Respiratory system

Question 1

Functions of the respiratory system

Answer 1

-ventilate the lungs
-extract oxygen from the air and transfer it to the bloodstream
-maintain the acid base balamce of the blood

Question 2

What composes inspired gas?

Answer 2

79% oxygen
20% O2
0.04% CO2
Water vapor/ trace gases

Question 3

What composes expired gas?

Answer 3

79% oxygen
16% O2
4% CO2
water vapor/trace gases

Question 4

How does gas exchange occur?

Answer 4

gas exchange occurs by diffusion

Question 5

Gas exchange

Answer 5

capillaries cover each alveolus
-carry deoxygenated blood to the alveolus and oxygenated blood away (capillary walls are thin)
-oxygen moves from the alveoli into the blood (opposite for CO2)

Question 6

Ficks law: The direction and movement of gas depends on…

Answer 6

-partial pressure of the gas in the blood and extra cellular fluid
-surface area avaliable for diffusion
-the thickness of the membrane the gas must go through
-diffusion constant of the gas

Question 7

Obstructive lung disease

Answer 7

conditions that make it hard to exhale all the air in the lungs
-main symptom is shortness of breath

Question 8

Restrictive lung disease

Answer 8

difficulty expanding their lungs with air
-main symptom is shortness of breath

Question 9

COPD

Answer 9

Chronic obstructive pulmoary disease
-chronic bronchitis and asthma

Question 10

Flow volume loops
-cut in half
-whole
-small

Answer 10

-obstructive
-normal
-restrictive