3: EXCHANGE SYSTEMS AND MASS TRANSPORT - SA:V RATIO

Question 1

What kind of organisms usually have a larger SA:V ratio?

Answer 1

• unicellular organisms
• small organisms

Question 2

What kind of organisms usually have a smaller SA:V ratio?

Answer 2

large organisms

Question 3

Do organisms with large SA:V ratio have a short diffusion pathway/long diffusion pathway?

Answer 3

short diffusion pathway

Question 4

Do organisms with small SA:V ratio have a short diffusion pathway/long diffusion pathway?

Answer 4

long diffusion pathway

Question 5

What is metabolism?

Answer 5

all chemical reactions involved in maintaining a living state

Question 6

What is metabolic rate?

Answer 6

energy usage by an organism in a given time

Question 7

What is basal metabolic rate?

Answer 7

energy usage at rest to maintain basic functions

Question 8

Describe the metabolic rate of organisms with a larger SA:V ratio

Answer 8

higher metabolic rate per unit mass (than organisms with a small SA:V ratio)

Question 9

Describe the metabolic rate of organisms with a smaller SA:V ratio

Answer 9

higher overall metabolic rate (than organisms with a large SA:V ratio)