Question

Normal mean red cell volume is  _____________

(a) 6 ± 10 f/l

(b) 16 ± 10 f/l

(c) 86 ± 10 f/l

(d) 56 ± 10 f/l

I got this question in class test.

Question is from Biofeedback Instrumentation in portion Biomedical Recorders of Biomedical Instrumentation

Answer 1

Right option is (c) 86 ± 10 f/l

To explain: Normal mean red cell volume is 86 ± 10 f/l. In diseased conditions, it may fall to 50 f/l or rise upto 150 f/l. 1f/l = 10–15. 1 litre of blood contains 0.45 litres of red cells and if there are 5 ¥ 1012 red cells per litre.