MEDIUM
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Human fetal hemoglobin differs from the adult hemoglobin in that it has:

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Important Questions on Respiration and Circulation

EASY
Which of the following factors are favourable for the formation of oxyhaemoglobin in the alveoli human lungs?
EASY
The partial pressure of oxygen in the alveoli of the lungs is:
EASY

Match the following?

List I List II
i) PO2 of alveoli lungs a)  40 mmHg
ii) PO2 of atmosphenc air b)  95 mmHg
iii) PO2 of deoxygenated blood c)  104 mmHg
iv) PO2 of oxygenated blood d)  159 mmHg

 

EASY
Study the following statements and pick up the correct one:
MEDIUM

Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli.

EASY
Right side shift of oxygen-haemoglobin dissociation curve occurs during
EASY
What is the maximum number of oxygen atoms that a molecule of haemoglobin can bind?
EASY
Which of the following graphs best describes the oxygen dissociation curve where pO2 is the partial pressure of oxygen?
EASY
Which of the following factors favour the right side shift of the oxygen dissociation curve?
HARD

Study the following oxygen-haemoglobin dissociation curve which explains the effect of pH on the saturation of haemoglobin with oxygen. Find out an option that gives the correct descending order of pH for x, y and z.

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MEDIUM
Identify the wrong statement with reference to transport of oxygen.
MEDIUM

In the given graph curves A, B and C represent the relation between partial pressure of oxygen pO2 and saturation of haemoglobin with oxygen. If curve A represents the condition of blood in a regular artery then please select the correct statement from below.

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EASY
The pH of the avian blood is maintained by
EASY
The maximum number of oxygen molecules that can bind to one molecule of hemoglobin is:
EASY
Identify the correct group of statements
(i) Oxygen is carried by Haemoglobin.
(ii) Oxygen is carried by carbonic anhydrase.
(iii) Carbon dioxide is carried by Haemoglobin.
(iv) Sulphur dioxide is carried by Haemoglobin.
MEDIUM

Study the following forms of transport of respiratory gases
A) CO2 as bicarbonates
B) O2 through plasma
C) CO2 as carbamino compounds
D) O2 through RBC
E) CO2 in a dissolved state
Arrange the above in sequence in ascending order based on their percentages.

EASY
The element whose percentage weight is highest in both earth's crust and human body is
EASY
Athletes are often trained at high altitude because