Test 3

Question 1

What’s does the aveolar defense do

Answer 1

Alveolar macrophages ( big eaters)
       Traits: eat dust

Question 2

What’s the pathway of O2 from alveoli

Answer 2

Alveoli—-> blood—-> RBC

Question 3

What’s the pathway of CO2 from alveoli

Answer 3

RBC—-> blood—-> alveoli

Question 4

What is surfactant

Answer 4

Respiratory surfaces are thin and moist 
Surfactant prevents sticking
        - detergent breaks surface tension of water
        - allows alveoli to inflate 
        - produced by pneumocyte 2

Question 5

When is the diaphragm up?

Answer 5

When relaxed

Question 6

When is the diaphragm down?

Answer 6

When contracted

Question 7

What are pleura membrane

Answer 7

Membrane that encases pleural cavity

Question 8

Membrane that wraps the lungs are called?

Answer 8

Visceral plureal

Question 9

Membrane that wraps body wall is called?

Answer 9

Parietal pleural

Question 10

What is pleural cavity

Answer 10

It’s potential space, pleura stick together

Question 11

What happens when pressure outside the body and inside the body are equal

Answer 11

No air movement occurs

Question 12

When does volume decrease in the lungs

Answer 12

Pressure outside

Question 13

When does volume increase in the lungs

Answer 13

Pressure outside > pressure inside

Question 14

If pressure inside the body rises what happens to air flow

Answer 14

Air flows out

Question 15

What happens if pressure falls inside the body

Answer 15

Air flows in

Question 16

When does pneumothorax occur

Answer 16

When the lungs collapsed

Question 17

What happens during a Collasped lung

Answer 17

Hole in parietal pleura allows pleura cavity to fill with air

   - no longer potential space but an actual space 
   - air flows in
  - lungs recoil

Question 18

What happens when the lungs recoil

Answer 18

Alveoli can’t open

Pressure in pleural cavity is too great

Question 19

What’s the characteristic of voluntary control of breathing

Answer 19

Conscious effort

Question 20

What’s the characteristic of involuntary control of breathing

Answer 20

Breathing regulated by ANS & respiratory control center in medial oblongata

Chemoreceptors in arteries monitor CO2, O2, H+ concentration

High CO2 and H+ triggers reflex to increase breathing

Question 21

What precent of CO2 is bound to Hb

Answer 21

23%

Question 22

What precent of CO2 is dissolved in blood plasma

Answer 22

7%

Question 23

What percent of CO2 is converted to biocarbonic fluid

Answer 23

70%

Question 24

Carbonic acid is a reaction that occurs were

Answer 24

In RBC

Question 25

What does the mucus escalator consist of

Answer 25

Respiratory mucosa lines conducting portion

Cells produce mucus to catch particles

Cilia (hairs) sweep particles towards pharynx