Deck 37: Respiratory System Physiology

Question 1

The amount of air that can be forcefully exhaled after a normal tidal volume exhalation is called the .

A)tidal volume
B)expiratory reserve
C)inspiratory reserve
D)vital capacity

Answer 1

B

Question 2

To measure forced vital capacity (FVC)and forced expiratory volume (FEVT), the subject should .

A)exhale as much air as possible, then inhale as much air as possible
B)take a deep inspiration, then rapidly and forcefully exhale as much air as possible
C)take a deep inspiration, then calmly and carefully exhale as much air as possible

Answer 2

B

Question 3

Carbon dioxide (CO2)from tissue cells forms when combined with water. This compound dissociates into H+ and , and participates in an important buffering system in the blood.

A)hydrochloric acid, Cl-
B)carbonic acid, HCO3-
C)carbonic acid, CO₃ D)hydrochloric acid, bicarbonate ions

Answer 3

B

Question 4

Nervous system centers set the normal resting rate and depth of respiration. Which factors below can alter this normal respiratory rate and depth?

A)changes in the pH of the blood
B)changes in blood CO2 levels
C)exercise, changes in blood CO2 levels, and changes in the pH of the blood
D)exercise

Question 5

Select the correct sequence of events that occur during inspiration.

A)external intercostals and diaphragm contract, size of thoracic cavity increases, gas pressure in the lungs decreases, air flows in
B)external intercostals and diaphragm contract, size of thoracic cavity increases, gas pressure in the lungs increases, air flows in
C)internal intercostals and diaphragm contract, size of thoracic cavity increases, gas pressure in the lungs decreases, air flows in
D)internal intercostals and diaphragm contract, gas pressure in the lungs decreases, size of thoracic cavity increases, air flows in

Question 6

Once you have measured TV, IRV, and ERV, you can calculate all the following capacities except .

A)inspiratory capacity
B)vital capacity
C)functional residual capacity

Question 7

Vesicular breathing sounds probably result from .

A)air rushing through the large respiratory passageways
B)air filling the alveolar sacs
C)air moving through the bronchioles

Question 8

Tidal volume is .

A)the amount of air that can be forcefully inhaled after a normal inhalation
B)the amount of air that can be forcefully exhaled after a normal exhalation
C)the amount of air inhaled or exhaled with each resting breath
D)the maximum amount of air that can be exhaled after a maximal inspiration

Question 9

The function of the carbonic acid- bicarbonate buffer system in the blood is to _ .

A)aid in the moving O2 into the blood
B)help stabilize arterial blood pH
C)aid in expelling CO2 from the blood

Question 10

In testing a patient who has tuberculosis, you would expect that the .

A)FVC will be increased
B)FEVT will be increased
C)FEV_T will in decreased
D)FVC will be decreased

Question 11

An average value for vital capacity in healthy young adult males is .

A)6000 ml
B)4800 ml
C)3000 ml
D)500 ml

Question 12

Vesicular breath sounds may be heard _.

A)at the triangle of auscultation
B)on the throat below the larynx, over the sternum, and at the triangle of auscultation
C)on the throat below the larynx
D)over the sternum

Question 13

Minute respiratory volume can be computed if one knows _ and .

A)inspiratory capacity; respiratory rate
B)tidal volume; respiratory rate
C)expiratory reserve volume; tidal volume
D)vital capacity; height

Question 14

Inspiration is the time during which .

A)air passes out of the lungs
B)air is taken into the lungs
C)air passes from the alveoli into the conducting passageways
D)air is taken into the nasal passageways

Question 15

The vital capacity, or maximal amount of air that one can move, is the sum of .

A)inspiratory capacity and residual volume
B)inspiratory capacity and functional residual capacity
C)inspiratory reserve volume and functional residual capacity
D)inspiratory reserve volume, tidal volume, and expiratory reserve volume

Question 16

During inspiration, the volume of the lungs .

A)increases
B)decreases
C)remains the same

Question 17

These muscles are active during expiration.

A)external intercostals
B)no muscles are active during quiet breathing; expiration is a passive process
C)internal intercostals
D)diaphragm

Question 18

After you measure TV and vital capacity, you must also calculate before you can determine total lung capacity.

A)inspiratory capacity
B)expiratory reserve volume
C)residual volume
D)inspiratory volume