Biology 1.3.3

Question 1

What are the 3 Types of Exchange Methods? (3)

Answer 1

-Diffusion.
-Osmosis.
-Active Transport.

Question 2

What is the Role of the Small Intestine in the Human body?

Answer 2

Absorbs Digested Food Molecules into the Bloodstream.

Question 3

How is the Small Intestine Adapted to its Function in Humans? (3)

Answer 3

-Folded Surface- Increases SA.

-Single-Cell thick- Decreases Diffusion Distance.

-Good Blood Supply- Maintains a Concentration Gradient.

Question 4

What is the role of the Lungs in the Human Body?

Answer 4

Provides Blood with Oxygen you Breath in via Diffusion. Gas Exchange.

Question 5

How are the Human Lungs Adapted to their role? (2)

Answer 5

-Millions of Alveoli- Increases SA.

-Alveoli are 1 Cell thick- good Blood Supply, & Maintains a Concentration Gradient.

Question 6

What is the role of Root Hair Cells in Plants?

Answer 6

To Absorb Water & Mineral Ions from the Soil.

Question 7

How are Root Hair Cells Adapted to their role? (2)

Answer 7

-Branching network of Roots- Increases SA.

-The Surface of the Roots are covered in Root Hair Cells- Increases SA.

Question 8

What is the role of Leaves in Plants? (2)

Answer 8

-Photosynthesis.

-Gas Exchange in/out of Plant.

Question 9

How are Leaves Adapted to their Role? (2)

Answer 9

-Stomata & Guard Cells to Control the Circulation with Leaf & Air- Decreases Diffusion Distance for Gasses.

-Lower Layer of Leaf is made of Spongy Mesophyll Cells- allows Air to Circulate inside the Leaf.