Question

do you explain me the secretion process of amoeba with step by step ?​

Answer 1

Ans=Amoeba shows the holozoic nutrition. It means that the

Amoeba consumes the whole

food through the endocytosis and digests the food inside the cell within the food vacuole. The digestion process can be

describes as :

1. Ingestion- Amoeba moves towards the food by making pseudopodia. The pseudopodia surround the food particle and fuse to form the food vacuole, which is then taken inside the cytoplasm.

2. Digestion- The food vacuole is combined with lysosomes that contain the hydrolytic enzymes. These enzymes perform the breakdown of food particles.

3. Absorption- The digested food is then absorbed directly into the cytoplasm from where it will be distributed to the different organelles.

4. Assimilation- The absorbed food is used for the generation of energy. The excess amount is stored in the form of glycogen and lipids in the cytoplasm.

5. Excretion- The undigested food in the food vacuole is excreted out of the cell as the food vacuole fuses with the cell membrane and perform exocytosis.

Answer 2

Answer:

DIGESTION

Digestion in amoeba is intracellular taking place within the cell. 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.

The contents of the vacuole become lighter and the outline of the vacuole becomes indefinite indicating that the digestion is complete.

ABSORPTION

Since the food on digestion is converted into liquid diffusible form, it is readily absorbed by the cytoplasm. The vacuole becomes progressively smaller as the food is absorbed by diffusion.

ASSIMILATION

All the parts of the cell get the nutrients by the cyclic movement of the cytoplasm called the cyclosis. These nutrients are used to build new protoplasm. In this manner the food is assimilated.

EGESTION

The egestion takes place by exocytosis. There is no particular point from which the egestion takes place. As the amoeba moves forward, the undigested matter is shifted to the back and eliminated as food pellets through a temporary opening formed at any nearest point on the plasmalemma.