Exam 11: The Blood

During hyperventilation, arterial P_CO2 levels decrease because CO₂ is blown off more rapidly than it is being produced in the tissues.

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 -maximum volume of air that the lungs can hold

According to the law of LaPlace, the magnitude of the inward-directed collapsing pressure of a spherical bubble is directly proportional to both the surface tension and the radius of the bubble.

Which of these statements correctly describes vital capacity?

The respiratory quotient is the ratio of ____________________ to ____________________.

Which of the following does NOT occur when blood flow to an area of the lungs is reduced but the area receives normal air flow?

Which of these statements does NOT correctly describe haemoglobin?

Match the physiological factors, labelled a. through e., with the descriptions. (Options may be used more than once or not at all.) a.arterial P_O2 between 60 to 100 mmHg b.arterial P_O2 less than 60 mmHg c.arterial P_CO2 increased above normal d.brain ECF H⁺ increased above normal e.arterial H⁺ increased above normal -stimulates peripheral chemoreceptors as an emergency mechanism

At a constant temperature, the pressure that a gas exerts depends on the volume that it occupies.

Gases are transported during external respiration by active transport mechanisms.

The respiratory centre is located in the cerebral cortex.

The ____________________ pressure is the pressure exerted by the weight of the air in the atmosphere.

The inspiratory and expiratory neurons both display pacemaker activity.

What is the location of the brain region that provides output to the respiratory muscles?

Approximately what percentage of carbon dioxide is transported in the blood in dissolved form?

Match the physiological factors, labelled a. through e., with the descriptions. (Options may be used more than once or not at all.) a.arterial P_O2 between 60 to 100 mmHg b.arterial P_O2 less than 60 mmHg c.arterial P_CO2 increased above normal d.brain ECF H⁺ increased above normal e.arterial H⁺ increased above normal -weakly stimulates the peripheral chemoreceptors

Which of these statements correctly describes the percent of haemoglobin saturation?

Match the types of hypoxia, labelled a. through d., with the circumstances. (Options may be used more than once or not at all.) a.anaemic hypoxia b.circulatory hypoxia c.histotoxic hypoxia d.hypoxic hypoxia -cyanide poisoning

An increase of ____________________ ions in the arterial blood changes the respiratory rate by increasing it.

The peripheral chemoreceptors are not activated during carbon monoxide poisoning despite the fact that the total O₂ content in the blood can become lethally low.