Respiratory System Quiz

Abigail, Aiden, and Liam are learning about the human body in their biology class. According to their teacher, what is the primary role of the respiratory system?

• To help the body digest food and absorb nutrients

• To bring oxygen into the body and remove carbon dioxide

• To filter harmful particles from the air

• To circulate blood throughout the body

During a biology class, Jackson, Liam, and Samuel were asked to identify the parts of the respiratory system. Samuel incorrectly included one of the following in his list. Which one is NOT a part of the respiratory system?

• Nose

• Lungs

• Trachea

• Stomach

Evelyn, Abigail, and Nora are on a field trip to a science museum. They come across an exhibit about the human respiratory system. The guide asks, 'Where do oxygen molecules enter the bloodstream in our body?'

• Through the nose

• At the alveoli in the lungs

• Through the trachea

• Through the mouth

During a biology class experiment, Kai, Abigail, and Noah were studying the respiratory system. They were particularly interested in what happens to carbon dioxide molecules in the respiratory system. Can you help them understand?

• They enter the bloodstream

• They are filtered out by the nose

• They are released when you breathe out

• They are converted into oxygen

Anika, Henry, and Maya are studying the human body in their biology class. They are particularly interested in how the respiratory system connects to the circulatory system. Can you help them understand this?

• Through the alveoli

• Through the nose

• Through the blood vessels

• Through the trachea

Abigail, Lily, and James are studying human biology. They are curious about the respiratory system and James asks, 'How many times do we breathe in and out per minute when we are just sitting and reading a book?'

• 20 to 25 times

• 12 to 20 times

• 10 to 15 times

• 5 to 10 times

During a science experiment, Evelyn, Samuel, and Nora were studying the human respiratory system. They noticed that when Samuel was exercising, his breathing rate increased. They wondered what signals the brain to breathe faster when Samuel's carbon dioxide levels were high. What could be the reason?

• Nose hairs and mucus

• Epiglottis

• Nerve cells in the blood vessels

• Cilia in the respiratory system

During a school race, Grace, Jackson, and Emma are running. What happens to their breathing rate as they exercise?

• It increases

• It becomes irregular

• It stays the same

• It slows down

Emma, David, and Jackson are discussing the purpose of wearing masks during a dust storm. David says it's to filter the air. What does he mean by 'filtering' in this context?

• To trap harmful dust particles and let oxygen in

• To prevent choking on the dust

• To keep oxygen molecules out

• To remove carbon dioxide from the air

Ethan, Kai, and Nora are studying the human respiratory system for their biology project. They are particularly interested in understanding the structures that act as filters. Can you help them identify these structures?

• Cilia

• Epiglottis

• Trachea

• Alveoli