১.
Which is not a part of Respiratory Unit (also called respiratory lobule)
ব্যাখ্যা
Reference: Guyton 14th; P- 515
PrepBank · বিষয়ভিত্তিক প্রশ্ন
Gas Exchange
Gas Exchange
PrepBank · পাতা ১ / ১ · ১–২১ / ২১
২.
Gas exchange unit of lung
ব্যাখ্যা
Davidson 24th
৩.
Greater portion of CO2 trandsported to lung by binding with
ব্যাখ্যা
৪.
Which of the following is responsible for the movement of O2 from the alveoli into the blood in the pulmonary capillaries?
ব্যাখ্যা
Respiratory gases pass through the alveolar capillary membrane by passive diffusion.
৫.
Lungs apics have following zone of blood flow
ব্যাখ্যা
Zones 1, 2, and 3 of Pulmonary Blood Flow
The capillaries in the alveolar walls are distended by the blood pressure inside them but simultaneously are compressed by the alveolar air pressure on their outsides. Therefore, whenever the lung alveolar air pressure becomes greater than the capillary blood pressure, the capillaries close, and there is no blood flow.
Under different normal and pathological lung conditions, one may find any one of three possible zones (patterns) of pulmonary blood flow, as follows:
Zone 1: No blood flow during all portions of the cardiac cycle because the local alveolar capillary pressure in that area of the lung never rises higher than the alveolar air pressure during any part of the cardiac cycle
Zone 2: Intermittent blood flow only during the peaks of pulmonary arterial pressure because the systolic pressure is then greater than the alveolar air pressure, but the diastolic pressure is less than the alveolar air pressure
Zone 3: Continuous blood flow because the alveolar capillary pressure are remains greater than alveolar air pressure during the entire cardiac cycle
Normally, the lungs have only zones 2 and 3 blood flow-zone 2 (intermittent flow) in the apices and zone 3 (continuous flow) in all the lower areas.
The capillaries in the alveolar walls are distended by the blood pressure inside them but simultaneously are compressed by the alveolar air pressure on their outsides. Therefore, whenever the lung alveolar air pressure becomes greater than the capillary blood pressure, the capillaries close, and there is no blood flow.
Under different normal and pathological lung conditions, one may find any one of three possible zones (patterns) of pulmonary blood flow, as follows:
Zone 1: No blood flow during all portions of the cardiac cycle because the local alveolar capillary pressure in that area of the lung never rises higher than the alveolar air pressure during any part of the cardiac cycle
Zone 2: Intermittent blood flow only during the peaks of pulmonary arterial pressure because the systolic pressure is then greater than the alveolar air pressure, but the diastolic pressure is less than the alveolar air pressure
Zone 3: Continuous blood flow because the alveolar capillary pressure are remains greater than alveolar air pressure during the entire cardiac cycle
Normally, the lungs have only zones 2 and 3 blood flow-zone 2 (intermittent flow) in the apices and zone 3 (continuous flow) in all the lower areas.
৬.
O2 level in peripheral circulation depends on?
ব্যাখ্যা
কোন ব্যাখ্যা যোগ হয় নি।
৭.
Find the true
ব্যাখ্যা
কোন ব্যাখ্যা যোগ হয় নি।
৮.
1st line investigation of Pulmonary embolism
ব্যাখ্যা
Davidson 24th
৯.
The ultimate goal of respiration is to maintain proper concentrations of the following in the tissues except?
ব্যাখ্যা
The ultimate goal of respiration is to maintain proper concentrations of O2, CO2 & H+
১০.
Acute type 2 respiratory failure occurs in
১১.
The decrease in O2 affinity of hemoglobin when the pH of blood falls is called the
ব্যাখ্যা
[Ganong 24th p-643]
১২.
The ultimate goal of respiration is to maintain proper concentrations of the following in the tissues except?
ব্যাখ্যা
Reference: Guyton 14th; P- 533
১৩.
Factors that shift 02-Hb dissociation curve to left
ব্যাখ্যা
Reference: Guyton 14th; P- 526
১৪.
Maximum CO2 is transported as
ব্যাখ্যা
Reference: Guyton 14th; P- 528
১৫.
A-a gradient normal in
১৬.
Diffusion of gas through respiratory membrane is inversly proportional to
ব্যাখ্যা
Guyton 13 th page 522
১৭.
Va/Q is infinity in
ব্যাখ্যা
Va/Q is infinity : No perfusion but ventilation remains normal.
Causes:
1. Embolism
2. Emphysema
3.Bronchiectasis
১৮.
Maximum percentage of 02 is present in
ব্যাখ্যা
Reference: Guyton 14th; P- 513
১৯.
Parameter in venous blood
ব্যাখ্যা
ABC of Biochemistry 6th - P:362
২০.
O2-Hb dissociation curve becomes almost flat when PO2 becomes....mmHg?
ব্যাখ্যা
Explanation:
২১.
Factors shifting O2-Hb curve to left