Exam 11: The Blood

Which one of these situations occurs if the oxygen-haemoglobin dissociation curve is shifted to the right?

The primary factor that determines the percent Hb saturation is the ____________________.

The residual volume is the amount of air remaining in the lungs at the end of a normal expiration.

The respiratory system provides a route for water and heat elimination.

Which one of these factors would decrease the diffusion of a gas across the alveolar/pulmonary capillary membrane?

The partial pressure of a gas in blood depends on the amount that is physically dissolved and not on the total content of the gas present in the blood.

Match the lung volume/capacity terms, labelled a. through m., with the descriptions. (Options may be used more than once or not at all.) a.vital capacity b.respiratory rate c.FEV₁ d.tidal volume e.residual volume f.total lung capacity g.functional residual capacity h.alveolar ventilation i.pulmonary ventilation j.inspiratory reserve volume k.expiratory reserve volume l.inspiratory capacity m.anatomic dead space volume -volume of air in the lungs at the end of a normal passive expiration

The 500 mL of air that is inspired is the same 500 mL of air that enters the alveoli during a single breath.

Match the lung volume/capacity terms, labelled a. through m., with the descriptions. (Options may be used more than once or not at all.) a.vital capacity b.respiratory rate c.FEV₁ d.tidal volume e.residual volume f.total lung capacity g.functional residual capacity h.alveolar ventilation i.pulmonary ventilation j.inspiratory reserve volume k.expiratory reserve volume l.inspiratory capacity m.anatomic dead space volume -volume of air in the respiratory airways

Describe the mechanics of ventilation.

Which of these statements is correct when outward airflow has ceased at the end of a normal expiration?

A molecule of nitrogen gas exerts more pressure than a molecule of oxygen gas because nitrogen gas is a larger molecule.

Which of these statements correctly describes intrapulmonary pressure?

Pulmonary surfactant contributes to lung stability by ____________________ the surface tension.

What is the respiratory quotient?

The most important factor controlling respiration is the P_O2 of arterial blood.

Describe how haemoglobin's saturation behaviour varies.

Which of these statements does NOT correctly describe haemoglobin?

The ____________________ nerve supplies the diaphragm.

If a person is breathing rapidly, it is safe to assume that he or she is getting adequate ventilation.