Physiology

Question 1

If the intrapleural pressure is 0 at the end of a normal expiration then what has likely happened?

Answer 1

pneumothorax

Question 2

describe what surfactant does?

Answer 2

reduces surface tension in SMALL alveoli, preventing their collapse

Question 3

• Premature babies

- damage to type 2 pneumocytes in adults

Answer 3

Respiratory distress syndrome

Question 4

what things decrease the affinity of Hb for oxygen?

where does this normally occur?

Answer 4

• increase in body temp
• decrease in pH
• pCO2 goes up
• increase in 2,3 BPG

Question 5

receptors that trigger cough in response to various irritants?

Answer 5

rapidly adapting pulmonary stretch receptors

Question 6

receptors that tell the brain how much air is in lung so as firing rate increases in these, they increase expiration and decrease inspiration?

Answer 6

slowly adapting

Question 7

these receptors are in capillaries and detect edema and trigger rapid shallow breathing and coughing

Answer 7

J receptor