Explain the process of nutrition in amoeba.
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Answers
Amoeba takes its nutrition through a process called phagocytosis where the entire organism swallows the food it plans on eating up. The mode through which an amoeba engulfs nutrition is known as holozoic nutrition. It leads to the process of ingestion, digestion and egestion of food material.
Nutrition in an Amoeba occurs through a process called phagocytosis where the entire organism pretty much engulfs the food it plans on eating up. The mode of nutrition in amoeba is known as holozoic nutrition. It involves the ingestion, digestion and egestion of food material.
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The mode of nutrition in amoeba is holozoic.
Mechanism of Nutrition
Ingestion : The food is ingested at the point where it comes in touch with the cell surface with the help of pseudopodia. Pseudopodia engulf the food into the cytoplasm.
Invagination: Pseudopodia secretes a sticky and toxic fluid which adheres and kills the prey. It is then taken in by invagination.
Pinocytosis: Also called cell drinking. There are pinocytosis channels at certain points through which the cell ingests the food digestion in amoeba takes place. The food taken in remains in a food vacuole or gastric vacuole formed by the cell membrane and small part of the cytoplasm.
The vacuoles are transported deeper into the cells by cytoplasmic movements. Here they fuse with lysosomes that contain enzymes. Two enzymes amylase and proteinase have been reported.
Thus, amoeba can digest sugars, cellulose and proteins. Fats, however, remain undigested.
Thus, amoeba can digest sugars, cellulose and proteins. Fats, however, remain undigested.The contents of the vacuole become lighter and the outline of the vacuole becomes indefinite indicating that the digestion is complete.
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