What is endocytosis and exocytosis

Question 1

What are two processes which enable large quantities of materials (Solids or liquids) to be passed in and out of the cell

Answer 1

1. Endocytosis - out
2. Excoytosis - in

Question 2

Are endocytosis and excytosis active or passive processes

Answer 2

• Both require need ATP for active transport

Question 3

What are the two types of endocytosis

Answer 3

1. Phagocytosis
2. Pinocytosis

Question 4

What is the process of phagocytosis

Answer 4

1. Solid materials is taken into the cell in a vesicle
2. Lysosomes fuse with the vesicle, epting their enzymes into it
3. The enzymes digest the material and the products are absorbed into the cytoplasm
4. White blood cells called phagocytes remove cell debris and bacteria by phagocytosis

Question 5

What is the process of pinocytosis

Answer 5

• Is similar to phagocytosis
• Sometimes called cell drinking
• HOwever in this case fluid is taken into the cell
• The vesicles formed in pinocytosis are typically very small

Question 6

What is an example of pinocytosis

Answer 6

A human egg can take up nutrients from surrounding cells in pinocytes

Question 7

What is exocytosis

Answer 7

Exocytosis is the reverse of endocytosism molecules exit the cells

Question 8

What is an example of exocytosis

Answer 8

1. Useful secretions are released out of the cell e.g. digestive enzymes, hormones, or mucos