Resp 2 Flashcards Preview

PHSI 208 > Resp 2 > Flashcards

Flashcards in Resp 2 Deck (31)
Loading flashcards...
1
Q

Type I alveolar cell

A

for gas exchange

2
Q

Type II alveolar cell

A

surfactant cell

3
Q

The pulmonary circulation has a ______ flow rate, and a _____ pressure circuit.

A

high, low

4
Q

partial pressure

A

pressure exerted by one gas

5
Q

Dalton’s law

A

the total pressure exerted by a mixture of gases is the sum of the pressure exerted by each gas

6
Q

Air moves from a region of ___ pressure to ___ pressure.

A

high, low

7
Q

F=

A

deltaP/R (pressure difference between two points, and resistance)

8
Q

pressures during inspiration

A

Palv < Patm

9
Q

pressures during expiration

A

Palv > Patm

10
Q

Boyle’s Law

A

P1V1=P2V2

11
Q

ventilation =

A

breathing

12
Q

define ventilation

A

bulk flow exchange of air between atmosphere and alveoli

13
Q

How does a spirometer work?

A

When subject inhales, air moves into lungs and volume of bell decreases causing the pen to rise on tracing

14
Q

tidal volume

A

~500ml; the normal volume of air displaced between normal inhalation and exhalation

15
Q

inspiratory reserve volume

A

~3000mL; the additional air that could still be inspired

16
Q

expiratory reserve volume

A

~1100mL; the volume of air that still remains within the lungs that can be expired

17
Q

residual volume

A

~1200mL; always in the lungs even with maximal expiratory effort

18
Q

Important functions of lung volumes

A
  • prevent airway collapse

- allows continuous exchange

19
Q

total lung capacity

A

sum of all 4 volumes

20
Q

functional residual capacity

A

sum of ERV and RV; capacity of air remaining after expiration

21
Q

inspiratory capacity

A

sum of IRV and TV; maximal amount of air than one can inspire

22
Q

vital capacity

A

sum of IRV, TV, and ERV; max achievable tidal volume

23
Q

FVC

A

forced vital capacity

24
Q

FEV1

A

forced expired volume in 1 second

25
Q

pulmonary function test

A

Testing an individuals FVC and comparing it to their FEV1

26
Q

During ventilation, air flows due to…

A

pressure gradients

27
Q

60%-75% of inspiratory volume change is due to…

A

the diaphragm

28
Q

Inspiration occurs when….

A

alveolar pressure decreases

29
Q

How do we decrease alveolar pressure/inspire?

A

increasing alveolar volume with our inspiratory skeletal muscles

30
Q

25%-40% of inspiratory volume change is due to..

A

movements of the rib cage

31
Q

Expiration occurs when…

A

alveolar pressure increases