Respiratory System

Question 1

Cartilage

Answer 1

Hold the airways open

Question 2

Ciliated epithelium and goblet cells

Answer 2

Removal of dust and bacteria from airways

Question 3

Diaphragm and intercostal muscles

Answer 3

Ventilation of lungs-bring oxygen/removal of co2 and maintains the concentration gradient

Question 4

Many alvioli

Answer 4

Large surface area for diffusion

Question 5

Alveoli- large surface area to volume ratio

Answer 5

Increase rate of diffusion

Question 6

Elastic fibres

Answer 6

Recoil- returning alveoli to original size and helps to expel air

Question 7

Surfactant(alveoli)

Answer 7

Reduces surface tension-stops alveoli collapsing

Question 8

Alveolar squamous epithelium one cell thick

Answer 8

Short diffusion distance

Question 9

Capillary endothelium one cell thick

Answer 9

Short diffusion distance

Question 10

Erythrocytes

Answer 10

Transport oxygen- removes from plasma and maintains the conc gradient

Question 11

Extensive capillary network on surface

Answer 11

Short diffusion distance

Question 12

Continuous blood supply

Answer 12

Maintains concentration gradient

Question 13

Smooth muscle( airways/blood vessels)

Answer 13

Control the diameter of airways and blood vessels