Life Science 6
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Respiratory system
- 1.Which of the following best describes the main function of the human respiratory system?
- A.
to enable oxygen to move from blood to air and carbon dioxide to move from air to blood;
- B.
To enable oxygen to move from blood to air and carbon monoxide to move from air to blood;
- C.
to enable oxygen to move from air to blood and carbon monoxide to move from blood to air;
- D.
to enable oxygen to move from air to blood and carbon dioxide to move from blood to air
- 2.Which one of the following is NOT an accessory function of the human respiratory system?
- A.
Losing body heat;
- B.
Filtering materials from the circulation;
- C.
Transport of gases to tissues
- D.
Metabolism of some compounds;
- 3.Which one of the following is NOT a component of the lower part of the respiratory tract?
- A.
Trachea;
- B.
Bronchi
- C.
Lungs
- D.
pharynx
- 4.Which of the following is NOT a function of the nose?
- A.
Detection of smells;
- B.
Humidifying of inspired air;
- C.
Gas exchange
- D.
filtering of inspired air
- 5.Which of the following best describes the order of components of the airway after the trachea?
- A.
Bronchi, bronchioles, alveolar ducts, alveoli;
- B.
Bronchi, alveoli, bronchioles, alveolar ducts
- C.
Alveolar ducts, bronchioles, bronchi, alveoli
- D.
Bronchioles, alveolar ducts, alveoli, bronchi
- 6.Which of the following are the smallest and most numerous of the components of the airway?
- A.
Bronchi;
- B.
Alveoli;
- C.
alveolar ducts
- D.
Bronchioles
- 7.Which of the following has the greater volume?
- A.
Conducting portion of respiratory tract;
- B.
Respiratory portion of respiratory tract
- 8.Which of the following is/are a portion of the respiratory zone of the respiratory tract?
- A.
Bronchi
- B.
Alveoli
- C.
Trachea
- D.
Larynx
- 9.Which of the following is/are a portion of the conducting zone of the respiratory tract?
- A.
Alveolar ducts
- B.
Alveoli
- C.
Trachea
- D.
Respiratory bronchioles
- 10.Which one of the following is NOT true concerning the structure of the pleura?
- A.
the pleural membrane covers both the inside of the chest wall and the outside of the lung on each side of the chest;
- B.
Each pleural membrane is several cells in thickness;
- C.
Each pleural membrane is an epithelial tissue
- D.
The pleural cavity contains a small amount of serous (watery) fluid.
- 11.Gas exchange in the body always involves
- A.
Cellular respiration;
- B.
breathing movements
- C.
diffusion across membranes
- D.
Active transport of gases
- 12.Which of the following best describes the process known as ventilation?
- A.
the process of moving air into and out of the lungs;
- B.
The process of gas exchange between blood and air;
- C.
The process of moving air into and out of the upper part of the respiratory tract;
- D.
The process of gas exchange between blood in the systemic capillaries and tissue fluid.
- 13.Which one of the following statements is true concerning the diaphragm?
- A.
it separates the abdominal and pelvic cavities;
- B.
It has both fibrous and muscular parts;
- C.
It is not involved in forced expiration
- D.
It is a perfectly flat structure
- 14.Which of the following best describes the process known as external respiration?
- A.
the process of moving air into and out of the lungs;
- B.
He process of gas exchange between blood and air;
- C.
The process of moving air into and out of the upper part of the respiratory tract;
- D.
The process of gas exchange between blood in the systemic capillaries and tissue fluid.
- 15.Which of the following best describes the process known as internal respiration?
- A.
The process of moving air into and out of the lungs
- B.
The process of gas exchange between blood and air;
- C.
the process of moving air into and out of the lower part of the respiratory tract;
- D.
the process of gas exchange between blood in the systemic capillaries and tissue fluid
- 16.The lower side of the lung cavity is formed by
- A.
Diaphragm
- B.
Oesophagus
- C.
Stomach
- D.
Rib
- 17.Which one of the following is NOT true regarding expiration?
- A.
It is normally an active process;
- B.
At rest, it typically relies only on the elastic recoil of the lungs;
- C.
In forced expiration, the internal intercostal muscles may be used;
- D.
it aims to generate a pressure gradient to the external atmosphere from the interior of the chest cavity;
- 18.Which one of the following processes causes the movement of gases between air and blood?
- A.
Osmosis;
- B.
Phagocytosis
- C.
Diffusion
- D.
Active transport
- 19.To which circulation do the capillaries involved in gas exchange in the lung belong?
- A.
Systemic
- B.
Portal
- C.
Peri-tubular
- D.
Pulmonary
- 20.Which component of the airway is most important in gas exchange in the lung?
- A.
Bronchus
- B.
Trachea
- C.
Alveolus;
- D.
Bronchiole
- 21.Which one of the following structures is NOT part of the barrier that gases have to cross in moving between blood and air?
- A.
Lining of capillary blood vessel
- B.
a basement membrane
- C.
cartilage
- D.
Interstitial fluid
- 22.What is the approximate total area of the surface avaialble for gas exchange (considering both lungs together)?
- A.
50 -100 sq m
- B.
5 - 10 sq m;
- C.
5 - 50 sq m
- D.
50 - 200 sq m
- 23.What part of the blood is most efficient at carrying oxygen
- A.
Blood plasma solution
- B.
Blood plasma proteins
- C.
blood platelets
- D.
Haemoglobin molecules of red blood cells
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