what is phagocytosis? what is pinocytosis?

Answer 1

PHAGOCYTOSIS



Phagocytosis (literally "cell-eating") is a form of endocytosis wherein large particles are enveloped by the cell membrane of a (usually larger) cell and internalized to form a phagosome, or "food vacuole."

In animals, phagocytosis is performed by specialized cells called phagocytes, which serve to remove foreign bodies and thus fight infection. In vertebrates, these include larger macrophages and smaller granulocytes, types of blood cells. Bacteria, dead tissue cells, and small mineral particles are all examples of objects that may be phagocytosed. Virulent bacteria may need to be coated in antibodies before they can be consumed. Certain pathogenic bacteria, such as those of leprosy and tuberculosis, once internalized through phagocytosis, are resistant to killing by the phagocytes that have ingested them. Anything that impedes or prevents the action of phagocyctes is termed antiphagocytic


In many protists, phagocytosis is used as a means of feeding, providing part or all of their nourishment. This is called phagotrophic nutrition, as distinguished from osmotrophic nutrition, which takes place by absorption. In some, such as amoebae, phagocytosis takes place by surrounding the target object with pseudopods, as in animal phagocytes. In other protozoa, for instance, ciliates, there is a specialized groove or chamber in the cell where phagocytosis takes place, called the cytostome or mouth. The resulting phagosome may be merged with lysosomes containing digestive enzymes, forming a phagolysosome. The food particles will then be digested, and the released nutrients diffused or transported into the cytosol to use in other metabolic processes.


PINOCYTOSIS


In cellular biology, pinocytosis ("cell-drinking") is a form of endocytosis, a process in which small particles are taken in by a cell by splitting into smaller particles. The particles then form small vesicles which subsequently fuse with lysosomes to hydrolyze, or to break down, the particles. This process requires adenosine triphosphate (ATP), the chemical compound used as energy in a majority of cells. Pinocytosis is primarily used for the absorption of extracellular fluids (ECF), and in contrast to phagocytosis, generates very small vesicles. Unlike receptor-mediated endocytosis, pinocytosis is unspecific in the substances that it transports. The cell takes in surrounding fluids, including all solutes present.

Answer 2

Pinocytosis Definition

Answer 3

Pinocytosis is the process by which living cells absorb liquids. It is different yet similar to Phagocytosis where the cells absorb solid matter.

Pinocytosis is a process that is occurring constantly, as most cells need in a sense to hydrate. The membrane of the cell will wrap or attach itself to a drop and gradually pinch it into the cells interior. The vesicles are then absorbed by the cell into the cytosol.

All cells go through the process of pinocytosis. The process is one of everyday life and though it involves the entire cell to perform the task, it rarely requires the cell to go hunting for drops.

Pinocytosis is a process of endocytosis and is also known as cell drinking. The cells have to utilize adenosine triphosphates as an energy source to complete the process of Pinocytosis.

Answer 4

Phagocytosis is when a cell engulfs a solid mass. It's a form of eating. Pinocytosis is the same thing except with liquids...so it's like drinking.

Answer 5

Phagocytosis is the process by which an organism engulfs its food; a mechanism of eating.

Answer 6

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what is phagocytosis? what is pinocytosis?