4 differences between Exocytosis and Pinocytosis?
Answers
Explanation:
Contents Home Bookshelves Introductory and General Biology Book: Introductory Biology (CK-12) 2: Cell Biology Expand/collapse global location
2.17: Exocytosis and Endocytosis
Last updatedMay 7, 2020
2.16: Sodium-Potassium Pump
2.18: Autotrophs and Heterotrophs
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CK-12: Biology Concepts
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What does a cell "eat"?
Is it possible for objects larger than a small molecule to be engulfed by a cell? Of course it is. This image depicts a cancer cell being attacked by a cell of the immune system. Cells of the immune system consistently destroy pathogens by essentially "eating" them.
Vesicle Transport
Some molecules or particles are just too large to pass through the plasma membrane or to move through a transport protein. So cells use two other active transport processes to move these macromolecules (large molecules) into or out of the cell. Vesicles or other bodies in the cytoplasm move macromolecules or large particles across the plasma membrane. There are two types of vesicle transport, endocytosis and exocytosis (illustrated in Figure below). Both processes are active transport processes, requiring energy.
Process of vesicle transport for exocytosis and endocytosis
Illustration of the two types of vesicle transport, exocytosis and endocytosis.
Endocytosis and Exocytosis
Endocytosis is the process of capturing a substance or particle from outside the cell by engulfing it with the cell membrane. The membrane folds over the substance and it becomes completely enclosed by the membrane. At this point a membrane-bound sac, or vesicle, pinches off and moves the substance into the cytosol. There are two main kinds of endocytosis:
Phagocytosis, or cellular eating, occurs when the dissolved materials enter the cell. The plasma membrane engulfs the solid material, forming a phagocytic vesicle.
Pinocytosis, or cellular drinking, occurs when the plasma membrane folds inward to form a channel allowing dissolved substances to enter the cell, as shown in Figure below. When the channel is closed, the liquid is encircled within a pinocytic vesicle.
Answer:
Exocytosis- This process is called Cell
vomiting or Ephagy.
Secretory products are passed out of
the cell through Exocytosis.
e.g. secretion of Enzymes and
Hormones is carried out by Exocytosis.
Explanation:
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