Ch. 23 Hw

Question 1

Which of the following is not part of the upper respiratory system?

Answer 1

trachea

Question 2

what is part of the upper respiratory system?

Answer 2

nasal cavities, laryngopharynx, oropharynx, and nasal meatuses

Question 3

What are conduction zone action?

Answer 3

clean air of debris, conduct air into the lungs, add water to air, and warm air

Question 4

Which of the following is a factor that determines the rate of pulmonary and systemic gas exchange?

Answer 4

partial pressure difference of gases, surface area availability for gas exchange, diffusion distance, and molecular weight and solubility of the gases

Question 5

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

Answer 5

pharynx

Question 6

Which structure prevents food or water from entering the larynx?

Answer 6

epiglottis

Question 7

The gas law that describes the pressure changes that occur during pulmonary ventilation is

Answer 7

boyle’s law

Question 8

Which of the following is the primary gas exchange site?

Answer 8

alveolus

Question 9

Which of the following are cells of the pulmonary alveoli that produce surfactant?

Answer 9

type II alveolar cells

Question 10

Which of the following is a factor that affects pulmonary ventilation?

Answer 10

lung compliance, surface tension of the alveolar fluid, elastic recoil of the chest wall and lungs, airway resistance

Question 11

Which of the following indicates the direction of diffusion of gases at the pulmonary alveoli of the lungs?

Answer 11

oxygen into blood, carbon dioxide out of blood

Question 12

Which of the following is the dominant method of carbon dioxide transport in blood?

Answer 12

dissolved in plasma as bicarbonate ions

Question 13

When blood pH drops, the amount of oxyhemoglobin ____ and oxygen delivery to the tissue cells _____

Answer 13

decreases; increases

Question 14

Which of the following is a factor that does not affect hemoglobin’s affinity for oxygen?

Answer 14

respiratory rate

Question 15

Which of the following is a factor that does affect hemoglobin’s affinity for oxygen?

Answer 15

pH of blood, partial pressure of the oxygen, amount of oxygen available, and temperature

Question 16

Where is the rhythmicity center for respiration?

Answer 16

medulla oblongata

Question 17

With which body system does the respiratory system work to regulate the pH of body fluids?

Answer 17

urinary

Question 18

Which structure is located anterior to the esophagus and carries air to the bronchi?

Answer 18

trachea

Question 19

Exhalation begins when

Answer 19

Inspiratory muscles relax

Question 20

Which of the following is the sum of the residual and the expiratory reserve volume?

Answer 20

functional residual capacity

Question 21

Which structure removes fine particles and debris within the alveolar space?

Answer 21

alveolar macrophages

Question 22

The most important factor that determines the percent of oxygen saturation of hemoglobin is

Answer 22

partial pressure of oxygen- Po2

Question 23

During quiet inhalation, which respiratory muscles contract?

Answer 23

diaphragm and external intercostals

Question 24

The volume of one breath is called the

Answer 24

tidal volume

Question 25

After holding our breath briefly, what eventually forces us to take a breath?

Answer 25

increasing in carbon dioxide levels