Module 10 ML-4

Question 1

What are the 5 steps of respiration

Answer 1

ventilation, exchange, transport, exchange, cellular respiration

Question 2

What is between the lung and the chest wall

Answer 2

intrapleural space

Question 3

Inspiration

Answer 3

Chest wall pulls out and lungs pull out
-pressure in lungs drops
-Palv<Patm

Question 4

Expiration

Answer 4

chest wall goes inward and volume in lung decreases
- Palv> Patm

Question 5

What pressure stays constant and what pressure changes

Answer 5

atm pressure stays constant and alv pressure changes due to the dimensions of the chest wall and lungs

Question 6

Boyle’s Law

Answer 6

at a constant pressure, the pressure of a fixed number of gas molecules is inversly proportional to the volume of the container

Question 7

More collisions=

Answer 7

more pressure due to a decreased volume size

Question 8

What is the main inhalation muscle?

Answer 8

diaphragm

Question 9

What muscles are recruited for deeper inhalation

Answer 9

sternocleidomastoid and scalenes

Question 10

What muscles are recruited for deeper exhalation

Answer 10

internal intercostals and abdominal muscles

Question 11

If not attached to anything what would the chest wall want to do

Answer 11

expand upward and outward by elastic recoil

Question 12

How is the chest wall held inward and downward?

Answer 12

by attachement to partieal wall of pleural sac, transmural pressure gradients and surface tension

Question 13

If lungs not attached to anything what would they want to do

Answer 13

lungs would want to collapse inward due to their elastic recoil

Question 14

How are the lungs pulled open

Answer 14

attachment to visceral wal of plueural sac

Question 15

In between breaths what are the pressure of the atmosphere and the lungs

Answer 15

they are equal

Question 16

Intrapleural pressure is below what

Answer 16

atmospheric and alveoli pressure

Question 17

What is the intrapleural pressure

Answer 17

-4 because it is getting pulled in opposite directions and increased the space which decreases the pressure

Question 18

Transpulomnary pressure

Answer 18

Palv-pip

Question 19

Chest wall

Answer 19

Pip-Patm

Question 20

FRC functional residual capacity

Answer 20

the volume of air remaining in the lungs at the end of a quiet exhale when respiratory muscles are relaxed

Question 21

At FRC what is equal

Answer 21

outward recoil of chest wall and inward recoil of the lung and
alevolar pressure = atmospheric pressure but there is no movement of ait

Question 22

If transpulomnary pressure is positive what does that mean

Answer 22

lungs are being held open and are not collasping

Question 23

What are the normal values at FRC

Answer 23

Pip=-4
Ptp=4
Patm and alv=0