Biology 241 - Accelerated General Human Physiology » Summer 2021 » Lab Q14

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Question #1
Blood flow to a group of alveoli will decrease if:
A.   the level of oxygen in the alveoli increases.
B.   you breathe faster.
C.   the level of oxygen in the alveoli remains constant.
D.   the level of oxygen in the alveoli decreases.
Question #2
According to your results, changing body position from standing to lying:
A.   increased the tidal volume.
B.   did not change the tidal volume.
C.   decreased the tidal volume.
Question #3
When a person is lying down, blood pressure is uniform and the capillaries in the lung are open. What happens to the surface area for gas exchange when a person lies down?
A.   The surface area for gas exchange does not change when the person lies down.
B.   The surface area for gas exchange increases when the person lies down.
C.   The surface area for gas exchange decreases when the person lies down.
Question #4
Which of the following do you think would be increased by breathing through the plastic tube?
A.   The anatomical dead space
B.   The alveolar volume
C.   The vital capacity
D.   The surface area of alveoli
Question #5
If the tidal volume is 475 mL and the anatomical dead space is 150 mL, what is the alveolar ventilation?
A.   225 mL
B.   475 mL
C.   325 mL
D.   150 mL
Question #6
During exercise, the increase in the body’s oxygen requirements is met by:
A.   increasing tidal volume and breathing rate.
B.   increasing breathing rate.
C.   decreasing tidal volume and increasing breathing rate.
D.   increasing tidal volume.
E.   decreasing the anatomical dead space.
Question #7
The alveolar ventilation is:
A.   the maximum amount of air you can bring into your lungs after your have inhaled normally.
B.   the amount of air that moves in or out of the lungs in one minute.
C.   the maximum amount of air you can force out of your lungs after you have exhaled normally.
D.   the amount of air that moves in or out of the alveoli in one minute.
Question #8
The diaphragm and the external intercostal muscles contract to:
A.   decrease the volume of the thoracic cavity.
B.   increase the volume of the thoracic cavity.
C.   push venous blood away from the heart.
D.   increase the pressure in the pleural cavity.
Question #9
What is happening when one exhales?
A.   decrease in venous return and increase in venous return
B.   increase in venous return
C.   decrease in heart rate, diaphragm relaxes, and decrease in venous return
D.   decrease in heart rate

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