Carbon Dioxide Transport

Question 1

High carbon dioxide concentration in body fluids is called
A. carbonation.
B. hyperdioxia.
C. hyperoxia.
D. hypercarbia.
E. hypercapnia.

Answer 1

E

Question 2

Most of the carbon dioxide in the blood is transported as
A. solute dissolved in the plasma.
B. carbaminohemoglobin.
C. bicarbonate ions.
D. solute dissolved in the cytoplasm of red blood cells.
E. carbonic acid.

Answer 2

C

Question 3

The chloride shift occurs when
A. hydrogen ions leave the red blood cells.
B. hydrogen ions enter the red blood cells.
C. bicarbonate ions leave the red blood cells.
D. carbonic acid is formed.
E. oxyhaemoglobin is formed

Answer 3

C

Question 4

Hyperventilation will lead to
A. Hypocapnia
B. Hypercapnia
C. Respiratory acidosis
D. Respiratory alkalosis
E. A and D

Answer 4

E (A and D)

Question 5

Jude has a bet with a friend that he can swim to the other end of the
pool without taking a breath. Jude deliberately hyperventilates for
several minutes before diving into a swimming pool. Shortly after he
enters the water and begins swimming, loses consciousness and almost
drowns. Why did he lose consciousness?

Answer 5

Hyperventilation decreases the alveolar PCO2 Levels
This reduces the bodies drive for ventilation
When the body is under water, muscles are using the remaining O2 inducing hypoxia
When this deprivation of O2 reaches the brain consciousness is lost

Question 6

What effect does hyperventilation have on the pH of the body?

Answer 6

Hyperventilation decreases PCO2, called hypocapnia, thus decreasing HCO3- and H+, thus alkalosis occurs