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Chapter C7. Il sistema respiratorio

10 esercizi

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Ventilation and transport of gases

Which of these statements correctly goes with expiration rather than inspiration?

A: The rib cage moves up and out.

B: The diaphragm relaxes and moves up.

C: Pressure in the lungs decreases, and air comes rushing out.

D: The diaphragm contracts and lowers.

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Gas-exchange surfaces

Internal respiration refers to

A: the exchange of gases between the air and the blood in the lungs.

B: the movement of air into the lungs.

C: the exchange of gases between the blood and tissue fluid.

D: cellular respiration, resulting in the production of ATP.

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Gas-exchange surfaces

Which is a requirement for a body respiratory surface?

A: a high surface-area-to-volume ratio

B: plentiful supply of water in the environment

C: low metabolic activity

D: thin, moist body wall

E: cilindric cells covered with chitin

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Gas-exchange surface

If the digestive and respiratory tracts were completely separate in humans, there would be no need for

A: swallowing.

B: a nose.

C: an epiglottis.

D: a diaphragm.

E: All of these are correct.

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Ventilation and transport of gases

Air enters the human lungs because

A: atmospheric pressure is lower than the pressure inside the lungs.

B: atmospheric pressure is greater than the pressure inside the lungs.

C: although the pressures are the same inside and outside, the partial pressure of oxygen is lower within the lungs.

D: the residual air in the lungs causes the partial pressure of oxygen to be lower than it is outside.

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Gas-exchange surfaces

Which of these statements is anatomically incorrect?

A: The nose has two nasal cavities.

B: The pharynx connects the nasal cavity and the mouth to the larynx.

C: The larynx contains the vocal cords.

D: The trachea enters the lungs.

E: The lungs contain many alveoli.

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Gas-exchange surfaces

Food and air both travel through the

A: lungs.

B: pharynx.

C: larynx.

D: trachea.

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Gas-exchange surfaces

One problem faced by terrestrial animals with lungs, but not by freshwater aquatic animals with gills, is that

A: gas exchange involves water loss.

B: breathing requires considerable energy.

C: oxygen diffuses very slowly in air.

D: the concentration of oxygen in water is greater than that in air.

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Ventilation and transport of gases

In humans, the respiratory control center

A: is located in the medulla oblongata.

B: controls the rate of breathing.

C: is stimulated by hydrogen ion concentration.

D: All of these are correct.

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Ventilation and transport of gases

The chemical reaction that converts carbon dioxide to a bicarbonate ion takes place in

A: the blood plasma.

B: red blood cells.

C: the alveoli.

D: the hemoglobin molecule.

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