Microcytosis, i.e. decrease in the size of RBCs occurs:
– In iron deficiency anaemia,
– During prolonged forced breathing and
– When osmotic pressure of the blood is increased.
I am unable to understand how forced breathing results in microcytosis.
My attempt: I think prolonged forced breathing results in low CO2 concentration in blood which would lead to low H+ ion concentration , but this would lead to hypo-osmic plasma, which would certainly produce macrocytosis.
Source:Textbook of physiology