transport

Question 1

unicellular organisms have what type of surface area in comparison to their volume?

Answer 1

very large surface areas in comparison to their volumes

Question 2

what does their surface area and volume mean for the organism?

Answer 2

the distance between the surface of the organism to its centre is very small

Question 3

why do unicellular organisms not need a transport system?

Answer 3

diffusion, osmosis and active transport occurs through the cell membrane at a sufficient rate to meet the organisms needs

Question 4

large multicellular organisms have what type of surface area in comparison to their volumes?

Answer 4

relatively small surface areas in comparison with their volumes

Question 5

what does the relationship between surface area and volume mean for the distance?

Answer 5

the distance between the surface area of the organism to the centre is relatively long

Question 6

why do multicellular organisms need transport systems?

Answer 6

diffusion, osmosis and active transport cannot occur at a sufficient rate to meet the organisms needs

Question 7

exchange surfaces in animals include?

Answer 7

• the lungs & alveoli for gas exchange
• the small intestines and villi for absorption of undigested food

Question 8

transport systems in animals include?

Answer 8

• blood and circulatory systems carry the necessary substances around the body

Question 9

exchange systems in plants include?

Answer 9

• roots and root hairs where minerals are absorbed
• the leaves for gas exchange

Question 10

transport systems in plants include?

Answer 10

• the xylem moves water and mineral ions from roots to shoots
• the phloem moves sugars and amino acids to where they are needed in the plant