AP Biology· difficulty 2/5
The process depicted in the diagram is:
Endocytosis - membrane invagination engulfing extracellular material
Active transport - pumps moving ions
Diffusion - solutes crossing the bilayer directly
Exocytosis - vesicles fusing with the plasma membrane
Explanation
Inward folding of the plasma membrane that captures extracellular cargo into a new internal vesicle is endocytosis.
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