wayground logo

Free Printable Worksheets

NEW

Font size

S
M
L
XL
Worksheets

Human Respiratory and Cardiovascular Systems

Total questions: 65

Worksheet time: 33mins

Name
Class
Date
1.

What is the main function of the respiratory system?

a)

Digest food

b)

Filter blood

c)

Exchange gases

d)

Regulate temperature

2.

Which structure is the site of gas exchange in the lungs?

a)

Bronchi

b)

Trachea

c)

Bronchioles

d)

Alveoli

3.

The upper respiratory tract includes all of the following EXCEPT:

a)

Trachea

b)

Nasal cavity

c)

Pharynx

d)

Larynx

4.

What prevents food from entering the trachea during swallowing?

a)

Uvula

b)

Epiglottis

c)

Vocal cords

d)

Larynx

5.

Which muscle is primarily responsible for inspiration?

a)

Alveoli

b)

Diaphragm

c)

Visceral pleura

d)

Trachea

6.

What is the function of surfactant in the alveoli?

a)

Transport CO₂

b)

Reduce surface tension

c)

Increase friction

d)

Absorb oxygen

7.

The pleural membrane consists of:

a)

One layer

b)

Two layers

c)

Three layers

d)

No layers

8.

The diaphragm contracts and moves ______ during inhalation.

a)

Upward

b)

Downward

c)

Laterally

d)

Inward

9.

Hemoglobin binds to oxygen in the:

a)

Capillaries

b)

Bronchioles

c)

Alveoli

d)

Pulmonary veins

10.

Which structure acts as a passageway for both air and food?

a)

Trachea

b)

Larynx

c)

Pharynx

d)

Nasal cavity

11.

What is the primary function of cilia in the respiratory tract?

a)

Move mucus and trapped particles

b)

Contract for ventilation

c)

Increase diffusion

d)

Absorb oxygen

12.

Which part of the pharynx is connected to the nasal cavity?

a)

Nasopharynx

b)

Oropharynx

c)

Laryngopharynx

d)

Epiglottis

13.

True or False: The right lung has three lobes.

a)

TRUE

b)

FALSE

14.

Which of the following is not part of the lower respiratory tract?

a)

Bronchi

b)

Pharynx

c)

Alveoli

d)

Trachea

15.

What is the term for air movement into and out of the lungs?

a)

Pulmonary ventilation

b)

Cellular respiration

c)

Internal respiration

d)

External respiration

16.

Tidal volume refers to:

a)

Air after deep exhalation

b)

Air during normal breathing

c)

Total air in lungs

d)

Air in conducting zone

17.

Which volume remains after maximal exhalation?

a)

Residual volume

b)

Tidal volume

c)

Inspiratory reserve

d)

Functional volume

18.

Which lung volume cannot be measured with spirometry?

a)

Residual volume

b)

Tidal volume

c)

Vital capacity

d)

IRV

19.

What happens to thoracic volume during inspiration?

a)

Collapses

b)

Decreases

c)

Stays the same

d)

Increases

20.

What is the normal tidal volume in an adult?

a)

150 mL

b)

500 mL

c)

1000 mL

d)

300 mL

21.

Intrapleural pressure is typically:

a)

Zero

b)

Positive

c)

Negative

d)

Equal to atmospheric pressure

22.

Inspiratory reserve volume refers to:

a)

Air exhaled during normal breathing

b)

Extra air inhaled after a normal breath

c)

Air that remains after exhalation

d)

Volume of dead space

23.

Which of the following assists in forced expiration?

a)

Diaphragm

b)

Abdominal muscles

c)

External intercostals

d)

Thoracic cavity

24.

Which process occurs during expiration?

a)

Lungs expand

b)

Diaphragm contracts

c)

Thoracic cavity volume decreases

d)

Intrapulmonary pressure drops

25.

Which pressure is always lower than atmospheric pressure during normal breathing?

a)

Partial pressure of oxygen

b)

Alveolar pressure

c)

Intrapulmonary pressure

d)

Intrapleural pressure

26.

Gas exchange in lungs occurs by:

a)

Filtration

b)

Osmosis

c)

Diffusion

d)

Active transport

27.

Partial pressure of oxygen in alveolar air is about:

a)

160 mmHg

b)

105 mmHg

c)

40 mmHg

d)

70 mmHg

28.

Hemoglobin can carry how many O₂ molecules?

a)

2

b)

4

c)

6

d)

8

29.

Most CO₂ is transported in blood as:

a)

Bicarbonate ions

b)

Dissolved gas

c)

Bound to plasma proteins

d)

In white blood cells

30.

Oxygen is primarily transported in blood by:

a)

Hemoglobin

b)

Plasma proteins

c)

Platelets

d)

Lymph

31.

Which enzyme helps convert CO₂ to bicarbonate?

a)

Carbonic anhydrase

b)

ATPase

c)

Protease

d)

Amylase

32.

True or False: CO₂ is more soluble in plasma than O₂.

a)

TRUE

b)

FALSE

33.

What causes oxygen release in tissues?

a)

High pO₂

b)

Low pO₂

c)

High pH

d)

Cold temperature

34.

True or False: Oxygen binds to the heme portion of hemoglobin.

a)

TRUE

b)

FALSE

35.

Which of the following best describes internal respiration?

a)

Air movement into lungs

b)

Gas exchange in alveoli

c)

Gas exchange between blood and tissues

d)

  • Transport of oxygen by hemoglobin

36.

At tissues, the partial pressure of oxygen is:

a)

Higher than in arteries

b)

Lower than in arteries

c)

Equal to alveolar pressure

d)

Higher than alveoli

37.

What is the approximate pCO₂ in venous blood?

a)

20 mmHg

b)

45 mmHg

c)

100 mmHg

d)

80 mmHg

38.

Carbonic acid dissociates into:

a)

CO₂ and water

b)

H⁺ and HCO₃⁻

c)

H⁺ and OH⁻

d)

HCO₃⁻ and CO

39.

What is the average weight of the human heart?

a)

150–200 grams

b)

200–250 grams

c)

250–350 grams

d)

400–500 grams

40.

Which layer of the heart is responsible for its pumping action?

a)

Epicardium

b)

Myocardium

c)

Endocardium

d)

Pericardium

41.

What is the function of the fibrous pericardium?

a)

Produces hormones

b)

Conducts impulses

c)

Prevents overstretching and anchors the heart

d)

Provides oxygen to the heart

42.

The serous membrane that tightly adheres to the heart surface is called:

a)

Parietal pericardium

b)

Endocardium

c)

Visceral pericardium

d)

Myocardium

43.

What separates the right and left atria?

a)

Interatrial septum

b)

Interventricular septum

c)

Tricuspid valve

d)

Aortic valve

44.

Which heart chamber has the thickest wall?

a)

Right atrium

b)

Left atrium

c)

Right atrium

d)

Left ventricle

45.

Which valve is also known as the mitral valve?

a)

Tricuspid

b)

Bicuspid

c)

Aortic

d)

Pulmonary

46.

The pulmonary valve allows blood to flow from the:

a)

Left atrium into left ventricle

b)

Left ventricle into aorta

c)

Right ventricle into pulmonary trunk

d)

Right atrium into right ventricle

47.

The coronary sinus drains into the:

a)

Left atrium

b)

Right atrium

c)

Pulmonary vein

d)

Aorta

48.

Which valves prevent backflow into the atria?

a)

AV valves

b)

SL valves

c)

Coronary valves

d)

Arterial valves

49.

What is the function of pulmonary circulation?

a)

Deliver oxygen to tissues

b)

Filter blood through kidneys

c)

Oxygenate blood in the lungs

d)

Collect nutrients from digestive tract

50.

Blood in the pulmonary arteries is:

a)

Fully oxygenated

b)

Deoxygenated

c)

Nutrient-rich

d)

From coronary circulation

51.

The systemic circulation excludes:

a)

Liver

b)

Muscles

c)

Brain

d)

Alveoli

52.

The vessel that carries oxygenated blood from lungs to the heart is the:

a)

Pulmonary artery

b)

Pulmonary vein

c)

Aorta

d)

Vena cava

53.

What initiates the heartbeat?

a)

AV node

b)

SA node

c)

Bundle of His

d)

Purkinje fibers

54.

Purkinje fibers first stimulate:

a)

Atria

b)

Papillary muscles

c)

Ventricular septum

d)

Valves

55.

The cardiac conduction pathway is:

a)

AV node → SA node → Bundle branches

b)

SA node → AV node → Bundle of His → Bundle branches → Purkinje fibers

c)

AV node → Bundle of His → SA node

d)

Purkinje fibers → SA node → AV node

56.

What causes the ventricles to contract?

a)

Aortic pressure

b)

AV valves

c)

Depolarization from Purkinje fibers

d)

Coronary arteries

57.

Which part increases heart rate during stress?

a)

Parasympathetic system

b)

Sympathetic system

c)

AV node

d)

Endocardium

58.

Acetylcholine (ACh) is released by:

a)

Parasympathetic system

b)

Adrenal cortex

c)

Sympathetic system

d)

Myocardium

59.

Norepinephrine acts to:

a)

Slow heart rate

b)

Block AV node

c)

Increase heart rate and contractility

d)

Relax coronary arteries

60.

Coronary arteries branch from the:

a)

Pulmonary artery

b)

Ascending aorta

c)

Left atrium

d)

Inferior vena cava

61.

Why does the myocardium need its own blood supply?

a)

It stores oxygen

b)

It is poorly vascularized

c)

Blood in heart chambers can’t diffuse effectively

d)

It shares blood with lungs

62.

Deoxygenated blood from myocardium enters:

a)

Pulmonary vein

b)

Coronary sinus

c)

Pulmonary artery

d)

Aorta

63.

Which heart chamber receives blood from the vena cava?

a)

Right atrium

b)

Right ventricle

c)

Left atrium

d)

Left ventricle

64.

The heart is located in the:

a)

Pleural cavity

b)

Mediastinum

c)

Abdominal cavity

d)

Pericardial sinus

65.

The main function of the valves in the heart is to:

a)

Regulate heart rate

b)

Stimulate contraction

c)

Prevent backflow of blood

d)

Deliver oxygen

Similar Resources on Wayground

Amanda's BIOL 1107 Final Review

67 questions

Amanda's BIOL 1107 Final Review

quiz

Worksheet

•

University

Nervous system review

62 questions

Nervous system review

quiz

Worksheet

•

11th Grade - University

Membrane structure and function

69 questions

Membrane structure and function

quiz

Worksheet

•

University

UAS Histologi I (Teori)

60 questions

UAS Histologi I (Teori)

quiz

Worksheet

•

University

Bio111, Ch12-15 Exam review (cell division & inheritance)

70 questions

Bio111, Ch12-15 Exam review (cell division & inheritance)

quiz

Worksheet

•

9th Grade - University

Unit 1 - Introduction to A&P Exam Review

65 questions

Unit 1 - Introduction to A&P Exam Review

quiz

Worksheet

•

8th Grade - University

HCR 240: Signs and symptoms practice for the final

69 questions

HCR 240: Signs and symptoms practice for the final

quiz

Worksheet

•

University

Ecology EOC Review

63 questions

Ecology EOC Review

quiz

Worksheet

•

10th Grade - University