Some early experiments showed that a mouse could live in a container in which a plant had first been grown. What did the plant produce that the mouse needed?
__________ is the movement of the chest that brings air into the lungs and removes waste gases.
What is the function of cilia that line the nasal cavity?
|A)||trap dust from the air|
|B)||moisten the air taken in|
|C)||sweep away mucus and trapped materials|
|D)||produce sticky mucus|
The __________ is a tubelike passageway used by food, liquid, and air.
When you swallow, the epiglottis prevents __________.
|A)||air from entering your lungs|
|B)||food or liquid from entering your airway|
|C)||dust and bacteria from entering your airway|
|D)||carbon dioxide from entering your lungs|
Which one of the following is the correct pathway of air after it enters the nasal passages?
|A)||larynx, trachea, pharynx, bronchi, lungs|
|B)||lungs, bronchi, trachea, larynx, pharynx|
|C)||pharynx, larynx, trachea, bronchi, lungs|
|D)||larynx, pharynx, bronchi, trachea, lungs|
The exchange of oxygen and carbon dioxide in the lungs takes place between the __________.
|A)||pharynx and lungs|
|B)||nostrils and lungs|
|C)||bronchi and bronchiles|
|D)||alveoli and capillaries|
Your brain can control your breathing rate depending on the amount of __________ present in your blood.
What muscle contracts and relaxes when you inhale and exhale?
Which of the following is a method used to save the life of a choking victim?
Which one of the following is a disease of the respiratory system in which alveoli in the lungs enlarge?
Inhaling the tar in __________ is the greatest contributing factor to lung cancer.
Which one of the following is a lung disorder that occurs when the bronchial tubes contract quickly?