenses found in a light microscope are the
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Pairing of homologues and crossing over occur during ____
a. anaphase I b. metaphase II c. prophase I d. prophase II e. telophase II
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A ribozyme is a molecule of RNA that has catalytic properties.
a. true b. false
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What hormone lowers blood glucose levels?
A. Glucagon B. Insulin C. Melatonin D. Glucocorticoids E. Epinephrine
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