Question 1

What gas do humans need to live?

Accepted Answer

Oxygen

Answer

Nitrous oxide

Answer

Carbon monoxide

Answer

Carbon Dioxide

Question 2

What is the waste gas that the body needs to remove through the respiratory system?

Accepted Answer

Carbon dioxide

Answer

Nitrogen

Answer

Oxygen

Answer

Methane

Question 3

What covers the windpipe to prevent food or liquid from entering the lungs?

Accepted Answer

Epiglottis

Answer

Bronchus

Answer

Diaphragm

Answer

Larynx

Question 4

What is the tube that connects the upper respiratory system to the lungs called?

Accepted Answer

Trachea

Answer

Bronchi

Answer

Alveoli

Answer

Esophagus

Question 5

How is breathing through your nose beneficial?

Accepted Answer

Air is cleaner, moistened, and warmed

Answer

Air is moistened, purified, and cooled

Answer

Air is colder, drier, and cleaner

Question 6

What is the function of the respiratory system?

Accepted Answer

To bring oxygen into the body and remove carbon dioxide

Answer

To pump blood around the body

Answer

To digest food and absorb nutrients

Answer

To regulate body temperature

Question 7

What is the role of the epiglottis during eating and drinking?

Accepted Answer

To cover the trachea and prevent choking

Answer

To filter particles from the air

Answer

To regulate airflow in the lungs

Answer

To produce saliva for digestion

Question 8

What is the first structure of the upper respiratory system that air passes through?

Accepted Answer

nasal passage

Answer

bronchi

Answer

larynx

Answer

trachea

Question 9

What is another name for the windpipe?

Accepted Answer

trachea

Answer

bronchi

Answer

larynx

Answer

nasal conchae

Question 10

Which muscle plays a key role in the expansion of the lungs?

Accepted Answer

diaphragm

Answer

trapezius

Answer

quadriceps

Answer

biceps

Question 11

What do the left and right bronchi split into?

Accepted Answer

bronchioles

Answer

esophagus

Answer

sinuses

Answer

alveolar ducts

Question 12

What are the passageways formed when the trachea splits called?

Accepted Answer

bronchi

Answer

pharynx

Answer

esophagus

Answer

alveoli

Question 13

Which bone protects the lungs and provides support for the thoracic cavity?

Accepted Answer

ribs

Answer

skull

Answer

vertebrae

Answer

femur

Question 14

What structures trap foreign microorganisms and debris in the air?

Accepted Answer

cilia and mucus

Answer

alveoli

Answer

bronchi

Answer

trachea

Question 15

What does oxygen do once it enters our bloodstream?

Accepted Answer

travels to every part of the body

Answer

gets stored in the stomach

Answer

goes to the brain only

Answer

stays in the lungs

Question 16

What happens when we exhale?

Accepted Answer

carbon dioxide moves out of the lungs

Answer

nitrogen enters the body

Answer

oxygen moves into the lungs

Answer

water vapor is released

Question 17

What covers the inside surface of the alveoli?

Accepted Answer

tiny blood vessels

Answer

fat cells

Answer

muscles

Answer

nerves

Question 18

What are the small sacs at the end of the bronchial tubes called?

Accepted Answer

alveoli

Answer

lobes

Answer

ventricles

Answer

sinuses

Question 19

What is the main job of our lungs?

Accepted Answer

to take gases in and out of our body

Answer

to digest food

Answer

to control body temperature

Answer

to pump blood

Question 20

What is the size of each lung?

Accepted Answer

about the size of a football

Answer

the size of a basketball

Answer

the size of a tennis ball

Answer

the size of a golf ball

Question 21

What is the function of the pulmonary artery?

Accepted Answer

Carries blood to the lungs

Answer

Carries blood to the muscles

Answer

Carries blood to the brain

Answer

Carries blood to the heart

Question 22

What is the purpose of the alveoli in the lungs?

Accepted Answer

Gas exchange

Answer

Filtering air

Answer

Production of mucus

Answer

Storage of oxygen

Question 23

How does inhalation and exhalation take place?

Accepted Answer

Contraction and relaxation of muscles

Answer

Digestion of food

Answer

Generation of heat

Answer

Circulation of blood

Question 24

What is the point of gas exchange in the alveoli?

Accepted Answer

Oxygen enters blood, carbon dioxide exits blood

Answer

Carbon dioxide enters blood, nitrogen exits blood

Answer

Carbon dioxide enters blood, oxygen exits blood

Answer

Oxygen enters blood, water exits blood

Question 25

What happens to the diaphragm and intercostal muscles during exhalation?

Accepted Answer

Relax

Answer

Stretch

Answer

Contract

Answer

Twist

Question 26

What is the main job of capillaries?

Accepted Answer

dropping off oxygen and picking up wastes

Answer

carrying blood back to the heart

Answer

filtering blood

Answer

carrying blood away from the heart

Question 27

Which blood vessel has very tough, flexible, and thick walls?

Accepted Answer

arteries

Answer

capillaries

Answer

lymphatics

Answer

veins

Question 28

What is the largest artery in the body called?

Accepted Answer

aorta

Answer

coronary artery

Answer

carotid artery

Answer

femoral artery

Question 29

Which blood vessel has walls that are only one cell thick?

Accepted Answer

capillaries

Answer

lymphatics

Answer

arteries

Answer

veins

Question 30

Which blood vessel carries blood back to the heart?

Accepted Answer

veins

Answer

lymphatics

Answer

arteries

Answer

capillaries

Question 31

Which blood vessel carries blood away from the heart?

Accepted Answer

arteries

Answer

veins

Answer

lymphatics

Answer

capillaries

Question 32

What are the three main parts of the circulatory system?

Accepted Answer

heart, blood, blood vessels

Answer

skin, eyes, ears

Answer

brain, muscles, bones

Answer

lungs, liver, stomach

Question 33

Which blood vessel has the least pressure on the blood it carries?

Accepted Answer

veins

Answer

lymphatics

Answer

capillaries

Answer

arteries

Question 34

Which circuit of blood flow carries oxygen-rich blood from the left side of the heart to the body tissues?

Accepted Answer

systemic circulation

Answer

arterial circulation

Answer

pulmonary circulation

Answer

venous circulation

Question 35

What is the color generally used for depicting oxygenated blood?

Accepted Answer

red

Answer

green

Answer

purple

Answer

blue

Question 36

What is the main function of capillaries in blood circulation?

Accepted Answer

permit the exchange of gases and nutrients

Answer

return deoxygenated blood to the heart

Answer

conduct blood away from the heart

Answer

carry oxygen-rich blood to body tissues

Question 37

What does the pulmonary circulation do?

Accepted Answer

conveys oxygen-depleted blood from the right side of the heart to the lungs for oxygenation

Answer

carries oxygen-rich blood from the left side of the heart to body tissues

Answer

connects arteries to veins via capillaries

Answer

transports blood between the heart and the liver

Question 38

What is the aspect of blood that determines its color as either red or blue?

Accepted Answer

oxygenation level

Answer

temperature

Answer

volume

Answer

flow rate

Question 39

Where does capillary blood appear more oxygenated within the capillary bed?

Accepted Answer

arterial side

Answer

middle section

Answer

outside the capillary

Answer

venous side

Question 40

What does the left side of the heart pump?

Accepted Answer

Oxygen-rich blood

Answer

Deoxygenated blood

Answer

Carbon dioxide

Answer

Waste products

Question 41

What does the right side of the heart pump?

Accepted Answer

Oxygen-poor blood

Answer

Carbon dioxide

Answer

Oxygen-rich blood

Answer

Waste products

Question 42

What is the main job of the heart?

Accepted Answer

Pumping blood throughout the body

Answer

Producing oxygen

Answer

Filtering waste

Answer

Digesting food

Question 43

What type of muscle is the heart tissue?

Accepted Answer

Involuntary muscle

Answer

Skeletal muscle

Answer

Voluntary muscle

Answer

Smooth muscle

Question 44

How many chambers does each side of the heart have?

Accepted Answer

Two

Answer

One

Answer

Three

Answer

Four

Question 45

What type of muscle tissue is the heart made of?

Accepted Answer

Cardiac muscle

Answer

Smooth muscle

Answer

Voluntary muscle

Answer

Skeletal muscle

Question 46

How many chambers does the heart have?

Accepted Answer

four

Answer

eight

Answer

six

Answer

two

Question 47

Which blood vessels receive richly oxygenated blood in the heart?

Accepted Answer

pulmonary veins

Answer

coronary sinus

Answer

pulmonary trunk

Answer

vena cavae

Question 48

Where does the right ventricle pump oxygen-deficient blood to?

Accepted Answer

lungs

Answer

brain

Answer

heart

Answer

liver

Question 49

What receives poorly oxygenated blood from the superior and inferior vena cavae?

Accepted Answer

right atrium

Answer

right ventricle

Answer

left atrium

Answer

left ventricle

Question 50

Which side of the heart includes the right atrium and right ventricle?

Accepted Answer

pulmonary heart

Answer

left atrium

Answer

left ventricle

Answer

systemic heart

Question 51

What is the main job of red blood cells in our body?

Accepted Answer

Carry oxygen and carbon dioxide

Answer

Fight diseases and germs

Answer

Hold the other parts of blood

Answer

Thicken and harden the blood in air

Question 52

Which part of the blood is responsible for fighting diseases and germs?

Accepted Answer

White blood cells

Answer

Platelets

Answer

Red blood cells

Answer

Plasma

Question 53

What is the liquid that makes up most of our blood?

Accepted Answer

Plasma

Answer

White blood cells

Answer

Red blood cells

Answer

Platelets

Question 54

Which component of blood is responsible for clotting to stop bleeding and help wounds heal?

Accepted Answer

Platelets

Answer

Plasma

Answer

White blood cells

Answer

Red blood cells

Question 55

What is the function of thrombocytes in the blood?

Accepted Answer

Limiting hemorrhage by enhancing clot formation

Answer

Removing aged cells from circulation

Answer

Producing antibodies for immune response

Answer

Carrying oxygen in the body

Question 56

Where are erythrocytes formed in the body?

Accepted Answer

Bone marrow

Answer

Lungs

Answer

Liver

Answer

Spleen

Question 57

What is the primary function of leukocytes in the body?

Accepted Answer

Protective function

Answer

Enhancing clot formation

Answer

Carrying oxygen in the body

Answer

Producing hormones

Question 58

What is the main protein found in erythrocytes that carries oxygen in the body?

Accepted Answer

Hemoglobin

Answer

Collagen

Answer

Insulin

Answer

Cholesterol

Question 59

What is the main function of erythrocytes in the body?

Accepted Answer

Carrying oxygen to tissues

Answer

Regulating body temperature

Answer

Producing antibodies

Answer

Digesting food

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