Exploring the Respiratory System

During a science class, Anika was asked about the primary function of the respiratory system. What should she answer?

• To circulate blood throughout the body

• To exchange gases between the body and the environment

• To break down food into nutrients

• To protect the body from pathogens

During a school play, Arjun was assigned the role of a character who had to sing and speak loudly. Which structure in the respiratory system is responsible for voice production?

• Trachea

• Larynx

• Bronchi

• Alveoli

Daniel is learning about the human body in his biology class. Explain how the diaphragm contributes to the process of inhalation.

• It contracts and moves upward, increasing the pressure in the chest cavity.

• It relaxes and moves downward, decreasing the pressure in the chest cavity.

• It contracts and moves downward, decreasing the pressure in the chest cavity.

• It relaxes and moves upward, increasing the pressure in the chest cavity.

Zoe is learning about the human body in her biology class. She needs to identify the pathway air follows as it travels through the respiratory system. Can you help her?

• Nose → Pharynx → Larynx → Trachea → Bronchi → Alveoli

• Nose → Larynx → Pharynx → Trachea → Bronchi → Alveoli

• Nose → Trachea → Pharynx → Larynx → Bronchi → Alveoli

• Nose → Bronchi → Trachea → Pharynx → Larynx → Alveoli

During a biology class, Samuel was asked to explain the function of alveoli in the human respiratory system. Which of the following best describes their role?

• They filter dust and pathogens from the air.

• They transport oxygen to the bloodstream.

• They are the site of gas exchange between air and blood.

• They produce mucus to trap particles.

Imagine Michael is learning about the respiratory system in his biology class. Describe the process of gas exchange in the alveoli that he would learn about.

• Oxygen diffuses from the alveoli into the blood, while carbon dioxide diffuses from the blood into the alveoli.

• Carbon dioxide diffuses from the alveoli into the blood, while oxygen diffuses from the blood into the alveoli.

• Both oxygen and carbon dioxide diffuse from the blood into the alveoli.

• Both oxygen and carbon dioxide diffuse from the alveoli into the blood.

Sophia is studying the human body and wonders, what is the function of the cilia in the respiratory system?

• To produce mucus

• To trap and remove particles from the air

• To facilitate gas exchange

• To support the structure of the trachea

During a science class, David learned about how the body maintains the pH balance of the blood. How does the respiratory system contribute to this process?

• By increasing the oxygen concentration in the blood

• By removing excess carbon dioxide from the blood

• By producing bicarbonate ions

• By filtering out acidic substances

During a biology class, Emma was curious about which part of the brain regulates the rate of breathing. Can you help her find the answer?

• Cerebrum

• Cerebellum

• Medulla oblongata

• Hypothalamus

During a biology class, Avery was asked to explain the role of the pleura in the respiratory system. What did Avery say?

• It filters air entering the lungs.

• It produces surfactant to reduce surface tension in the alveoli.

• It provides a slippery surface to reduce friction between the lungs and chest wall.

• It supports the trachea and bronchi.