MCQ
Saltatory conduction of nerve impulse takes place through.
- ✓Myelinated fibre.
- BNon$-$myelinated fibre.
- CGrey fibres.
- DNone of these.
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$I.$ $PCT$ $II.$ $DCT$
$III.$ Loop of Henle $IV.$ Collecting duct
Which contributes most in maintaining $pH$ of blood?