Mechanisms of Transport

AP Biology· difficulty 3/5

Receptor-mediated endocytosis allows cells to

A
$Selectively bring in specific molecules that bind to membrane receptors$
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B
$Nonspecifically engulf any nearby extracellular fluid and dissolved solutes$
C
$Pump specific ions across the membrane against their concentration gradient$
D
$Selectively export specific waste molecules through receptor-coated vesicles$

Explanation

Receptors cluster in coated pits and are internalized when ligand binds, providing high specificity.

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