MCQ
Hormones may be
- AAmino acid derivatives
- BPeptides
- CSteroids
- ✓All the above
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$I.$ Breathing or pulmonary ventilation
$II.$ Diffusion of $O _{2}$ and $CO _{2}$ between blood and tissues
$III.$ Transport of gases by blood
$IV.$ Utilisation of $O_{2}$ by cells
$V.$ Diffusion of $O _{2}$ and $CO _{2}$ across the alveolar membrane
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