Types Of Transport

Question 1

What is bulk transport?

Answer 1

Large molecules such as enzymes, hormones and whole cells like bacteria are too large to move through channel or carrier proteins so are moved into and out of the cell by bulk transport

Question 2

What is active transport?

Answer 2

Uses energy to move molecules and ions across plasma membranes, against a concentration gradient

Question 3

What is endocytosis?

Answer 3

Cells take in substances

Question 4

What are the different types of endocytosis?

Answer 4

Phagocytosis- solids

Pinocytosis- liquids

Question 5

What does endocytosis need?

Answer 5

Uses ATP for energy

Question 6

What is the endocytosis process?

Answer 6

Membrane invaginates when it comes into contact with the material to be transported
Membrane enfolds the material until eventually the membrane fuses forming a vesicles
The vesicle pinched off and moves into the cytoplasm to transfer the material for further processing within the cell

Question 7

What is exocytosis?

Answer 7

Cells secrete substances

Question 8

What is the process for exocytosis?

Answer 8

Vesicles containing substances such as digestive enzymes, hormones, lips etc pj ch off from the sacs of the Golgi apparatus and Kobe towards the plasma membrane
Vesicles fuse with the plasma membrane and release their contents outside the cell
Some substances inserted straight into the plasma membrane