Surface Area to Volume Ratio

Question 1

The larger the organisms size is
What is the surface area to volume ratio

Answer 1

Smaller

Question 2

What does it mean If a small organism has a large surface area to volume ratio

Answer 2

-smaller distance from outside the organism so easier to simply exchange substances across their surface

Question 3

What does it mean for large organisms that have a smaller surface area to volume ratio

Answer 3

-it has a larger distance from the outside
-larger organisms have a higher metabolic rate which demands for efficient transport out of the cell and reactants into the cell
-they have adaptations that help make exchange across surfaces more efficient

Question 4

What is the surface area of a cube that is 3 by 3 by 3 cm

Answer 4

SA= 3x3=9cm x 6= 54cm2
V= 3x3x3=27cm3
SA:V=54:27= 2:1

Question 5

What is the adaptation of microvilli and villi used for to increase surface area to volume ratio

Answer 5

It is In the small intestine to maximise the absorption of digested food

Question 6

What are 7 adaptations for gas exchange to increase surface area to volume ratio

Answer 6

-bronchioles and alveoli
-spiracles and trancheoles
-gill filaments and lamellae
-thin wide leaves

Question 7

What do many capillaries do In a capillary network

Answer 7

-it is adapted to increase the surface area to volume ratio