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Flashcards in respiration,digestion,metabolism Deck (61)
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1

Into what region of the pharynx do auditory tubes open?

Nasopharynx

2

Phagocytic cells of the alveolus are the

alveolar macrophages.

3

Which is not correct about the left lung?

It has an esophageal depression.

4

Activation of sympathetic nerves that innervate lung tissue results in

bronchodilation.

5

During expiration, relaxation of the diaphragm and external intercostals

increases the pressure in the thoracic cavity.

6

An air passage (valley) beneath a turbinate within the nasal cavity is referred to as a

meatus.

7

Where would you find the trachealis muscle?

Between the esophagus and the trachea

8

Which statement is true regarding the location of the trachea?

It lies anterior to the esophagus, inferior to the larynx, and superior to the primary bronchi of the lungs.

9

How long is the average trachea?

12–14 cm

10

The main function of serous fluid is to

friction between pleural membranes around the lung.

11

Which bone does not contain a paranasal sinus?

Mandible

12

Terminal bronchioles of the lower respiratory system are lined with

simple cuboidal epithelium.

13

Foreign particles that are not filtered out by the respiratory epithelium are

collected by lymph nodes.

14

Which statement is true regarding secondary bronchi?

The left lung has two secondary bronchi and the right lung has three secondary bronchi.

15

The region of the nasal cavity immediately internal to the nostrils is the _________; it contains coarse guard hairs.

vestibule

16

These muscles increase thoracic cavity dimensions by elevating the first and second ribs during forced inhalation.

Scalenes

17

Maximum voluntary ventilation (MVV) is the greatest amount of air that can be

inspired and then expelled in 1 minute

18

What changes in the blood levels of respiratory gases result from hyperventilation?

Oxygen levels do not change but carbon dioxide levels fall.

19

Food is normally prevented from entering the nasopharynx by the

elevation of the soft palate.

20

What connects the pharynx to the trachea?

Larynx

21

At rest, a normal person breathes about _____ times per minute.

12

22

The hilum of the lung

is an indented area through which the bronchi, pulmonary vessels, lymphatic vessels, and nerves pass.

23

In addition to oxygen, hemoglobin also transports

carbon dioxide and hydrogen ions.

24

These muscles extend from a superior rib inferomedially to the adjacent inferior rib. They elevate the ribs upon contraction, thereby increasing the transverse dimensions of the thoracic cavity during inhalation.

External intercostals

25

The amount of air that can be forcibly inhaled after a normal inspiration is the

inspiratory reserve volume.

26

Which is not part of the conducting portion of the respiratory system?

Alveoli

27

What type of tissue lines the trachea?

Pseudostratified ciliated columnar epithelium

28

Tracheal cartilages provide for _______ on the ________ aspect of the trachea.

rigidity; anterior

29

Mucin _______ the viscosity of mucus, facilitating the ______ of dust and dirt particles.

increases; trapping

30

Mechanoreceptors and chemoreceptors are found in the

mucosa and submucosa of the GI tract along its length.