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PHYSIOLOGY II, COLLOQUIUM 1 (RESPIRATORY SYSTEM + weekly test)

Terms in this set (12)

general functions of the respiratory system
- transport of O2 and CO2 between external environment and cells

- protective function

- acid-base balance regulation

- temperature regulation

- blood flow regulation

- sound production
Stages of respiration
...
What from mentioned occurs during the quiet expiration?


a.) Pressure in alveoli increases above the atmospheric

b.) Internal intercostal muscles contract

c.) External intercostal muscles contract

d.) Pressure in the pleural cavity increases

e.) Diaphragm moves up
a) Pressure in alveoli increases above the atmospheric

d.) Pressure in the pleural cavity increases

e.) Diaphragm moves up
What is correct about the oxygen diffusion and transport with blood?

a.) Its partial pressure in venous blood is higher than in arterial blood

b.) More than 90% of oxygen is transported in blood bound to hemoglobin

c.) More of O2 than CO2 diffuses through the blood vessel wall for the same partial pressure difference across it

d.) It diffuses from blood in the large circuit capillaries into tissues

e.) The most of it is transported in dissolved form in blood plasma
b.) More than 90% of oxygen is transported in blood bound to hemoglobin

d.) It diffuses from blood in the large circuit capillaries into tissues
What is correct about the deep expiration?

a.) During it neck muscles contract

b.) During it pleural pressure can become positive

c.) During it abdominal muscles contact

d.) During it alveolar pressure becomes lower than during quiet expiration

e.) During it diaphragm contracts
b.) During it pleural pressure can become positive

c.) During it abdominal muscles contact
Which wavelength light is more absorbed by deoxyhemoglobin?
- 940nm
Which of these factors can decrease hemoglobin affinity for oxygen?

a.) Increased partial pressure of O2

b.) Decreased pH

c.) Decreased partial pressure of CO2

d.) Decreased concentration of 2,3-diphosphoglycerate

e.) Increased temperature
b.) Decreased pH

e.) Increased temperature
What is correct about the ventilation and perfusion in lungs in the vertical position of person?

a.) Lower ventilation than perfusion leads to rise of partial pressure of CO2 in alveoli

b.) Ventilation-perfusion ratio in apex is more than 1

c.) Perfusion is greater in bottom part of the lung

d.) Ventilation is greater in the upper part of lungs than in the lower

e.) In parts of the lung with low ventilation-perfusion ratio bronchoconstriction is stimulated
a.) Lower ventilation than perfusion leads to rise of partial pressure of CO2 in alveoli

b.) Ventilation-perfusion ratio in apex is more than 1

c.) Perfusion is greater in bottom part of the lung
What is correct about the anatomical dead space?

a.) It includes air volume in bronchi

b.) It includes alveoli where gas exchange does not take place

c.) Its size increases due to bronchoconstriction

d.) It can be measured from the partial pressure of oxygen changes in the expired air

e.) Its volume is about 120 ml in adult person
a.) It includes air volume in bronchi

e.) Its volume is about 120 ml in adult person
What can stimulate respiratory center to trigger deeper respiration?

a.) Activation of stretch receptors in airways

b.) Activation of juxtacapillary receptors in lungs

c.) Lower partial pressure of O2 in blood

d.) Lower pH of the blood

e.) Decreased partial pressure of CO2 in blood
c.) Lower partial pressure of O2 in blood

d.) Lower pH of the blood
How much is the partial pressure of oxygen in the arterial blood
100mmHg
What does not cause bronchodilation?

a.) Decreased partial pressure of CO2

b.) Histamine

c.) Prostacyclin

d.) Acetylcholine

e.) Norepinephrine
b.) Histamine

e.) Norepinephrine
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