Respiration and Ventilation Quiz

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Which of the following factors contribute to bronchodilation?

Body temperature

CO2 levels in blood

pH levels in blood

Neural drive (correct)

What is the function of peripheral chemoreceptors?

Detect pH levels in blood

Detect hypoxia and hypercapnia (correct)

Detect neural drive

Detect body temperature

Where are the central chemoreceptors located?

Lungs

Brain (correct)

Peripheral chemoreceptors

Aortic arch

What is the normal blood pH at rest?

7.4 Signup and view all the answers

What is the formula for calculating alveolar ventilation (VA)?

VA = VT - VD Signup and view all the answers

What is the primary gas responsible for influencing pH levels in the body?

Carbon dioxide Signup and view all the answers

What is the effect of the Bohr effect on the affinity of oxygen for hemoglobin?

Decreases affinity Signup and view all the answers

What is the primary source of H+ ions in the body?

Lactic acid Signup and view all the answers

What is the primary form of CO2 transport in the blood?

As bicarbonate Signup and view all the answers

What happens to the a-vO2 difference during exercise?

Increases Signup and view all the answers

Which of the following is the definition of respiration?

The intake of oxygen and release of CO2 from oxidation of complex organic substances Signup and view all the answers

What is the definition of ventilation?

The exchange of air in the lungs Signup and view all the answers

What is the formula for minute ventilation (VE)?

VE = frequency * tidal volume Signup and view all the answers

What is the definition of hyperpnea?

Increased depth and rate of breathing Signup and view all the answers

What is the definition of 'ventilatory drift' and its function?

A rise in ventilation after a period of exercise Signup and view all the answers

What is the measure of gas exchange efficiency known as?

VD/VT ratio Signup and view all the answers

What is the VD/VT ratio at rest?

0.33 Signup and view all the answers

What factors can affect ventilation during exercise?

Work rate, fitness level, and RBCs amount Signup and view all the answers

What is the approximate oxygen concentration in room air?

21% Signup and view all the answers

What is the triphasic response during exercise?

A three-phase increase in ventilation Signup and view all the answers

During exercise, what happens to the A-a (alveolar to arterial) PO2 difference?

It increases Signup and view all the answers

What happens to the oxygen levels in the muscle during incremental exercise?

They plateau around 50% Signup and view all the answers

What happens to the oxygen extraction from blood during incremental exercise?

It decreases Signup and view all the answers

What happens to the venous blood saturation as workload increases during incremental exercise?

It decreases Signup and view all the answers

What is the atmospheric pressure at sea level?

760 mm Hg Signup and view all the answers

What is the definition of exercise-induced arterial hypoxemia (EIAH)?

A condition when O2 carried in arterial blood is severely reduced Signup and view all the answers

During exercise, what happens to the oxygen levels in the alveoli?

They increase Signup and view all the answers