Respiratory System Quiz

Which of the following is a function of the respiratory system?

• Transports nutrients to cells

• Transfers oxygen into blood

• Produces red blood cells

• Regulates body temperature

Answer explanation

The function of the respiratory system is to transfer oxygen into the blood, making the correct choice 'Transfers oxygen into blood'.

What does the respiratory system remove from the blood?

• Oxygen

• Nitrogen

• Carbon dioxide

• Glucose

Answer explanation

The respiratory system removes carbon dioxide from the blood, not oxygen, nitrogen, or glucose.

Which of the following is NOT a section of the respiratory system?

• The Conducting System

• The Lungs

• The Diaphragm

• The Heart

Answer explanation

The Heart is NOT a section of the respiratory system.

Which section of the respiratory system is responsible for the movement of air in and out of the lungs?

• The Conducting System

• The Lungs

• The Diaphragm

• The Heart

Answer explanation

The Conducting System is responsible for the movement of air in and out of the lungs.

What is the function of the "Diaphragm" as shown in the diagram?

• To filter air entering the nasal cavity

• To produce sound

• To facilitate breathing by contracting and relaxing

• To transport oxygen to the bloodstream

Answer explanation

To facilitate breathing by contracting and relaxing

Which part of the conducting system warms and filters air?

• Pharynx

• Larynx

• Nasal Cavity

• Trachea

Answer explanation

The Nasal Cavity warms and filters air before it enters the conducting system.

What is the major organ of the respiratory system?

• Heart

• Liver

• Lungs

• Kidneys

Answer explanation

The major organ of the respiratory system is the Lungs.

Where are the lungs located?

• In the abdominal cavity

• In the chest cavity behind the ribs

• In the pelvic cavity

• In the cranial cavity

Answer explanation

The lungs are located in the chest cavity behind the ribs.

What type of muscle is the diaphragm?

• Voluntary (skeletal) muscle

• Involuntary (smooth) muscle

• Cardiac muscle

• Striated muscle

Answer explanation

The diaphragm is an involuntary (smooth) muscle responsible for breathing, making it the correct choice.

What happens to the chest cavity when the diaphragm moves up and down?

• The chest cavity remains the same size

• The chest cavity increases in size only

• The chest cavity decreases in size only

• The chest cavity increases and decreases in size

Answer explanation

When the diaphragm moves up, the chest cavity increases in size, allowing for inhalation. When the diaphragm moves down, the chest cavity decreases in size, facilitating exhalation.