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Biology 20 - Respiratory System Exam Questions and Answers
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Biology 20 - Respiratory System Exam Questions and Answers
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Biology 20 - Respiratory System ExamQuestions and Answers
What is the main function of the respiratory system? - Answers -Ensure that oxygen is
brought to each cell in the body and that carbon dioxide can leave each cell.
What are the 2 main requirements for respiration? - Answers -Surface area and must
take place in a moist environment.
Breathing involves two basic process which are ____________ and _______________.
- Answers -Inspiration and expiration.
What is inspiration? - Answers -Breathing in or inhaling.
What is expiration? - Answers -Breathing out or exhaling.
What is external respiration? - Answers -The exchange of oxygen and carbon dioxide
between the air and the blood.
What is internal respiration? - Answers -The exchange of oxygen and carbon dioxide
between the body's tissue cells and the blood.
What are the lungs protected by? - Answers -The bone and muscular structure of the
thoracic chest cavity.
What is the order of the respiratory tract? - Answers -Nasal passage, pharynx,
epiglottis, glottis, larynx, trachea, bronchus, lung.
What is the function of the nasal passage? - Answers -The nasal passages serve to
warm, moisten, and clean incoming air.
What is the nasal passage lined with? What is their function? - Answers -Ciliated cells.
Moves the foreign particles back up into the nose and throat where they can be expelled
by sneezing or coughing.
What are turbinate bones? What is their function? - Answers -Very thin bones that
project into the nasal cavity. They serve as increasing the surface area of the nasal
passages. They are covered in cilia.
What is the pharynx? What is the their function? - Answers -Commonly known as the
throat. It is a passageway for air into the respiratory system.
, What is the epiglottis? What is their function? - Answers -A flap of cartilage that lies
behind the tongue and in front of the larynx. The epiglottis closes over the opening to
the trachea, the glottis, when a person swallows.
What is the larynx? What is their function? - Answers -The larynx is made from cartilage
and contains the vocal cords.
What is the trachea? What is their function? - Answers -The trachea is known as the
windpipe. The trachea is strengthened by semicircular, cartilaginous arches that prevent
it from collapsing.
What are bronchi? - Answers -The trachea branches into two smaller passageways.
What are bronchioles? - Answers -Each bronchus subdivides many times to create a
branching network of smaller and finer tubes.
Between bronchi and bronchioles, which one has C-shaped cartilage rings for support
and which one doesn't? - Answers -Bronchi contain the rings. Bronchioles do not.
Both bronchi and bronchioles are lined with what? - Answers -Cilia and mucus
protecting cells.
Each lung is divided into distinct regions called ___________? - Answers -Lobes.
How many lobes are on the right lung? How many lobes are on the left lung? - Answers
-Right = 3
Left = 2
What is the pleural membrane? What is it's function? - Answers -Each lung is
surrounded by a thin, double-layer membrane called the pleural membrane. The other
layer of this membrane attaches to the inside of the chest wall. The inner layer of the
membrane attaches to the lung. The membrane serves as a means for connecting the
lungs to the thoracic cavity, enabling them to expand and contract with the movement of
the chest.
Each bronchiole ends in a cluster of tiny sacs called ______________? - Answers -
Alveoli.
What is the function of the alveoli? - Answers -Exchange of gas takes place during
external respiration.
What is each alveolus enclosed by? What is its function? - Answers -A membrane
called the alveolar wall. It is one cell thick and is surrounded by a network of capillaries.
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