Respiratory System Quiz PDF

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Respiratory System complete quiz...

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1.

The area of the gas exchange region of the lung in a normal person is: Select one:

c. about half the size of a tennis court.

5.

Select one: a. the pressure in the lung is greater than atmospheric b. the pressure in the plural cavity is greater than atmospheric c. the pressure in the lung is the same as atmospheric d. the pressure in the lung is less than atmospheric e. the pressure in the plural cavity is the same as atmospheric

a. about 10 square metres. b. about 20 square metres. c. about half the size of a tennis court. d. about the size of a football oval. e. none of the above 2.

Cartilage is found in:

c. the trachea and bronchi

Select one: a. all regions of the lung b. throughout the conducting regions of the lung c. the trachea and bronchi d. the plural cavity e. the bronchi and bronchioles 3.

4.

6.

Central chemoreceptors respond directly to Select one: a. hydrogen ion in the cerebrospinal fluid. b. CO2 in cerebrospinal fluid. c. low oxygen in the cerebrospinal fluid. d. low oxygen in the blood e. CO2 in the blood.

a. hydrogen ion in the cerebrospinal fluid.

Ciliated cells in the airways:

a. beat in a wave like manner to remove debris from the lung

a. beat in a wave like manner to remove debris from the lung b. beat in a random motion to keep mucus glands clear c. increase the surface area for reabsorption of fluid d. secrete pulmonary surfactant e. secrete mucus

During expiration:

During normal breathing:

a. the pressure in the lung is greater than atmospheric

a. inspiration is active and expiration is passive

Select one: a. inspiration is active and expiration is passive b. inspiration is passive and expiration is active c. inspiration is active and expiration is active d. inspiration is passive and expiration is passive e. none of the above are correct 7.

External intercostal muscles are c. involved in active inspiration Select one: a. connected to the lung by ligaments b. involved in expiration c. involved in active inspiration d. connected to the diaphragm e. connected to the collar bone

8.

For an average size person tidal b. 500 ml volume is approximately: Select one: a. 50 ml b. 500 ml c. 1000 ml d. 1500 ml e. 5000 ml

9.

10.

For an average size person total lung capacity is approximately: Select one: a. 2,000ml b. 3,500ml c. 5,000ml d. 7,500 ml e. 10,000 ml

c. 5,000ml

For effective gas exchange you need:

b. a large surface area and a small gas diffusion distance

Select one: a. a low gas pressure and a small gas diffusion distance b. a large surface area and a small gas diffusion distance c. a large surface area and a large gas diffusion distance d. a small surface area and large gas diffusion distance e. a high gas pressure and a small surface area 11.

Functional residual capacity is

The gas diffusion distance in the lung is approximately: Select one: a. 0.5 nm b. 5 nm c. 0.5 um d. 5 um e. 50 um

Gas exchange takes place in:

b. the alveolus.

Select one: a. the trachea and bronchioles of the lung. b. the alveolus. c. the lung connective tissue. d. the conducting regions of the lung. e. all regions of the lung. 14.

The internal intercostal muscles are used during

e. both c and d

Select one: a. inspiration b. passive expiration c. active expiration d. exercise e. both c and d 15.

e. both b and c are correct.

Select one: a. vital capacity minus the residual volume b. total lung capacity minus the inspiratory capacity c. total lung capacity minus inspiratory reserve volume and tidal volume. d. total lung capacity minus inspiratory reserve volume and expiratory reserve volume. e. both b and c are correct. 12.

13.

In which of the following conditions in blood stimulate peripheral chemoreceptors?

c. low oxygen and increased hydrogen ions

Select one: a. high CO2 and decreased hydrogen ions b. low oxygen and low CO2 c. low oxygen and increased hydrogen ions d. increased hydrogen ions and low CO2 e. high oxygen and high CO2. 16.

The Law of Young and Laplace describes Select one:

c. 0.5 um a. the collapsing pressure in the alveolus due to surface tension. b. how air moves in and out of the lung. c. the collapsing pressure of the whole lung d. the collapsing pressure in the capillaries. e. how blood moves through the capillaries in the lung.

a. the collapsing pressure in the alveolus due to surface tension.

17.

The oxygen saturation in venous blood is

b. 75%

22.

The partial pressure of carbon dioxide c. 45 mmHg in venous blood is

23.

Select one: a. 23 mmHg b. 40 mmHg c. 45 mmHg d. 75 mmHg e. 90 mmHg 19.

The partial pressure of oxygen in arterial blood is

The partial pressure of oxygen in venous blood is

d. 95 mmHg

24.

The plural cavity: Select one: a. is a sealed sac wrapped around each lung b. is connected to the lung and the ribs c. stops the lung from collapsing d. is filled with a lubricating fluid e. all of the above are correct.

b. 756 mmHg

25.

e. all of the above are correct.

Pulmonary capillaries

b. form a meshwork around the alveolus

Select one: a. have very thick walls because of the large pressure b. form a meshwork around the alveolus c. are very long and have a large resistance d. are made from type I cells e. are in close contact with the conducting region

b. 40 mmHg

Select one: a. 23 mmHg b. 40 mmHg c. 75 mmHg d. 95 mmHg e. 150mmHg 21.

Prior to inspiration the pressure in the plural cavity is: Select one: a. 710 mmHg b. 756 mmHg c. 760 mmHg d. 770 mmHg e. none of the above

Select one: a. 23 mmHg b. 40 mmHg c. 75 mmHg d. 95 mmHg e. 150 mmHg 20.

c. air enters the plural cavity

Select one: a. the ribs become stiff b. air enters the lung c. air enters the plural cavity d. the intercostal muscles are damaged e. the diaphragm is damaged

Select one: a. 98% b. 75% c. 50% d. 40% e. 23% 18.

A pneumothorax occurs when:

Pulmonary surfactant is produced and secreted by: Select one: a. alveolar macrophages b. alveolar type I cells c. ciliated cells d. alveolar type II cells e. goblet cells

d. alveolar type II cells

26.

The recoil of the lung during normal expiration is due:

c. to both the elastic fibres and surface tension in the lung

30.

Select one: a. to the rib cage compressing the lung b. to atmospheric pressure sucking the air out of the lung. c. to both the elastic fibres and surface tension in the lung d. entirely to surface tension in the lung. e. only to the collagen and elastin fibres in the lung 27.

Residual volume is Select one:

Select one:

e. the volume in the lung left after forced expiration

a. the volume of air left in the lung after normal expiration b. a volume that can be measured with a spirometer c. always larger than functional residual capacity d. the sum of functional residual capacity and expiratory reserve volume e. the volume in the lung left after forced expiration 28.

The total cross sectional area of the lung dramatically increases at

e. On expiration it can reduce surface tension as the alveolus gets smaller

a. it stops macrophages from digesting the lung b. On expiration it can increase surface tension as the alveolus gets smaller c. It lines the entire lung d. it helps the ciliated cells beat freely. e. On expiration it can reduce surface tension as the alveolus gets smaller 31.

Which cells would you expect to find in the alveolus:

c. Type I and type II cells

Select one: a. Clara cells and type II cells b. ciliated cells and type I cells c. Type I and type II cells d. Clara cells and macrophages e. goblet cells and macrophages 32.

Which is/are the main muscle/s of respiration

e. the diaphragm

Select one: d. airway generation number 15

Select one: a. airway generation number 5 b. airway generation number 8 c. airway generation number 12 d. airway generation number 15 e. airway generation number 23 29.

The unique property of pulmonary surfactant is that:

Total lung capacity is the sum of: a. vital capacity and residual volume Select one: a. vital capacity and residual volume b. inspiratory reserve volume and inspiratory capacity c. tidal volume, inspiratory capacity and expiratory reserve volume d. vital capacity, and functional residual capacity e. vital capacity and inspiratory capacity

a. the intercostal muscles b. abdominal muscles c. the accessory muscles d. scalenes e. the diaphragm 33.

Which of one of the following contain only components involved in the control of breathing? Select one: a. dorsal respiratory group, central chemoreceptors, pons b. pons, terminal bronchioles, central chemoreceptors. c. ventral respiratory group, bronchus, pneumotaxic centre. d. diaphragm, peripheral chemoreceptors, basal ganglia e. amygdala, ventral respiratory group, internal intercostal muscles

a. dorsal respiratory group, central chemoreceptors, pons

34.

35.

36.

d. peripheral Which of one of the following contains only components involved in the control chemoreceptors, of breathing? ventral respiratory group, pons Select one: a. pneumotaxic centre, peripheral chemoreceptors, hippocampus b. ventral respiratory group, central chemoreceptors, paraventricular nucleus. c. supra-optic nucleus, central chemoreceptors, scalenes d. peripheral chemoreceptors, ventral respiratory group, pons e. diaphragm, terminal bronchioles, central chemoreceptors Which of the following are all part of the c. the bronchi, the bronchioles conducting region of the lung. and the larynx Select one: a. the larynx, the bronchi and the alveolus b. the respiratory bronchioles, the bronchi and the pharynx c. the bronchi, the bronchioles and the larynx d. the pharynx, the trachea and the alveolus e. the trachea, bronchioles and the alveolar sac Which of the following is the correct set of partial pressures (mmHg) for nitrogen (N2), oxygen (O2) and carbon dioxide (CO2) and water vapour (WV) in humidified air at 1 atmosphere. Select one: a. N2 630, O2 120, CO2 0.3, WV 4.7 b. N2 620, O2 132, CO2 1.3, WV 4.7 c. N2 600, O2 120, CO2 0.3, WV 47 d. N2 580, O2 142, CO2 1.3, WV 47 e. N2 563, O2 149, CO2 0.3, WV 47

e. N2 563, O2 149, CO2 0.3, WV 47

37.

Which of the following statements is correct: Select one: a. carbon dioxide is only produced in muscle cells b. the concentration of carbon dioxide is higher in the arterial blood than in the tissues. c. the concentration of carbon dioxide is higher in venous blood than in arterial blood. d. the concentration of carbon dioxide is highest in the lung e. carbon dioxide is less soluble in blood than oxygen

38.

Which of the following statements is correct: Select one: a. the concentration of oxygen is highest in the heart. b. the concentration of oxygen in highest in the tissues c. the concentration of oxygen is higher in the venous blood than in the arterial blood. d. the concentration of oxygen is higher in the lung than in other tissues e. the concentration of oxygen is higher in the tissues than in the arterial blood.

c. the concentration of carbon dioxide is higher in venous blood than in arterial blood

d. the concentration of oxygen is higher in the lung than in other tissues

39.

Which of the following statements is correct? Select one: a. The majority of CO2 is transported in the blood dissolved in the plasma. b. CO2 binds to the same site as oxygen on haemoglobin c. Carbon monoxide binds to the same site as CO2 on haemoglobin. d. CO2 is transported in the blood bound to the outside of red blood cells e. The majority of CO2 is transported in the blood in the form of bicarbonate ions.

40.

Which of the following statements is incorrect Select one: a. diffusion of gas from the alveolus to the blood is directly proportional to the thickness of the barrier. b. diffusion of gas from the alveolus to the blood is directly proportional to the diffusion constant of the gas. c. diffusion of gas from the alveolus to the blood is directly proportional to the surface area. d. diffusion of gas from the alveolus to the blood is directly proportional to the partial pressure difference of the gas. e. carbon dioxide diffuses quicker than oxygen

The majority of CO2 is transported in the blood in the form of bicarbonate ions.

a. diffusion of gas from the alveolus to the blood is directly proportional to the thickness of the barrier.

41.

Which of the following statements is incorrect. Select one: a. The oxygen dissociation curve shifts to the right when the carbon dioxide concentration in the blood increases. b. The oxygen dissociation curve shifts to the right when the blood temperature increases. c. The oxygen dissociation curve shifts to the right when carbon monoxide is present in the blood. d. The oxygen dissociation curve shifts to the right when the blood becomes more acidic. e. The oxygen dissociation curve shifts to the right when 2,3 DPG is present in the blood.

42.

Which of the follow is the correct set of partial pressures (mmHg) for nitrogen (N2), oxygen (O2) and carbon dioxide (CO2) in dry air at 1 atmosphere. Select one: a. N2 650, O2 100, CO2 0.3 b. N2 620, O2 132, CO2 1.3 c. N2 600, O2 152, CO2 0.3 d. N2 632, O2 122, CO2 1.3 e. N2 610, O2 142, CO2 0.3

c. The oxygen dissociation curve shifts to the right when carbon monoxide is present in the blood.

c. N2 600, O2 152, CO2 0.3...