Respitory - Kafli 3

Question 1

Hvað er “other gases” mikið hlutfall af andrúmsloftinu?

Answer 1

1%

Question 2

What is the % of oxygen and carbon dioxide in the alveoli at sea level?

a. 15.5% and 6.6% respectively
b. 16.5% and 7.6% respectively
c. 14.0% and 5.3% respectively
d. 21.0% and 0.5% respectively

Answer 2

c. 14.0% and 5.3% respectively

Muna bara að alveoli = 14% oxygen

Question 3

On 100% oxygen at 40 000 feet, what height in the atmosphere does the partial pressure of oxygen in the alveoli equate to?

a. The same as at 20000 ft
b. The same as at 10000 ft
c. The same as at 25000 ft
d. The same as at 30000 ft

Answer 3

b. The same as at 10000 ft

Question 4

At what height is the partial pressure of oxygen in the lungs approximately half that at sea level?

a. 10000ft
b. 25000ft
c. 30000ft
d. 18000ft

Answer 4

a. 10000ft

Question 5

Why does cold make you more susceptible to hypoxia?

a. Heart beats faster which uses up more oxygen
b. More energy is required when shivering therefore more oxygen used
c. Lowers temperature of the body which makes it less efficient
d. Lowers temperature of the body and especially the head which has a debilitating effect on the brain

Answer 5

b. More energy is required when shivering therefore more oxygen used

Question 6

In flight someone complains of feeling alternately hot and cold, anxious, dizzy, tingling at the fingertips and is breathing rapidly. What may they be suffering from?

a. Hypoxic hypoxia
b. Formication
c. Cyanosis
d. Hyperventilation

Answer 6

d. Hyperventilation

Question 7

What are the times of useful consciousness at 20 000 ft (moderate activity):

a. 5 minutes
b. 1 minute
c. 10 minutes
d. 30 seconds

Answer 7

a. 5 minutes

Question 8

Hvaða reglum þarftu að fylgja ef þú hefur verið að scuba diving?

Answer 8

ef þú varst fyrir ofan 30ft þá 12 hours en annars 24 hours.

Question 9

Hvað er tidal volume?

Answer 9

the volume of air inhaled and exhaled with each normal breath

Question 10

The altitude that pressure will be half that of MSL in the standard atmosphere is..

Answer 10

18,000 ft.

Question 11

Henry’s Law has application in Human Performance to:

a. otic barotrauma
b. DCS
c. carbon monoxide poisoning
d. partial pressure in the alveoli

Answer 11

b. DCS

Question 12

Hver er algeng ástæða anaemic hypoxia?

Answer 12

smoking

Question 13

In commercial aircraft cabin pressure is normally maintained at:

a. sea level
b. 6000 - 8000 ft
c. 10000ft
d. below 5000 ft

Answer 13

b. 6000 - 8000 ft

Question 14

The “chokes” are associated with:

a. NIHL
b. DCS
c. blockage of the alveoli
d. oxygen loss

Answer 14

b. DCS

Question 15

Breathing 100% oxygen at 40 000 ft is equivalent of breathing normally at:
a. sea level
b. 20000ft
c. 40000ft
d 10000ft

Answer 15

d 10000ft

Question 16

What are the times of useful consciousness at 35 000 ft (at rest):

a. 5 minutes
b. 15 - 20 seconds
c. 2 minutes
d. 30 - 90 seconds

Answer 16

d. 30 - 90 seconds