L2. Respiration Mechanics

Question 1

What does peripheral circulation mean?

Answer 1

Gas exchange

Question 2

What does pulmonary circulation mean?

Answer 2

Blood exchange

Question 3

What is PO2 at rest?

Answer 3

Po2 at rest = 100mmHg

Question 4

What is PCO2 at rest?

Answer 4

PCO2 = 40mmHg

Question 5

Gas volume exchange : 02/min at rest?

Answer 5

250ml

Question 6

Gas volume exchange : 02/min walking?

Answer 6

800ml

Question 7

Gas volume exchange : 02/min severe exercise

Answer 7

5L

Question 8

Gas volume exchange : C02/min at rest

Answer 8

200ml

Question 9

Gas volume exchange : C02/min walking

Answer 9

750ml

Question 10

Gas volume exchange : C02/min severe exercise

Answer 10

6L

Question 11

What do the upper airways do to the air?

Answer 11

Warms and humidifies air by saturation with water.

Question 12

Describe the cell type in the upper airways

Answer 12

Pseudostratified ciliated columnar epithelium

Question 13

Is inspiration active or passive?

Answer 13

Active - diaphragm contracts, ribs move up and out.

Question 14

At rest, is expiration active or passive? Describe why?

Answer 14

Passive due to elastic recoil

Question 15

During extreme exercise is expiration active or passive?

Answer 15

Active

Question 16

What happens to pleural pressure (between lungs and ribs) during inspiration?

Answer 16

Pleural pressure becomes more negative