Q4.10. Marathon runners can lose a great deal of Na* (through sweat). Some runners

Biology

1 answer:

geniusboy [140]3 years ago

6 0

Answer:

Explanation:

Basically Na+ is an extracellular ions, while K+ is intracellular. Therefore the influx of Na+ produce depolarization and excitability of a neuron, while K- ions outflow from the axoplasm ensures re-polarization to return neuron to its resting state.

Therefore an Athletes , loosing a lot of Na+, and drinking water experiences hyponatremia. Therefore the neuron in this case experiences low Na+ concentration , with reduction in solute potential of the axoplasm, , with consequent high water potential.

Therefore the neuron swells up with water, and difficult to depolarize to propagate action potential.This leads to loss of sensory control in the athletes, leading to confusion.

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