In high-altitude regions,the $R.B.C.$ count in humans will . . . . . . .

  • A
    Increase in size
  • B
    Decrease in size
  • C
    Increase in number
  • D
    Decrease in number

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Similar Questions

Match the following columns and select the correct option:
Column $I$ Column $II$
$(a)$ Pneumotaxic Centre $(i)$ Alveoli
$(b)$ $O_{2}$ Dissociation curve $(ii)$ Pons region of brain
$(c)$ Carbonic Anhydrase $(iii)$ Haemoglobin
$(d)$ Primary site of exchange of gases $(iv)$ $R.B.C.$

Find out the false statement.

Which two of the following changes $(i-iv)$ usually tend to occur in plain dwellers when they move to high altitudes ($3,500 \ m$ or more)?
$(i)$ Increase in red blood cell size
$(ii)$ Increase in red blood cell production
$(iii)$ Increased breathing rate
$(iv)$ Increase in thrombocyte count
Changes occurring are

$A$: When a person starts doing exercise,the rate and depth of breathing increase even before there are changes in $pO_2$,$pCO_2$,or $H^+$ concentration.
$R$: The main stimulus for these quick changes is due to input from the proprioreceptors,which monitor movements of joints and muscles.

The total pulmonary ventilation is related to the metabolic rate of the body as:

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