Oxygen binding to haemoglobin in blood is
directly proportional to the concentration of CO2 in the medium
inversely proportional to the concentration of CO2 in the medium
directly proportional to the concentration of CO in the medium
independent of the concentration of CO in the medium
B.
inversely proportional to the concentration of CO2 in the medium
Bohr's effect is the phenomenon whereby the affinity of the respiratory pigment i.e., haemoglobin in the blood for oxygen is reduced when the level of carbon dioxide is increased. An increase in carbon dioxide concentration makes the blood more acidic which results in decrease in the efficiency of the uptake of oxygen by haemoglobin molecules. This facilitates gaseous exchange, because more oxygen is released in the tissues where the amount of carbon dioxide is rising due to metabolic activity. In its reverse, more oxygen is taken up at the lungs where the amount of carbon dioxide is low.
At high altitude, RBC's of human blood will
increase in number
decrease in number
decrease in size
increase in size
Assertion: Smoking causes oxygen deficiency in the body.
Reason: Carbon monoxide when inhaled while smoking, combines with haemoglobin to form chemically stable compound.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Hiccups can be best described as
forceful sudden expiration
forceful contraction of intercostal muscles during deep breathing
vibration of the soft palate during breathing while sleeping
jerky incomplete inspiration.
Which of the following products are obtained by anaerobic respiration from yeast?
Alcohols
CO2
Beer and Wine
All of the above
Which part of the nephrons is impermeable to water
Proximal convoluted tubule
Distal convoluted tubule
Ascending limb of loop of Henle
Descending limb of loop of Henle
During anaerobic conditions, the rate of glycolysis increases, is called
compensation point
extinction point
Warburg effect
Pasteur effect
