From largest to smallest, the correct sequence for the following passageways is

bronchi, bronchioles, terminal bronchioles, respiratory bronchioles, alveoli.

bronchi, bronchioles, respiratory bronchioles, terminal bronchioles, alveoli.

bronchioles, terminal bronchioles, respiratory bronchioles, bronchi, alveoli.

alveoli, bronchioles, terminal bronchioles, respiratory bronchioles, bronchi.

terminal bronchioles, respiratory bronchioles, bronchi, bronchioles, alveoli.

Constriction of smooth muscle in the bronchioles

restricts the flow of air into the lungs.

occurs during periods of exercise.

increases airflow out of the lungs.

Which of the following statements regarding the lungs is correct?

The left lung contains two lobes, while the right lung contains three lobes.

The left lung is larger than the right lung.

The left lung has more bronchopulmonary segments than the right lung.

Only the right lung has a hilum.

The left lung contains three lobes, while the right lung contains two lobes.

When the inspiratory muscles contract,

the alveolar pressure increases.

Which of the following statements concerning thoracic volume is true?

As alveolar volume increases, alveolar pressure (Palv) decreases.

As thoracic volume increases, alveolar pressure (Palv) increases.

In expiration, the thoracic volume increases.

Constriction of bronchioles assists breathing.

Pressure is directly proportional to volume.

For air to flow into or out of the lungs, there must be

a pressure gradient established between the atmosphere and the alveoli.

a volume gradient established between the atmosphere and the alveoli.

a temperature gradient between the atmosphere and the alveoli.

a diffusion gradient between the atmosphere and the alveoli.

None of the choices are correct.

During expiration, the alveolar pressure must be

greater than atmospheric pressure.

less than atmospheric pressure.

None of these choices is correct.

Which of the following factors keeps the alveoli expanded?

Alveolar pressure being equal to atmospheric pressure

Negative intra-alveolar pressure

The chloride shift refers to the

exchange of Cl- for bicarbonate ions across the red blood cell membrane.

A) effect of Cl- on the O2 dissociation curve.

exchange of Cl- for CO2 across alveolar cell membranes.

effect of Cl- on H+ diffusion from red blood cells.

If there is an accumulation of acidic products in the plasma, one would expect __________.

an increase in respiration rate

no influence on respiration rate

The pontine respiratory neurons

play a role in switching between inspiration and expiration.

are located in the medulla oblongata in the brain.

are active only during inspiration.

are active only during expiration.

is essential for respiratory rhythm.

When CO2 levels in the blood increase, the

condition is called hypocapnia.

number of hydrogen ions in the blood decreases.

After hyperventilating for several minutes, a person may develop short periods of apnea because

the level of CO2 decreases below the level necessary to stimulate the inspiratory center.

blood pH would drop and inhibit inspiration.

oxygen in the lungs has not had time to diffuse into the blood.

the level of oxygen has increased and inhibits the inspiratory center.

blood pH will rise and stimulate expiration.

AP 2 Mod 7 Review exam 3 Quiz

32 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Pulmonary (external) respiration refers to

atmospheric air coming into the lungs.

gas exchange between the lungs and the blood.

gas exchange in the atmosphere.

gas exchange between the blood and body tissues.

cellular respiration.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Trachea

Larynx

Pharynx

Bronchus

Esophagus

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AP 2 Mod 7 Review exam 3

Pulmonary (external) respiration refers to

A protective function of the respiratory system would be

Which of the following is NOT a function of the respiratory system?

Which of the following is NOT a process of respiration?

Which of the following is part of the upper respiratory tract?

Which of the following functions is associated with the nose?

Which of the following is a passageway for both air and food?

During swallowing, the opening into the larynx is covered by the_________.

The respiratory zone of the tracheobronchial tree includes which of the following?

Of the following structures, the largest in diameter is the_________.

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