Topic 8 Exchange And Trasnport

Question 1

What is label A?

Answer 1

Hydrophilic head

Question 2

What is label B?

Answer 2

Extrinsic protein

Question 3

What is label C?

Answer 3

Fatty acid tail

Question 4

What is label C?

Answer 4

Carrier Protein

Question 5

Which of the following is NOT a major component of the cell surface membrane?

Answer 5

Triglyceride

Question 6

What is the approximate thickness of the plasma membrane?

Answer 6

7.5nm

Question 7

Which of these relates to the diffusion of water molecules?

Answer 7

Osmosis

Question 8

This process is the net movement of particles from an area of higher concentration to an area of lower concentration?

Answer 8

Diffusion

Question 9

This process is the net movement of particles against the concentration gradient?

Answer 9

Active transport

Question 10

What benefits arise from large surface area to volume ratios?

Answer 10

Efficient gas exchange, increased absorption

Question 11

What is the formula for calculating surface area of a cube?

Answer 11

Surface area = 6 x (side length)^2

Question 12

What is the surface area to volume ratio of a cube with side length 3cm?

Answer 12

2:1

Question 13

What factors influence the diffusion rate?

Answer 13

Concentration gradient, thickness of exchange surface, surface area

Question 14

True or False: Single-celled organisms have a low surface area to volume ratio.

Answer 14

False

Question 15

What adaptations do multicellular organisms have for efficient gas exchange?

Answer 15

Specialized exchange organs, branching, folding

Question 16

What is the role of the circulatory system in multicellular organisms?

Answer 16

Transport substances to and from individual cells

Question 17

What is the significance of a higher surface area to volume ratio?

Answer 17

Faster rate of diffusion

Question 18

Fill in the blank: The process of diffusion occurs across the _______.

Answer 18

cell-surface membrane

Question 19

What is the surface area to volume ratio for a shape with surface area 54 cm² and volume 27 cm³?

Answer 19

2:1

Question 20

What is the importance of maximizing surface area in biological systems?

Answer 20

Better absorption of materials

Question 21

List some examples of specialized exchange surfaces in organisms.

Answer 21

• Lungs
• Alveoli
• Villi
• Microvilli

Question 22

What is the approximate surface area of a cube with side length 3cm?

Answer 22

54 cm²

Question 23

What is the approximate volume of a cube with side length 3cm?

Answer 23

27 cm³