Specialised Exchanged Surfaces

Question 1

What is an specialised exchange surface

Answer 1

It a part of the an organism where they exchange substances with the environment

Question 2

What are the 2 main specialised exchange surfaces in a human?

Answer 2

Alveoli
Villi

Question 3

Alveoli (lungs)

Answer 3

Exchanges carbon dioxide and oxygen it’s found in the lungs

There are lots of alveoli which gives it a larger surface area

Substances only have to diffuse a short distance

There is a good supply of air

Question 4

Villi

Answer 4

There are ‘finger-like-things which absorb glucose+amino acids

Question 5

What do large multicellular organisms need

Answer 5

They need special exchange surfaces

Question 6

What are the 2 exchange surfaces in a plant

Answer 6

Root hair cell

Leaves

Question 7

Root hair cells

Answer 7

Help to absorb water+minerals from the soils.

Question 8

Leaves

Answer 8

They help to absorb C02 from the air due to their flattened shape

Question 9

What do all specialised exchanged surfaces have in common

Answer 9

1)A large surface which means they are able to diffuse easier.

2)The surfaces are very thin which means there are short substance to diffuse across. This allows diffusion to happen take place more quicker because there is a short distance

3) The exchange surfaces are permeable( which allows them to get across) with diffusions

Question 10

Animals

Answer 10

They have a good blood supply which allows them to have a good concentration

1) Glucose is absorbed into blood

2) Blood will be taken away

3) Replaced with blood that does not have a glucose

Question 11

External medium

Answer 11

The stuff outside of our bloodstream. Which allows a good supply of air which maintains the concentration gradient