CLS Circulation and breathing Quiz

Which of the following structures is part of the thorax?

• Femur

• Ribs

• Pelvis

• Skull

What is the role of alveoli in the respiratory system?

• To filter blood

• To produce hormones

• To facilitate gas exchange

• To digest food

How do red blood cells adapt to transport oxygen?

• By having a nucleus

• By being flat and wide

• By containing haemoglobin

• By being rigid

What is the function of platelets in the blood?

• To transport oxygen

• To fight infections

• To aid in blood clotting

• To carry nutrients

How does the heart rate change during exercise?

• It increases

• It remains constant

• It decreases

• It stops

What is the primary function of the lungs in the human body?

• To pump blood

• To filter waste

• To facilitate breathing

• To digest food

Which part of the respiratory system is responsible for the exchange of gases?

• Trachea

• Alveoli

• Bronchi

• Diaphragm

What is the role of the diaphragm in the breathing process?

• It filters air

• It pumps blood

• It contracts and relaxes to aid breathing

• It digests food

What is the role of the external intercostal muscles during inhalation?

• They contract, causing the ribcage to expand.

• They relax, causing the ribcage to contract.

• They contract, causing the ribcage to contract.

• They relax, causing the ribcage to expand.

What happens to the diaphragm muscle during inhalation?

• It contracts and flattens.

• It relaxes and curves.

• It contracts and curves.

• It relaxes and flattens.