Exchanging Materials

Question 1

How do you find the surface area to volume ratio?

Answer 1

Find the surface area then the area of both objects then put them into a ratio and simply and then compare which one is bigger.

Question 2

Why is it bad to have a small surface area to volume ratio?

Answer 2

Not all molecules can get through to each cell and the metabolic waste cannot be removed fast enough to avoid poisoning.

Question 3

What are the most common adaptations of exchanging materials:

Answer 3

Having a large surface area-> increase in diffusion
Thin membrane->short diffusion
Efficient blood supply->moves the diffusing substances away
Ventilated makes the gas exchange more efficient.

Question 4

In the Villi what are the adaptations to increase active transport?

Answer 4

Finger-like folds-> increase the surface area
Rich blood supply for gas exhange.
Thin membrane->Short diffusion path

Question 5

What are the adaptations in the Alveoli to increase diffusion?

Answer 5

enormous surface area

Rich blood supply->gas exchange

Question 6

What are the adaptations for Gills?

Answer 6

The filaments the water provide a constant concentration gradient for gas exchange.

Question 7

What are the adaptations for Plants?

Answer 7

They are Flat, thin they have air spaces in the leaf tissue, the stomata provide a big surface area for diffusion of water, mineral ions and C02