Question 1:

Which of the following structures is responsible for filtering and humidifying the air we breathe?

Explanation: The nasal cavity is responsible for filtering and humidifying the air we breathe. It contains specialized structures called nasal conchae and mucus-producing cells that help trap and remove particles from the air.

Question 2:

Which of the following structures is commonly known as the windpipe?

Explanation: The trachea, commonly known as the windpipe, is a tube-like structure that connects the larynx to the bronchi. It allows air to pass in and out of the lungs.

Question 3:

Which of the following structures is responsible for gas exchange in the lungs?

Explanation: The alveoli, small sacs in the lungs, are responsible for gas exchange. Oxygen from inhaled air diffuses into the bloodstream, while carbon dioxide, a waste product, diffuses out of the bloodstream into the alveoli to be exhaled.

Question 4:

Which of the following structures helps to prevent food or liquid from entering the trachea?

Explanation: The epiglottis is a flap-like structure located at the base of the tongue that helps prevent food or liquid from entering the trachea. It covers the opening of the larynx during swallowing to ensure that food and liquid enter the esophagus instead of the trachea.

Question 5:

Which of the following structures branch out into smaller tubes called bronchioles?

Explanation: The bronchi branch out into smaller tubes called bronchioles. Bronchioles further divide into even smaller respiratory bronchioles, eventually leading to the alveoli where gas exchange takes place.