MICROANATOMY

EPITHELIUM CONNECTIVE TISSUE SKIN

EPITHELIA GLANDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Two types of endocytosis are ____
A
cellular secretion and solute pumping
B
solute pumping and active transport
C
active transport and phagocytosis
D
phagocytosis and pinocytosis
E
pinocytosis and passive transport
Explanation: 

Detailed explanation-1: -Endocytosis consists of phagocytosis, pinocytosis, and receptor-mediated endocytosis. Endocytosis takes particles into the cell that are too large to passively cross the cell membrane. Phagocytosis is the taking in of large food particles, while pinocytosis takes in liquid particles.

Detailed explanation-2: -The term “endocytosis” was coined by Christian deDuve in 1963 to include both the ingestion of large particles (such as bacteria) and the uptake of fluids or macromolecules in small vesicles. The former of these activities is known as phagocytosis (cell eating) and the latter as pinocytosis (cell drinking).

Detailed explanation-3: -Phagocytosis and Pinocytosis are similar as they both are engulfing a material. Phagocytosis is the bulk uptake of solid material where as pinocytosis is the bulk uptake of liquid material and both of them are endocytosis. Exocytosis means opposite of endocytosis i.e. releasing something out.

Detailed explanation-4: -Phagocytosis is the bulk absorption of solid material, while pinocytosis is the bulk uptake of liquid material. Exocytosis is the inverse of endocytosis, which means releasing everything. Note: Endocytosis is a cell component in which a cell conceals substances from its surroundings.

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