Respiration Basics

Why is oxygen important in respiration?

• Oxygen is responsible for breaking down glucose into smaller molecules.

• Oxygen is needed to accept electrons at the end of the electron transport chain in order to produce ATP.

• Oxygen is used to store excess energy in the form of glucose.

• Oxygen is only needed for plants, not for animals, in respiration.

Which organ is responsible for the exchange of gases in the respiratory system?

• Liver

• Stomach

• Lungs

• Heart

What is the function of the diaphragm in respiration?

• The diaphragm helps in the process of inhalation and exhalation by changing the volume of the thoracic cavity.

• The diaphragm helps in digestion by secreting enzymes

• The diaphragm is responsible for maintaining body temperature

• The diaphragm regulates blood flow in the body

Name the tiny air sacs where gas exchange occurs in the lungs.

• Bronchioles

• Alveoli

• Trachea

• Pleura

What is the role of the trachea in the respiratory system?

• The trachea is responsible for filtering blood in the respiratory system.

• The trachea produces hormones for the respiratory system.

• The trachea connects the stomach to the lungs in the respiratory system.

• The trachea provides a passage for air to travel between the larynx and the lungs.

How does oxygen enter the bloodstream during respiration?

• Diffusion in the lungs

• Absorption through the skin

• Direct injection into the bloodstream

• Active transport in the lungs

What is the main function of the bronchial tubes?

• Regulate body temperature

• Transport nutrients

• Help with digestion

• Carry air to and from the lungs

Which organ in the respiratory system helps in filtering out dust and other particles?

• Alveoli

• Trachea

• Cilia

• Bronchi

Explain the process of inhalation and exhalation in respiration.

• Inhalation involves the diaphragm contracting and moving upward.

• Inhalation involves the diaphragm contracting and moving downward, while exhalation involves the diaphragm relaxing and moving upward.

• Inhalation involves the diaphragm relaxing and moving upward.

• Exhalation involves the diaphragm contracting and moving downward.

What happens to the carbon dioxide produced during respiration?

• Converted into water

• Stored in the bones

• Exhaled through the lungs

• Released through the skin