A vein possesses a large lumen because
tunica media and tunica externa form a single coat
tunica interna and tunica media form a single coat
tunica interna, tunica media and tunica externa are thin
tunica media is a thin coat
The exchange of gases in the alveoli of the lungs takes place by
simple diffusion
osmosis
active transport
passsive transport
Haemophilia is
royal disease
faulty blood clotting
Both (a) and (b)
mosquito having haemocoel
Haemoglobin is a type of
carbohydrate
vitamin
skin pigment
respiratory pigment
Chloride shift occurs in response to
HCO-3
K+
H+
Na+
In the ABO system of blood groups, if both antigens are present but no antibody, the blood group of the individual would be
B
O
AB
A
The carbon dioxide is transported via blood to lungs as
dissolved in blood plasma
in the form of carbonic acid only
in combination with haemoglobin only
carbaminohaemoglobin and as carbonic acid
Continuous bleeding from an injured part of body is due to deficiency of
Vitamin-A
Vitamin-B
Vitamin-K
Vitamin -E
The haemoglobin of a human foetus
has a lower affinity for oxygen than that of the adult
its affinity for oxygen is the same as that of an adult
has only 2 protein subunits instead of 4
has a higher affinity for oxygen than that of an adult
Which one of the following organs in the human body is most affected due to shortage of oxygen?
Intestine
Skin
Kidney
Brain
