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What is Exocytosis in Biology? PDF | Download eBooks

Learn Exocytosis definition in biology with explanation to study “What is Exocytosis”. Study exocytosis explanation with biology terms to review biology course for online degree programs.

Exocytosis Definition

  • Exocytosis is the secretion of certain molecules by the fusion of vesicles with the plasma membrane.

    Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson



Exocytosis Explanation

Exocytosis is a form of active transport and bulk transport in which a cell transports molecules (e.g., neurotransmitters and proteins) out of the cell by secreting them through an energy-dependent process. Exocytosis and its counterpart, endocytosis, are used by all cells because most chemical substances important to them are large polar molecules that cannot pass through the hydrophobic portion of the cell membrane by passive means. Exocytosis is in process a large amount of molecules are released thus making it a form of bulk transport.

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