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14 Exakte Antworten 11 Text Antworten 426 Multiple Choice Antworten
Fenster schliessen

Surfactant:

 

Is composed of collagen and elastin

Decreases lung compliance

Decreases respiratory work

All the answers are correct

Fenster schliessen

Which of the below mentioned statements is incorrect

During inspiration pressure in alveoli decreases in reference to the atmosphere

During inspiration intrapleural pressure remains unchanged

Severe hydrothorax may impair vital capacity

Pneumothorax is a lung collapse due to intrusion of air into pleural cavity

Fenster schliessen

The significant reduction in lung diffusion capacity is manifested by

Hipoxemia and hypercapnia

Hipoxemia

Hipocapria

Hypercapnia

Fenster schliessen

Hering-Breuer reflex is triggered by

Stimulation of baroreceptors

Stimulation of chemoreceptors

Stimulation of stretch receptors

Stimulation of beta-receptors

Fenster schliessen
  1. If you treat a patient with bronchoconstriction using beta-agonist, a possible side effect which is:
A. saliva overproduction

B. increasing of blood pressure

C. tachycardia

D. excessive sweating

E. none from the above

Fenster schliessen

70% of CO2 transported in body is in form of?

D. Bicarbonates in plasma
Fenster schliessen

Most of Bicarbonates is formed in the:

 

A. plasma because of presence of carbonic anhydrase

B. platelets because of presence of carbonic anhydrase

C. leukocytes because of presence of carbonic anhydrase

D. erythrocytes because of presence of carbonic anhydrase

Fenster schliessen

Choose correct sentence:

 

A. RBC shrink during hemolysis in hypotonic solution of NaCl

B. hemoglobin of hemolyzed RBC dissolves in the erythrocyte

C. hemoglobin of hemolyzed RBC enters plasma

D. hemolysis does not occur in distilled water

Fenster schliessen

9. Sudden decrease in atmospheric oxygen concentration will:

a) cause increase in heart rate and decrease in breath rate

b) increase in cardiac output and breath rate

c) will not influence significantly respiratory and cardiovascular physiology

d) decrease in diastolic blood pressure

Fenster schliessen

The symptom of overactivity of parasympathetic system is:

a. tachycardia

b. slowed heart rate

c. constriction of bronchi

d. answers b and c are correct

Fenster schliessen

2)  Pressure and volume of gas in a container are related to temperature and number of gas molecules. This is known as ________ law.

A) Henry's

B) Boyle's

C) the ideal gas

D) Ohm's

E) Dalton's

Fenster schliessen

6) Alveolar ventilation refers to the

A) utilization of oxygen by alveolar cells to support metabolism.

B) movement of dissolved gases from the blood to the alveoli.

C) movement of air into and out of the alveoli.

D) movement of dissolved gases from the alveoli to the blood.

E) movement of air into and out of the lungs.

Fenster schliessen

15) Which of the following features of the alveolar sacs allows for the ease of diffusion of gasses?

A) Type II alveolar cells secrete surfactant.

B) They are made of a single layer of simple squamous epithelium and elastin fibers allow the alveoli to stretch thin enough for diffusion to occur.

C) Elastin fibers allow the alveoli to stretch thin enough for diffusion to occur.

D) They are made of a single layer of simple squamous epithelium.

Fenster schliessen

19) Dalton's law states that

A) in a mixture of gases like air, the total pressure is the sum of the individual partial pressures of the gases in the mixture.

B) gas volume and pressure are inversely proportional.

C) the volume of gas that will dissolve in a solvent is proportional to the solubility of the gas and the gas pressure.

D) gas volume and temperature are directly proportional.

E) None of the answers are correct.

Fenster schliessen

22)  In quiet breathing,

A) inspiration involves muscular contractions and expiration is passive.

B) inspiration and expiration are both passive processes.

C) inspiration is passive and expiration involves muscular contractions.

D) inspiration and expiration involve muscular contractions.

E) None of the answers are correct.

Fenster schliessen

23)  Boyle's law states that gas volume is

A) inversely proportional to pressure.

B) directly proportional to pressure.

C) inversely proportional to temperature.

D) directly proportional to temperature.

E) None of the answers are correct.

Fenster schliessen

25)  A typical value for intrapleural pressure is ________ mm Hg.

A) +6

B) -3

C) -6

D) +3

E) 0

Fenster schliessen

30)  If a student inhales as deeply as possible and then blows the air out until he cannot exhale any more, the amount of air that he expelled is his

A) vital capacity.

B) expiratory reserve volume.

C) tidal volume.

D) minimal volume.

E) inspiratory reserve volume.

Fenster schliessen

33)  In the lungs, the

A) blood flow rate and the blood pressure are the same as in other tissues.

B) blood flow rate is higher and the blood pressure is higher, respectively, than the blood flow rate and the blood pressure in other tissues.

C) blood flow rate is lower and the blood pressure is lower, respectively, than the blood flow rate and the blood pressure in other tissues.

D) blood flow rate is lower and the blood pressure is higher, respectively, than the blood flow rate and the blood pressure in other tissues.

E) blood flow rate is higher and the blood pressure is lower, respectively, than the blood flow rate and the blood pressure in other tissues.

Fenster schliessen
  1. 35)  Flow of air

A) is directly proportional to the resistance, and flow increases as the resistance of the system increases.

B) is directly proportional to the resistance, and flow decreases as the pressure of the system increases.

C) is directly proportional to a pressure gradient, and flow increases as the resistance of the system increases.

D) is directly proportional to a pressure gradient, and flow decreases as the resistance of the system increases.

E) None of the answers are correct.

Fenster schliessen

36) An increase in PCO2 would cause

A) the bronchioles to dilate and the systemic arterioles to dilate.

B) the bronchioles to dilate and the systemic arterioles to constrict.

C) the bronchioles to constrict and the systemic arterioles to constrict.

D) the bronchioles to constrict and the systemic arterioles to dilate.

E) None of the answers are correct.

Fenster schliessen

37) Chronic inhalation of fine particles that reach the alveoli leads to ________ lung disease.

A) obstructive

B) fibrotic

C) compliant

D) restrictive

E) congestive

Fenster schliessen

4)  Of the factors that influence diffusion of respiratory gases, the most variable and, therefore, 4) important factor to consider is the

A) membrane surface area.

B) diffusion distance.

C) membrane thickness.

D) concentration gradient.

E) electrical charge.

Fenster schliessen

6)  The lung pathology most likely to result from certain kinds of heart disease is

A) emphysema.

B) lung cancer.

C) asthma.

D) pulmonary edema.

E) fibrotic lung disease.

Fenster schliessen

7)  Hypoxia resulting from fluid accumulation in the alveoli that cannot be corrected by oxygen 7) therapy can lead to

A) fibrotic lung disease.

B) sudden infant death syndrome.

C) emphysema.

D) adult respiratory distress syndrome.

E) asthma.

Fenster schliessen

12)  At a PO2 of 70 mm Hg and normal temperature and pH, hemoglobin is ________% saturated with oxygen.

A) 75

B) 50

C) 10

D) over 90

E) 25

Fenster schliessen

13)  Which of the following would make the oxygen-hemoglobin curve shift right?

 

shift to the right = decreased O2 affinity 

A) increased pH

B) increased H+ concentration

C) decreased CO2

D) decreased temperature

E) None of the answers are correct.

Fenster schliessen

16) In the medulla oblongata, the nucleus tractus solitarius contains the ________ of neurons.

A) ventral respiratory group

B) pre-Botzinger complex

C) dorsal respiratory group

D) pontine respiratory group

Fenster schliessen

17)  The most important chemical regulator of respiration is

A) oxygen.

B) sodium ion.

C) hemoglobin.

D) bicarbonate ion.

E) carbon dioxide.

Fenster schliessen

18)  An increase in the level of carbon dioxide in the blood will

A) decrease the rate of breathing.

B) increase the rate of breathing.

C) increase the pH of arterial blood.

D) decrease pulmonary ventilation.

E) decrease the alveolar ventilation rate.