The _______ is responsible for setting the basic rhythm of breathing.

The _______ is responsible for setting the basic rhythm of breathing.

Answer: VRG

Hemoglobin molecules are fully saturated when bound to _______ molecule(s) of O2

Hemoglobin molecules are fully saturated when bound to _______ molecule(s) of O2

Answer: 4

Why is the rate of CO2 exchange roughly equivalent to that of O2 despite its less steep pressure gradient?

Why is the rate of CO2 exchange roughly equivalent to that of O2 despite its less steep pressure gradient?

Answer: CO2 is more soluble in water than is O2.

When holding our breath for a long time we get the urge to breathe due to:

When holding our breath for a long time we get the urge to breathe due to:

a. a decrease in N2.
b. a decrease in O2.
c. an increase in CO2.
d. an increase in pH.

Answer: C

Which of the following has the greatest effect on respiration rate?

Which of the following has the greatest effect on respiration rate?

a. PO2
b. PCO2
c. PN2
d. Both a and b have an equal effect

Answer: B

The inflation reflex depends upon stimulation of which type of receptor?

The inflation reflex depends upon stimulation of which type of receptor?

a. Nociceptors
b. Chemoreceptors
c. Mechanoreceptors
d. Thermoreceptors

Answer: C