Mass Transport Flashcards
1
Q
Why would a mammal need a mass transport survey
A
- bigger organism has a lower SA:v
- substance needed by a larger organism cant be supplied y body surface alone
- specialist exchange systems needed to absorb nutrients and respiratory gases
- 02 would quickly used up before reaching underlying layers
- waste products would be excreted as quickly
2
Q
What are the main features of a mass transport system
A
- suitable medium to carry materials
- closed system of tubular vessels that contains transport medium
- mechanism to move medium
- all substance move in the same speed and direction
3
Q
How is a mass transport system achieved in animals
A
Through muscles contraction either through body muscles or a specialised heart
4
Q
How is a mass transport system achieved through plants
A
- Mechanisms to maintain mass flow movement in 1 direction
- controlling flow of transport medium
- mechanisms for the mass flow of water and gas
