Gas Exchange Surfaces

Question 1

Formula for volume and surface area of a sphere

Answer 1

Volume = 4/3x pie x radius cubed

Surface area= 4 x pie x radius squared

Question 2

4 features of a gas exchange system

Answer 2

• Surface area needs to be as large as possible
• length of diffusion pathway has to be as small as possible
• diffusion gradient, has to be a high difference in concentration
• moist a gas exchange system need water to prevent it from drying up

Question 3

Ciliated epithilium and goblet cell

Where are they found
Trachea, brochi, bronchioles, alveoli?
What is their function?

Answer 3

Ciliated epithilium is found in the trachea, bronchi and bronchioles it functions to waft mucus out of the lungs
Goblet cells are found with ciliated epithilium they function to secrete mucus to trap pathogens

Question 4

Cartilage is a tissue of the gaseous exchange system

Where is it found and what is its function

Answer 4

Cartilage is found in the trachea and the bronchi

It prevents airways from collapsing due to low pressure when inspiring

Question 5

Smooth muscle - gaseous exchange tissue

Where is it found and what is its function

Answer 5

Found in the brochi and bronchioles it’s contracts to decrease the diameter of the lumen