Respiratory System: Question Preview (ID: 3820)

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Where in the body is air first warmed, moistened and filtered?
a) pharynx
b) bronchi
c) trachea
d) nose

The dome-shaped muscle that pulls air into the lungs is the
a) alveolus
b) diaphragm
c) bronchi
d) trachea

During gas exchange, what substance moves from the alveoli to the blood?
a) oxygen
b) air
c) water
d) carbon dioxide

Where in the respiratory system does gas exchange occur?
a) bonchi
b) trachea
c) diaphragm
d) alveoli

What excretory organ eliminates carbon dioxide from the body?
a) skin
b) lungs
c) anus
d) kidney

What is the name of the small flap of tissue that seals the trachea when you swallow?
a) larynx
b) diaphragm
c) alveoli
d) epiglottis

Which parts of the respiratory system divide into smaller and smaller tubes?
a) trachea
b) pharynx
c) bronchi
d) epiglottis

What happens to cause air to be exhaled from the lungs?
a) The rib muscles contract.
b) The lungs expand.
c) The diaphragm moves down.
d) The diaphragm moves up.

The role of the respiratory system is to bring what substance into the body for the cells?
a) oxygen
b) water
c) carbon dioxide
d) air

What 2 things are eliminated from the body when you exhale?
a) urea and oxygen
b) water and urea
c) carbon dioxide and urea
d) carbon dioxide and water

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