Which of the following causes an increased ventilation of the lungs? A. Decrease

Question

Which of the following causes an increased ventilation of the lungs?

A.       Decreased CO2 in the blood

B.       Increased CO2 in the blood

C.       Increased PO2 of arterial blood

D.       Increased pH of the blood (decreased hydrogen ion concentration)

Diving or falling into very cold water will reflexively:

A.       Make you take a deep breath

B.       Slow HR and stop respiration

C.       Increase HR and heat production

D.       Cause your knee to jerk

The connection neurons for the baroreceptor reflexes are in the:

A.       Cartotid sinuses

B.       Aortic arch

C.       Medulla oblongata

D.       Right atrium

A physically fit person would most likely have a higher _____ than a couch potato:

A.       SV

B.       HR

Atrial and ventricular diastole overlap during?

A.       P - R interval

B.       R - T interval

C.       T - P interval

D.       None of the above

Explanation / Answer

(1)

C. Increased PO2 of arterial blood

A. Decreased CO2 in the blood

D. Increased pH of the blood (decreased hydrogen ion concentration)

hyperventilation is caused due to increase in PO2 and decrease in PCO2. One of the most common causes of hyperventilation is respiratory alkalosis. When the body receives more oxygen than it needs, it results in respiratory alkalosis (high pH).

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