7th semester 2 unit 4 spring 2022

Explain what happens as the heart grows bigger.

How many breaths per minute would you expect to have while exercising vigorously?

• 15 breaths per minute

• 1 breath per minute

• 5 breaths per minute

• 30 breaths per minute

Which features of alveoli enable them to exchange gases efficiently? (Select all that apply.)

• large surface area

• thin walls

• small numbers of them in each lung

• surrounded by blood vessels

What is the name for the space inside the ribs that the lungs fill?

• lungs

• chest

• cavity

• diaphragm

Which of these are part of the respiratory system? (Select all that apply.)

• heart

• larynx

• lungs

• sinuses

Which of these are components of blood? (Select all that apply.)

• bile

• oxygen gas

• platelets

• red blood cells

What is the function of the trachea? (Select all that apply.)

• warm and moisten air

• carry food from the mouth toward the stomach

• carry air from the nose down toward the lungs

• trap debris in mucous which is swept upward toward the nose by cilia

Which of these are functions of capillaries? (Select all the apply.)

• surround alveoli

• absorb oxygen and nutrients

• carry blood away from the heart

• deliver blood to all cells

What is the function of platelets?

Explain how oxygen and carbon dioxide move with breathing.