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Respiratory System

Total questions: 84

Worksheet time: 45mins

Name
Class
Date
1.

Which organs make up the respiratory system?

a)

Heart and blood vessels

b)

Lungs and air passages

c)

Stomach and intestines

d)

Kidneys and bladder

2.

What is the main function of the respiratory system?

a)

Digests food

b)

Takes in oxygen and removes carbon dioxide

c)

Pumps blood

d)

Produces hormones

3.

Fill in the blank: The body only has a ____ minute supply of oxygen, so the respiratory system must work continuously.

a)

4-6

b)

10-12

c)

20-30

d)

1-2

4.

What are the two openings through which air enters the nasal cavity called?

a)

Turbinates

b)

Nostrils or nares

c)

Adenoid area

d)

Palate

5.

What is the function of the nasal septum?

a)

Warms the air

b)

Divides the nose into right and left nasal cavities

c)

Traps dirt particles

d)

Produces mucous

6.

Fill in the blank: The nasal cavities are hollow spaces that are lined with _______ membranes, which trap pathogens and dirt and moisten air.

a)

mucous

b)

serous

c)

synovial

d)

cutaneous

7.

What is the role of cilia in the nasal cavity?

a)

Divide the nose

b)

Trap larger dirt particles and move mucous toward the esophagus

c)

Warm the air

d)

Produce blood supply

8.

Sinuses are ______ in the skull.

a)

cavities

b)

muscles

c)

nerves

d)

joints

9.

What area do the sinuses surround?

a)

the nasal area

b)

the ear canal

c)

the eye socket

d)

the jawbone

10.

Sinuses are connected to nasal cavities by:

a)

Long tubes

b)

Short ducts

c)

Blood vessels

d)

Nerves

11.

The mucous membrane lining the sinuses helps to ______ and ______ air.

(a)  

12.

Sinuses provide resonance for the voice.

a)

True

b)

False

13.

The pharynx is also known as the ______ and lies directly behind the nasal cavities. It is 5 inches long.

a)

throat

b)

larynx

c)

esophagus

d)

trachea

14.

What is the common passageway for air and food?

a)

Trachea

b)

Pharynx

c)

Esophagus

d)

Larynx

15.

When food is swallowed, the ______ closes over the opening to the larynx, preventing food from entering the lungs.

a)

epiglottis

b)

trachea

c)

esophagus

d)

pharynx

16.

The oropharynx is located posterior to the ________ (oral cavity).

a)

mouth

b)

nose

c)

larynx

d)

esophagus

17.

Which part of the pharynx contains adenoids (pharyngeal tonsils) and Eustachian tube openings?

a)

A) Nasopharynx

b)

B) Oropharynx

c)

C) Laryngopharynx

18.

The laryngopharynx branches into the ________ and esophagus.

a)

larynx

b)

trachea

c)

pharynx

d)

bronchi

19.

Which part of the pharynx receives air from the nasopharynx and both air and food from the mouth?

a)

Nasopharynx

b)

Oropharynx

c)

Laryngopharynx

20.

What is the larynx also known as?

a)

Windpipe

b)

Voice box

c)

Esophagus

d)

Adam's apple

21.

How many folds does the larynx contain?

a)

1

b)

2

c)

3

d)

4

22.

What covers the larynx during swallowing?

a)

Tongue

b)

Epiglottis

c)

Vocal cords

d)

Glottis

23.

The largest cartilage plate in the larynx is known as the _________.

a)

Adam's apple

b)

Cricoid cartilage

c)

Epiglottis

d)

Arytenoid cartilage

24.

Refer to the diagram. Which structure is responsible for producing sound by vibrating?

a)

Epiglottis

b)

Vocal cords

c)

Trachea

d)

Esophagus

25.

What is another name for the trachea?

a)

Windpipe

b)

Esophagus

c)

Bronchus

d)

Alveoli

26.

The trachea carries air from the ______ to the bronchi.

a)

larynx

b)

esophagus

c)

pharynx

d)

alveoli

27.

What keeps the trachea open and more rigid?

a)

Smooth muscle

b)

C shaped rings of hyaline cartilage

c)

Blood vessels

d)

Alveoli

28.

The trachea is lined with ______ mucous membrane.

a)

ciliated

b)

stratified

c)

squamous

d)

cuboidal

29.

Coughing and expectoration are functions related to which part of the respiratory system?

a)

Larynx

b)

Trachea

c)

Alveoli

d)

Diaphragm

30.

What does the lower end of the trachea divide into?

a)

Two alveoli

b)

Right and left bronchi

c)

Two pleura

d)

Two diaphragms

31.

What is the function of the bronchi?

a)

Carry blood from the heart to the lungs

b)

Carry air from the trachea to alveoli in lungs

c)

Produce pleural fluid

d)

Control diaphragm movement

32.

The bronchi keep dividing into tiny ________, which end in alveoli.

a)

bronchioles

b)

capillaries

c)

arterioles

d)

tracheoles

33.

Which bronchus is shorter, wider, and extends more vertically than the other?

a)

The right bronchus

b)

The left bronchus

c)

The middle bronchus

d)

The superior bronchus

34.

Which of the following best describes the structure of alveoli?

a)

Thick-walled sacs made of muscle tissue

b)

Clusters of thin-walled sacs made of single layer epithelial tissue with a rich blood supply of capillaries

c)

Solid masses of bone tissue

d)

Glands that secrete hormones

35.

The inner surfaces of alveoli are covered with ________ to keep them from collapsing.

a)

surfactant (lipid/fatty substance)

b)

mucus

c)

water

d)

hemoglobin

36.

O2 and CO2 exchange takes place between the alveoli and capillaries by diffusion.

a)

True

b)

False

37.

Which part of the respiratory system is directly connected to the alveolar sacs?

a)

Terminal Bronchiole

b)

Pulmonary Arteriole

c)

Respiratory Bronchiole

d)

Trachea

38.

What organ contains the bronchi and alveoli?

a)

Lungs

b)

Heart

c)

Liver

d)

Kidneys

39.

How many lobes does the right lung have?

a)

3 lobes

b)

2 lobes

c)

4 lobes

d)

5 lobes

40.

How many lobes does the left lung have?

(a)  

41.

Which lung is larger and shorter, and is displaced by the liver?

(a)  

42.

Which lung is smaller and displaced by the heart?

(a)  

43.

Lung tissue is porous and spongy, and it floats.

a)

True

b)

False

44.

Which of the following is NOT a function or characteristic of the lungs?

a)

Contains the bronchi and alveoli

b)

Fills the thoracic cavity

c)

Produces insulin

d)

Lung tissue is porous and spongy

45.

What is the thin, moist slippery membrane that covers the lungs called?

a)

Pleura

b)

Pericardium

c)

Peritoneum

d)

Meninges

46.

Which of the following best describes the pleura?

a)

A) A single-layered membrane covering the heart

b)

B) A double-walled sac with visceral pleura attached to the lung surface and parietal pleura attached to the chest wall

c)

C) A muscle involved in breathing

d)

D) A bone in the rib cage

47.

The pleural cavity is the space between the two layers of the pleura and is filled with pleural fluid to prevent friction as lungs expand during breathing.

a)

True

b)

False

48.

What structure of the respiratory system is responsible for voice production?

a)

Larynx

b)

Trachea

c)

Bronchi

d)

Alveoli

49.

Which body function is made possible by fibrous plates contained within the cartilage of the larynx?

(a)  

50.

The respiratory system ends in millions of tiny, thin walled sacs called: ________

a)

Alveoli

b)

Bronchioles

c)

Trachea

d)

Capillaries

51.

What covers the outer surface of the lungs and lines the inner surface of the rib cage?

a)

Pleura

b)

Pericardium

c)

Diaphragm

d)

Peritoneum

52.

The windpipe is referred to as the: ________

a)

Trachea

b)

Esophagus

c)

Bronchi

d)

Larynx

53.

The wall of the trachea are made more rigid by the presence of: ________

a)

Rings of Cartilage

b)

Muscle fibers

c)

Ligaments

d)

Blood vessels

54.

Each lung is divided into two or three parts called: ________

a)

Lobes

b)

Bronchi

c)

Alveoli

d)

Villi

55.

When the trachea divides to enter both lungs, the tubes that are formed are called: ________

a)

Bronchi

b)

Alveoli

c)

Bronchioles

d)

Tracheoles

56.

The partition that separated the nose into right and left cavities is the: ________

a)

Septum

b)

Nasal concha

c)

Turbinates

d)

Sinus

57.

The medical name for the throat is the: ________

a)

Pharynx

b)

Larynx

c)

Trachea

d)

Esophagus

58.

What is the main function of the respiratory system in relation to the circulatory system?

a)

Exchanging gases between air and blood.

b)

Digesting food for energy.

c)

Producing hormones for growth.

d)

Filtering waste from the blood.

59.

Which process involves taking in oxygen from air and supplying it to blood for cellular respiration?

a)

Expiration

b)

Inspiration

c)

Circulation

d)

Digestion

60.

Expiration is responsible for the removal and disposal of (a)   from blood (waste product from cellular respiration).

61.

The respiratory system helps regulate blood pH.

a)

True

b)

False

62.

Name two homeostatic roles of the respiratory system.

a)

Regulates blood pH and regulates blood oxygen and carbon dioxide levels.

b)

Produces digestive enzymes and stores nutrients.

c)

Controls muscle contractions and generates nerve impulses.

d)

Regulates body temperature and produces hormones.

63.

What is internal respiration?

a)

Exchange of CO2 and O2 between the body’s tissue cells and bloodstream

b)

Cells use O2 and nutrients to produce energy, water, and carbon dioxide

c)

Breathing in oxygen from the environment

d)

Transport of nutrients in the blood

64.

Fill in the blank: Cellular respiration is the process by which cells use ______ and nutrients to produce energy, water, and carbon dioxide.

a)

O2

b)

CO2

c)

H2O

d)

N2

65.

The concentration of CO2 waste is higher in the tissue cells than in the bloodstream, so it diffuses into the blood to be taken back to the lungs.

a)

True

b)

False

66.

Which direction does oxygen (O2) diffuse?

a)

From tissue cells to capillaries

b)

From capillaries to tissue cells

c)

From lungs to tissue cells directly

d)

From blood to lungs

67.

External respiration is the exchange of ______ and ______ between the lungs and bloodstream.

a)

O2, CO2

b)

CO2, H2O

c)

O2, N2

d)

CO2, O2

68.

Which of the following best describes what happens during external respiration?

a)

O2 enters the alveoli and diffuses into the capillary blood, while CO2 diffuses from the blood into the alveoli to be breathed out.

b)

CO2 enters the alveoli and diffuses into the capillary blood, while O2 diffuses from the blood into the alveoli to be breathed out.

c)

O2 and CO2 both move from the blood into the alveoli.

d)

O2 and CO2 both move from the alveoli into the blood.

69.

During external respiration, O2 diffuses from the alveoli into the capillary blood because the blood has less O2 than the alveoli.

a)

True

b)

False

70.

What is the partial pressure of O2 (PO2) in the alveoli of the lungs?

a)

160 mm Hg

b)

104 mm Hg

c)

40 mm Hg

d)

45 mm Hg

71.

What is the partial pressure of CO2 (PCO2) in the blood entering the alveolar capillaries?

a)

40 mm Hg

b)

45 mm Hg

c)

27 mm Hg

d)

160 mm Hg

72.

What is another term for respiration?

a)

Digestion

b)

Ventilation

c)

Circulation

d)

Excretion

73.

Respiration (breathing) is controlled by the respiratory center in the _________

a)

medulla oblongata

b)

cerebellum

c)

hypothalamus

d)

cerebrum

74.

Increased CO₂ or decreased O₂ causes an increase in respiration.

a)

True

b)

False

75.

Is respiration usually involuntary or voluntary?

4 lines
76.

During inhalation, what happens to the diaphragm and the belly?

a)

Diaphragm rises, belly contracts

b)

Diaphragm descends, belly expands

c)

Diaphragm descends, belly contracts

d)

Diaphragm rises, belly expands

77.

What happens to the diaphragm during inspiration (inhalation)?

a)

It relaxes and moves upward

b)

It contracts and moves downward

c)

It stays in the same position

d)

It contracts and moves upward

78.

During inspiration, the intercostal muscles lift the ribs ______, and the sternum ______.

a)

outward, rises

b)

inward, falls

c)

downward, rises

d)

outward, falls

79.

During inhalation, the volume of the lungs increases, creating a vacuum that causes air to rush into the alveoli.

a)

True

b)

False

80.

What happens to the belly during inhalation?

a)

It contracts

b)

It expands

c)

It stays the same

d)

It moves upward

81.

What is expiration (exhalation)?

a)

Breathing in

b)

Breathing out

c)

Holding breath

d)

Sneezing

82.

During exhalation, what happens to the intercostal muscles and diaphragm?

a)

They contract

b)

They relax

c)

They expand

d)

They stiffen

83.

Exhalation is usually a ______ process.

a)

passive

b)

active

c)

forced

d)

voluntary

84.

What happens to the diaphragm during inhalation?

a)

It ascends

b)

It descends

c)

It contracts

d)

It relaxes

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