ABO blood groups in humans are controlled by the gene I, It has three alleles - IA, IB and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?
The haemoglobin content per 100 mL of blood of a normal healthy human adult is
In a standard ECG, which one of the following alphabets is the correct representation of the respective activity of the human heart?
R-repolarisation of ventricles
S- start of systole
T -end of diastole
P- depolarization of the atria
The diagram given here is the standard ECG of a normal person. The P- wave represents the
Contraction of both the atria
initiation of the ventricular contraction
the beginning of the systole
end of systole
Which one of the following human organs is often called the “graveyard” of RBCs?