Understanding the Respiratory System

How many times does an average person breathe in a day?

• 40,000 times

• 30,000 times

• 20,000 times

• 10,000 times

Why is the left lung smaller than the right lung?

• To make room for the liver

• To make room for the heart

• To make room for the stomach

• To make room for the spleen

What is the term used to describe the maximum amount of air the lungs can hold?

• Respiratory volume

• Breathing rate

• Lung capacity

• Oxygen intake

What happens to your breathing when you exercise?

• It stops temporarily

• It becomes faster and deeper

• It becomes shallower

• It slows down

Which muscle is primarily responsible for helping you breathe?

• The heart

• The diaphragm

• The liver

• The stomach

What happens to the diaphragm when you exhale?

• It contracts

• It stiffens

• It expands

• It relaxes

What are the tiny air sacs in the lungs called?

• Bronchi

• Pleura

• Trachea

• Alveoli

What is the primary function of oxygen in the body?

• To produce hormones

• To digest food

• To provide energy

• To build muscles

What waste product is expelled from the body when you exhale?

• Oxygen

• Nitrogen

• Carbon dioxide

• Hydrogen

How long can the brain survive without oxygen before cells begin to die?

• 15 minutes

• 20 minutes

• 5 minutes

• 10 minutes