Selective permeability of membranes

Question 1

What does it mean if a membrane is said to be permeable?

Answer 1

A membrane is said to be permeable to a substance if the substance can pass through

Question 2

What does it mean if a membrane is said to be impermeable?

Answer 2

A membrane is said to be impermeable to a substance if the substance cannot pass through it

Question 3

What is a membrane said to be if a substance can pass through it?

Answer 3

Permeable

Question 4

What is a membrane said to be if a substance cannot pass through it?

Answer 4

Impermeable

Question 5

What are selectively permeable membranes?

Answer 5

Membranes which allow some but not all molecules to pass through

Question 6

What type of membranes are selectively permeable?

Answer 6

Biological membranes

Question 7

List some materials which are selectively permeable

2

Answer 7

Visking tubing

Dialysis tubing

Question 8

List some molecules which can pass through selectively permeable biological membranes
(3)

Answer 8

Water
Oxygen
Carbon dioxide

Question 9

List some molecules which cannot pass through selectively permeable biological membranes
(3)

Answer 9

Sugars
Proteins
Salts