YMCA level 2 fitness instructer- Respiratory system

Which of the following correctly describes the process of diffusion in the lungs ?

• Diffusion is the movement of molecules from an area of greater concentration into an area of lesser concentration

• Diffusion is the movement of molecules from an area of lesser concentration into an area of higher concentration

• Diffusion involves the movement of oxygen through the capillaries to be expelled by the lungs

• Diffusion involves the movement of carbon dioxide into the capillaries to be used by the body.

Answer explanation

Which of the following describes the trachea?

• It is a hollow tube made of compact bone

• It is a hollow tube that connects the larynx to the bronchi

• It is a hollow tube that connects the larynx to the bronchioles

• It is a tube made of cancellous bone

Which of the following describes gaseous exchange?

• Carbon dioxide moves from the pulmonary capillaries into the alveoli to be expelled .

• Carbon dioxide moves from the pulmonary capillaries into the alveoli to be circulated around the body.

• Carbon dioxide moves from the alveoli to the pulmonary capillaries into the to be circulated around the body.

• Carbon dioxide moves from the alveoli to the pulmonary capillaries to be expelled .

Which of the following describes the bronchus?

• They are extensions of the trachea that carry air into the lungs

• They are the small air sacs where gaseous exchange takes place

• They are extensions of the bronchioles that carry air into the lungs

• They are the small air sacs that carry air into the lungs

Which of the following gasses diffuse into the alveoli to be expelled by the lungs

• Carbon Monoxide

• Carbon dioxide

• Oxygen

• Hydrogen

What is the correct order of the respiratory system

• •Trachea (windpipe)

  •Bronchus (bronchi)

  •Bronchioles

  •Capillaries

  Alveoli (singular alveolus)

  •

• Trachea (windpipe)

  Bronchus (bronchi)

  Bronchioles

  Alveoli (singular alveolus)

  Capillaries

• Trachea (windpipe)

  Bronchioles

  Bronchus (bronchi)

  (singular alveolus)

  Capillaries

• Bronchus

  Trachea

  Bronchioles

  Alveoli

  Capillaries