Download 6.4 Take Home Quiz 1. Draw a labelled diagram to show the human

6.4 Take Home Quiz
1.
Draw a labelled diagram to show the human ventilation system.
(4)
2.
Outline how coronary thrombosis can be caused.
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(2)
3.
Capillaries surround the alveoli in the lungs. Which pair of statements correctly describes the
concentrations of oxygen and carbon dioxide in the lungs?
Oxygen
Carbon dioxide
A.
Higher in the capillaries
Higher in the alveoli
B.
Lower in the capillaries
Higher in the alveoli
C.
Lower in the alveoli
Higher in the capillaries
D.
Higher in the alveoli
Higher in the capillaries
(Total 1 mark)
4.
What change occurs to the pressure and volume of the lungs when the external intercostal muscles
contract?
A.
Both pressure and volume increase.
B.
Pressure increases and volume decreases.
C.
Pressure decreases and volume increases.
D.
Both pressure and volume decrease.
(Total 1 mark)
5.
What normally prevents the membranes of the alveoli from sticking together during expiration?
A.
The thickness of the single-cell layer of alveoli membranes
B.
The secretion of fluids in the inner surface of the alveoli
C.
The pressure within the thoracic cavity
D.
The dense net of capillaries covering the alveoli
(Total 1 mark)
5.
Which of the following is part of the process of cellular respiration?
A.
Changes in the volume of the thoracic cavity
B.
Exchange of gases across the surface of the alveoli
C.
Exchange of gases across the surface of capillaries
D.
Glycolysis
(Total 1 mark)
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6.
What is the function of the structure labelled X?
[From: www.medical-look.com/human_anatomy/organs/Lungs.html]
A.
Gas exchange
B.
Ventilation
C.
Respiration
D.
Inspiration
(Total 1 mark)
7.
Which muscles contract to cause air to pass into the lungs through the trachea?
A.
Internal intercostal muscles and diaphragm
B.
Internal intercostal muscles and abdomen wall muscles
C.
External intercostal muscles and diaphragm
D.
External intercostal muscles and abdomen wall muscles
(Total 1 mark)
8.
What causes air to be breathed out by the lungs?
A.
The diaphragm relaxes and the ribs fall.
B.
The ribs rise and the external intercostal muscles relax.
C.
The internal intercostal muscles contract and the ribs rise.
D.
The diaphragm contracts and internal intercostal muscles contract.
(Total 1 mark)
9.
Which feature maintains a high concentration gradient of gases in the ventilation system?
A.
Thin-walled alveoli
B.
Thin-walled capillaries
C.
A moist lining of the alveoli
D.
Blood flowing in the capillaries
(Total 1 mark)
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