Physio Exam 4 Lect. 1

Question 1

PCO2 > 45

Answer 1

Respiratory Acidosis
- Obstruction, Poor gas exchange
- Hypoventilation

Question 2

PCO2 < 35

Answer 2

Respiratory Alkalosis
Hyperventilation

Question 3

HCO3- <22 mEq

Answer 3

Metabolic Acidosis
- Causes - High alcohol, excess HCO3- loss (diarrhea), accumulation of lactic acid, Renal failure

Question 4

HCO3- > 26 mEq

Answer 4

Metabolic Alkalosis
- Causes - Excess Loss of H+(Vomiting), excess intake of base (antacids), and constipation (excess HCO3- reabsorption)

Question 5

Grahams Law

Answer 5

rate of diffusion of a gas through a liquid is directly proportional to its solubility coefficient

• Inversely proportional to square root of its MW

Question 6

Ficks Law

Answer 6

Rate of diffusion is proportional to area, diffusion coefficient and partial pressure difference.

• Inversely proportional top distance/thickness

Question 7

Henrys Law

Answer 7

the dissolved gas in a liquid proportional to its partial pressure and a solubility coefficient in that liquid.

Question 8

Exchange of O2 and CO2 :

Answer 8

FLOW

Question 9

Flow

Answer 9

Respiratory rate x Tidal Volume
= 12-18/min x 0.6L
= 10L/min

Question 10

Increase Flow

Answer 10

Alkalosis, hyperoxia (smaller effect of respiratory rate)

Question 11

Decrease Flow

Answer 11

Acidosis, anoxia