The Respiratory System: T Or F

Front 1

The alveoli are formed of delicate elastic membranes covered by an extensive capillary network of the "systemic" circulation.

Back 1

False, pulmonary

Front 2

The normal route by which air enters the respiratory system is the "mouth."

Back 2

False, nose

Front 3

Openings from the nasal cavities called "sinuses" extend into several bones of the skull.

Back 3

True

Front 4

The air is warmed, moistened, and filtered as it passes through the "mouth."

Back 4

False, nose

Front 5

The condition known as allergic rhinitis is often refered to as "asthma."

Back 5

False, hay fever

Front 6

The Eustachian tubes are used to equalize the air pressure between the nasopharynx and "inner ear."

Back 6

False, middle ear

Front 7

At its distal end, the pharynx branches into two tubes called the "esophagus" and the larynx.

Back 7

True

Front 8

The largest cartilage of the larynx is the "cricoid cartilage," also known as the Adam's apple.

Back 8

False, thyroid cartilage

Front 9

The vocal chords, which function in the production of sound, are located within the "trachea."

Back 9

False, larynx

Front 10

The trachea is held open by a series of C-shaped rings of "bone" stacked upon one another.

Back 10

False, cartilage

Front 11

The bronchioles are composed entirely of "skeletal" muscle supported by connective tissue.

Back 11

False, smooth

Front 12

The two-layer membrane that surrounds each lung is known as the "peritoneum."

Back 12

False, pleura

Front 13

The bronchus that is slightly larger and more vertical is the "left" bronchus.

Back 13

False, right

Front 14

Expansion of the lungs is due in part to contractions taking place in the "diaphragm" muscle.

Back 14

True

Front 15

The expansion of the lungs increases the volume of the lungs and "raises" the air pressure within the lungs.

Back 15

False, lowers

Front 16

During the process of expiration, the respiratory muscles undergo "contraction," and the thoracic returns to its original shape.

Back 16

False, relaxation

Front 17

The resting tidal volume of the lungs during a normal breath is about "500 mL" of air.

Back 17

True

Front 18

The "vital capacity" is the largest volume of air that can be expired from the lungs after a forceful inspiration.

Back 18

True

Front 19

The respiratory control center for the lungs is located in a portion of the "heart."

Back 19

False, brain

Front 20

An increase of carbon dioxide in the blood causes a corresponding "decrease" in the concentraion of hydrogen ions.

Back 20

False, increase

Front 21

Nerve impulses originating in the "cerebellum" can override the activity of the respiratory center in regulating breathing.

Back 21

False, cerebral cortex

Front 22

The "least" amount of carbon dioxide is transported in the blood as bicarbonate ions.

Back 22

False, most

Front 23

The passive process known as "osmosis" accounts for the movement of oxygen and carbon dioxide gas across the capillary membranes of alveoli.

Back 23

False, diffusion

Front 24

For transport to the body's cells, oxygen molecules bind loosely to "hemoglobin" molecules contained in red blood cells.

Back 24

True

Front 25

As they leave the area of the alveoli, capillaries join together to form pulmonary "venules."

Back 25

True