Lesson 2

Question 1

How is active transport used in the cell membrane?

Answer 1

• Requires energy from hydrolysis of ATP so prevented by respiratory inhibitors
• Only charged particles and polar molecules are transported this way
• Uses carrier proteins and moves molecules against conc grad

Question 2

Name processes involving active transport

Answer 2

Nerve impulse transmission, reabsorption of glucose in kidney, muscle contraction

Question 3

Summarise bulk transport

Answer 3

Transport of materials in bulk in or out of cell and requires ATP

Question 4

What is exocytosis?

Answer 4

Secretion of vesicles which contains hormones or digestive enzymes and fuse with cell membranes, releasing contents from cell

Question 5

What is endocytosis?

Answer 5

Uptake of particles where they are engulfed by cell and trapped in vesicle or vacuole

Question 6

Describe difference between phagocytosis and pinocytosis

Answer 6

Phagocytosis is the uptake of solids whereas pinocytosis is the uptake of fluids