The Respiratory System: question bank

Q1

FoundationCore practice

Which organ is primarily responsible for gas exchange in the human respiratory system?

TracheaLungsDiaphragmBronchi

Q2

FoundationCore practice

What is the name of the tiny air sacs in the lungs where gas exchange occurs?

Your answer

Q3

FoundationCore practice

Which gas do we breathe in that is used by our cells for energy production?

Your answer

Q4

FoundationCore practice

What happens to the diaphragm during inhalation (breathing in)?

It relaxes and moves upwardIt contracts and moves downwardIt stays in the same positionIt contracts and moves upward

Q5

FoundationCore practice

Calculate the total surface area of the alveoli if one lung has approximately 300 million alveoli and each alveolus has a surface area of about 0.0000001 m² (0.1 mm²). Give your answer in square meters.

Your answer (m²)

Q6

FoundationCore practice

Which of the following is the correct pathway of air from the outside into the lungs?

Nose → Larynx → Pharynx → Trachea → Bronchi → LungsNose → Pharynx → Larynx → Trachea → Bronchi → LungsNose → Trachea → Pharynx → Larynx → Bronchi → LungsNose → Pharynx → Trachea → Larynx → Bronchi → Lungs

Q7

FoundationCore practice

What is the function of cilia in the respiratory system?

To produce mucus that traps particlesTo move mucus and trapped particles upward and out of the airwaysTo absorb oxygen into the bloodstreamTo produce sound when air passes over them

Q8

FoundationCore practice

If a person breathes 12 times per minute and each breath moves 500 mL of air into the lungs, how many liters of air enter the lungs in one hour?

Your answer (L)

Q9

FoundationCore practice

During exercise, a person's breathing rate increases from 12 breaths per minute to 20 breaths per minute. If each breath still moves 500 mL of air, how many extra liters of air enter the lungs each minute during exercise compared to rest?

Your answer (liters)

Q10

FoundationCore practice

The respiratory system works with which other body system to deliver oxygen to cells and remove carbon dioxide?

The digestive systemThe circulatory systemThe nervous systemThe skeletal system

Q11

FoundationCore practice

In the equation for respiration, glucose reacts with oxygen to produce carbon dioxide, water, and energy. If the chemical formula for glucose is C₆H₁₂O₆, how many carbon atoms are in one molecule of glucose?

Your answer

Q12

FoundationCore practice

Why is the inner surface of the lungs (where the alveoli are) covered with many tiny blood vessels called capillaries?

To protect the alveoli from damageTo increase the distance for gas exchangeTo provide a large surface area and short distance for gases to diffuseTo produce mucus that traps dust particles

Q13

FoundationCore practice

A person's vital capacity is the maximum amount of air they can exhale after taking the deepest possible breath. If someone inhales 4.5 liters of air during a deep breath, and 1.2 liters of air remains in their lungs at the end (the residual volume), what is their vital capacity in liters?

Your answer (liters)

Q14

FoundationCore practice

What is the name of the flap of tissue that closes over the trachea (windpipe) when you swallow, preventing food and liquid from entering your lungs?

Your answer

Q15

CoreCore practice

What is the main organ of the respiratory system where gas exchange actually occurs?

Your answer

All 52 questions