Chapter 23 Open book assignment

Mr. Huff and Puff exhales normally; then, using forced expiration, he exhales as much air as possible. The volume of air still remaining in his lungs is called

• expiratory reserve volume.

• tidal volume.

• inspiratory reserve volume.

• vital capacity.

• residual volume.

Tags

NGSS.HS-LS2-5

If the total pressure of a mixture of gases was 760 mm Hg and its composition is 20% oxygen, 0.04% carbon dioxide, 75% nitrogen, and 5% water vapor, then the partial pressure of oxygen would be

• 740 mm Hg.

• 20 mm Hg.

• 148 mm Hg.

• 152 mm Hg.

• 200 mm Hg.

Which of the following results in an increase in shunted blood (blood not completely oxygenated)?

• exercise

• pulmonary edema

• increased heart rate

• increased respiration rate

• None of these choices is correct.

How does carbon monoxide affect red blood cells (RBCs)?

• It causes them to shrivel.

• The hemoglobin within the RBC bind to carbon monoxide.

• The hemoglobin rejects carbon monoxide.

• The RBCs clump together.

• The carbon monoxide converts to carbon dioxide.

The chloride shift refers to the

• effect of chloride ions on the oxygen dissociation curve.

• exchange of chloride ions for bicarbonate ions across the red blood cell membrane.

• exchange of chloride ions for carbon dioxide across alveolar cell membranes.

• effect of chloride ions on hydrogen ion diffusion from red blood cells.

• exchange of chloride ions for hemoglobin across the RBC membrane.

Direct stimulation of neurons within the dorsal respiratory group would cause an increase in the frequency of action potential in the

• glossopharyngeal nerve that innervates the pharyngeal muscles.

• phrenic nerve that innervates the diaphragm.

• vagus nerve that innervates the smooth muscle of the bronchioles.

• intercostal nerves to internal intercostals muscles.

• intercostal nerves to external intercostals muscles.

Tags

NGSS.HS-LS1-3

The ventral respiratory group

• is located in the pons.

• stimulates the intercostal and abdominal muscles.

• is part of the pontine respiratory group.

• is active only in exhalation.

• stimulates the diaphragm.

Tags

NGSS.HS-LS1-3

Which of the following structures opens directly into the nasal cavity?

• paranasal sinuses

• auditory tubes

• lacrimal glands

• fauces

• epiglottis

A molecule of air enters the nose through the external nares. Which of the following is the correct pathway to the trachea?

• nasal cavity, larynx, pharynx, trachea

• oral cavity, nasal cavity, larynx, pharynx, trachea

• nasopharynx, nasal cavity, laryngopharynx, trachea

• nasal cavity, pharynx, larynx, trachea

• nasal cavity, trachea, larynx, pharynx

The largest of the laryngeal cartilages is the

• epiglottis.

• thyroid cartilage.

• cricoid cartilage.

• corniculate cartilage.

• cuneiform cartilage.