Chapter 23: Respiratory (lecture 15)

Question 1

Visceral Pleura covers what?

Answer 1

Lungs

Question 2

Parietal Pleura lines and covers what?

Answer 2

lines ribcage and cover upper surface of diaphragm

Question 3

what enters at hilus?

Answer 3

blood vessels and airways

Question 4

type I alveolar cells?

Answer 4

simple squamous cells where gas exchange occurs

Question 5

type II alveolar cells?

Answer 5

• free surface has microvilli

- secrete alveolar fluid containing surfactant

Question 6

alveolar dust cells

Answer 6

wandering macrophages remove debris

Question 7

Exchange of gas from alveoli to blood there are

4 Layers of membrane to cross

Answer 7

• alveolar epithelial wall of type I cells
• alveolar epithelial basement membrane
• capillary basement membrane
• endothelial cells of capillary

Question 8

what happens when air moves INTO lungs?

Answer 8

pressure inside lungs is less than atmospheric pressure

Question 9

what happens when air moves OUT of lungs?

Answer 9

pressure inside lungs is greater than atmospheric pressure

Question 10

Atmospheric pressure

Answer 10

1 atm or 760mmhg

Question 11

Boyle’s Law

Answer 11

the pressure and volume of a gas have an inverse relationship, when temperature is held constant