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What is the primary function of the respiratory system?

• To circulate blood throughout the body.

• To facilitate gas exchange (oxygen and carbon dioxide) between the body and the environment.

• To regulate body temperature through sweating.

• To digest food and absorb nutrients.

Which organ is primarily responsible for gas exchange in humans?

• Kidneys

• Liver

• Lungs

• Heart

What is the process of inhaling air called?

• Inhalation

• Ventilation

• Exhalation

• Respiration

What gas do we primarily inhale during respiration?

• Hydrogen

• Oxygen

• Nitrogen

• Carbon Dioxide

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

• The diaphragm helps in digestion by moving food through the stomach.

• The diaphragm regulates body temperature during exercise.

• The diaphragm is responsible for blood circulation in the body.

• The diaphragm plays a crucial role in breathing by contracting to allow air intake and relaxing to expel air.

Name one organ that is part of the human respiratory system.

• kidneys

• heart

• liver

• lungs

What happens to the air pressure in the lungs during inhalation?

• The air pressure in the lungs increases during inhalation.

• The air pressure in the lungs remains constant during inhalation.

• The air pressure in the lungs fluctuates randomly during inhalation.

• The air pressure in the lungs decreases during inhalation.

What is the term for the exchange of oxygen and carbon dioxide in the lungs?

• Gas exchange

• Carbon dioxide absorption

• Lung ventilation

• Oxygen diffusion

How does oxygen enter the bloodstream from the alveoli?

• Oxygen enters the bloodstream from the alveoli through diffusion.

• Oxygen is released from red blood cells into the alveoli.

• Oxygen is absorbed through active transport.

• Oxygen enters the bloodstream via the lymphatic system.

What is the main purpose of the nasal cavity in the respiratory system?

• To facilitate speech production.

• To warm, moisten, and filter inhaled air.

• To enhance the sense of smell.

• To absorb oxygen directly into the bloodstream.