CO is harmful to human being because
it decreases CO2 concentration
it competes O2 to combine with haemoglobin
it is carcinogenic
it depletes O2 layer
B.
it competes O2 to combine with haemoglobin
Haemoglobin forms a stable compound with CO. The affinity of haemoglobin for CO is 200 times more than for O2 so even 0.1% CO blocks 50% haemoglobin of the body due to which oxygen carrying capacity of blood is decreased. This is called hypoxia.
Which of the following substances, if introduce in the blood stream, would cause coagulation, at the site of its introduction?
Fibrinogen
Prothrombin
Heparin
Thromboplastin
The first heart sound is produced when
diastole begins
semilunar valve close quickly
interventricular pressure decrease
bicuspid and tricuspid valve close quickly
G-6-P dehydrogenase deficiency is associated with haemolysis of
lymphocytes
RBCs
platelets
leucocytes
The epithelial lining in the alveoli of the frogs facing lung cavity is
squamous ciliated
columnar ciliated
columnar nonciliated
squamous nonciliated
Haemophilia is more commonly seen in human males than in human females because
this disease is due to an X- linked dominant mutation
a greater proportion of girls die in infancy
this disease is due to an X- linked recessive mutation
this disease is due to a Y- linked recessive mutation
