Substances moving through membrane B4

Question 1

How does glucose move through a cell membrane?

Answer 1

-Facilitated diffusion using a carrier protein because it is small and polar

Question 2

How does oxygen move through a cell membrane?

Answer 2

Simple diffusion because it’s small and non polar

Question 3

How does amino acids move through a cell membrane?

Answer 3

Facilitated diffusion using a carrier protein

Question 4

How do lipid soluble molecules move through a cell membrane?

Answer 4

E.g. Vitamin A
Facilitated diffusion and carrier proteins

Question 5

How does carbon dioxide move through a cell membrane?

Answer 5

Simple diffusion because it’s small and non polar

Question 6

How do K+ ions move through a cell membrane?

Answer 6

Facilitated diffusion using carrier proteins because it’s an ion (charged)

Question 7

How does water move through a cell membrane?

Answer 7

Osmosis using aquaporins

Question 8

What is the cell membrane?

Answer 8

partially permeable