Clicker Qs

Question 0

Acidosis occurs when the ratio of bicarbonate ion to carbon dioxide in the extracellular fluid decreases. When this change is due to a decrease in bicarbonate ion, it is called respiratory acidosis
True
False

Answer 0

False

Question 1

The volume by which the lungs and thorax incrase for each unit of pressure change in the transpulmonary pressure is referred to as 
Tidal volume 
Inspiratory pressure
Compliance
Transpulmonary volume
Elasticity

Answer 1

Compliance

Question 2

During heavy exercise blood flow through the lungs increases four to sevent times that at rest. This incrase is due to which of the following?
Increase in the number of open capilaries up to three times normal
Distension of capillaries and a doubling in the flow rate
Incrase in pulmonary arterial pressure
All the above
Only A and B

Answer 2

All the above

Question 3

The Va/Q ratio is zero (0) under which of the following conditions?
Va=Infinity, but Q = 1
Va = infinity, but Q = 0
Va = 0, put perfusion >0
Va> 0 , but Q = 0

Answer 3

Va = 0, put perfusion >0

Question 4

According to the oxygen-hemoglobin dissociation curve, an increase in blood partial oxygen pressure will have which of the following effects?
A decrease in bound oxygen
An increase in bound oxygen
No change in bound oxygen
There is no correlation between the two variables

Answer 4

An increase in bound oxygen

Question 5

Reduction of blood flow to a portion of the lung has which of the following effects?
Alveolar pCO2 is lowered, resulting in a constriction of the bronchi supplying that portion of the lung
Alveolar pCO2 is elevated, resulting in a constriction of the bronchi supplying that portion of the lung
Alveolar pCO2 is lowered, resulting in a dilation of the bronchi supplying that portion of the lung
Alveolar pCO2 is elevated, resulting in a constriction of the bronchi supplying that portion of the lung

Answer 5

Alveolar pCO2 is lowered, resulting in a constriction of the bronchi supplying that portion of the lung

Question 6

One gram of hemoglobin can bind to how much oxygen?

19. 4 ml oxygen
20. 4 ml oxygen
21. 25 ml oxygen
22. 34 ml oxygen

Answer 6

1.34

Question 7

Above an intracellular PO2 of 1 mm Hg, the limiting factor for cellular chemical reactions is which of the following?
pO2
pCO2
bi phosphoglycerate
ADP

Answer 7

ADP

Question 8

Most potassium reabsorption occurs at which of the following sites?

Answer 8

Proximal convoluted tubule

Question 9

Which of the following cells play a major role in the secretion of potassium

Answer 9

Principal cells

Question 10

Which of the following plays a major role in stimulating potassium excretion by the kidney tubules

Answer 10

Aldosterone

Question 11

Approximately how much of the body’s supply of calcium is stored in bone?

Answer 11

99%

Question 12

How much of filtered calcium is excreted by the kidneys?

Answer 12

1%

Question 13

Which of the following cells reabsorb potassium during potassium depletion?

Answer 13

Intercalated cells

Question 14

A high potassium intake would have which of the following effects on potassium excretion associated with increased renal tubular flow rate?

Answer 14

There would be little effect

Question 15

Which of the following describes a valid change in potassium distribution due to an acid-base abnormality?

Answer 15

Metabolic acidosis increases extracellular K+ concentration