At high altitude, the RBCs in the human blood will
increase in size
decrease in size
increase in number
decrease in number
A child of blood group O cannot have parents of blood groups
AB and AB/O
A and B
B and B
O and O
What is true about T-lymphocytes in mammals?
They scavenge damaged cells and cellular debris
These are produced in thyroid
There are of three main types-cytoxic T-cells, helper T-cells and suppressor T-cells
These originate in lymphoid tissues
Haemophilia is
royal disease
faulty blood clotting
Both (a) and (b)
mosquito having haemocoel
Systemic heart refers to
enteric heart in lower vertebrates
the two ventricles together in humans
The heart that contracts under stimulation from nervous system.
left auricle and left ventricle in higher vertebrates
Continuous bleeding from an injured part of body is due to deficiency of
Vitamin-A
Vitamin-B
Vitamin-K
Vitamin-E
Examination of blood of a person suspected of having anaemia, shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following, is likely to alleviate his symptoms?
Thiamine
Folic acid and cobalamin
Riboflavin
Iron compounds
Glucose is carried from digestive tract to liver by
pulmonary vein
hepatic portal vein
hepatic artery
None of the above
Which one of the following vertebrate organs receives the oxygenated blood only?
Gill
Lung
Liver
Spleen
Wall of blood capillary is formed of
haemocytes
parietal cells.
endothelial cells
oxyntic cells
