Transport of Substances

Question 1

As the size of the organism increases….

Answer 1

1. Surface area to volume ratio decreases
2. Diffusion distance increases
3. Metabolic rate increases

Question 2

What is a mass transport system?

Answer 2

The circulatory system in mammals which moves substances around the body, allowing the substances to exchange to take place

Question 3

Features of the mass transport system

Answer 3

1. A network to move through e.g. vessels
2. A medium for movement e.g. fluid & blood
3. Controlled direction
4. Maintenance of speed