Chapter 21

Question 1

Which of the following airways is located between the larynx and primary bronchi?

Answer 1

Trachea

Question 2

Which of the following factors does not effect the rate of external respiration?

Answer 2

Volume of the alveolus

Question 3

Which of the following is not an necessary event to supply the body with oxygen and remove carbon dioxide?

Answer 3

Blood pH adjustment

Question 4

Air moves out of the lungs because:

Answer 4

the volume of the lungs decreases with expiration

Question 5

Most of the oxygen transported by the blood is:

Answer 5

bound to hemoglobin

Question 6

Surfactant prevents the alveoli from collapsing by:

Answer 6

interfering with the cohesiveness of of water molecules, thereby reducing the surface tension of the alveoli.

Question 7

Boyle’s law describes gas volume as which of the following?

Answer 7

Inversely proportional to pressure.

Question 8

The right lungs is divided into how many lobes?

Answer 8

3

Question 9

Which of the following results from inadequate surfactant production and is associated with alveolar collapse?

Answer 9

Respiratory distress syndrome.

Question 10

The larynx is made up of how many cartilages?

Answer 10

9

Question 11

Which of the following occurs when, a newborn, at birth takes its first breaths?

Answer 11

The pressure in the lungs decreases?

Question 12

Which of the following occurs in emphysema?

Answer 12

Destruction of the alveoli and bronchioles.

Question 13

Which of the following is a function of the nasal conchae?

Answer 13

To create turbulence in the air to trap small particulates in mucus.

Question 14

Which of the following is not a function of the nasal cavity?

Answer 14

Acting as a reservoir during coughing

Question 15

Which of the following cannot elevate the ribs?

Answer 15

External oblique

Question 16

The left lung consists of how many lobes?

Answer 16

2

Question 17

Which of the following are the main sites of gas exchange in the pulmonary tract?

Answer 17

Alveoli

Question 18

Sympathetic stimulation to the smooth muscle tissue layer in the bronchioles causes which of the following?

Answer 18

Bronchodilation

Question 19

The dead space has a volume of approximately:

Answer 19

150 mL.

Question 20

Which of the following is true about the glottis?

Answer 20

It is the opening to the larynx.

Question 21

Normal breathing is called:

Answer 21

eupnea

Question 22

Tension on the vocal cords is regulated by which of the following?

Answer 22

Intrinsic laryngeal muscles

Question 23

The average respiratory rate in a normal adult is:

Answer 23

12 to 15 respirations per minute.

Question 24

The primary bronchi are found near the level of which thoracic vertebra?

Answer 24

Fifth

Question 25

The relationship between pH and the hemoglobin saturation curve is called:

Answer 25

the Bohr effect

Question 26

The respiratory membranes consists primarily of which of the following?

Answer 26

Simple squamous epithelium

Question 27

Which of the following is true about the partial pressure of oxygen?

Answer 27

It is lower in the tissues