<p><img src="images/Na.jpg" alt="" /></p>
<p style="text-align: justify;"><span id="result_box" lang="fr"><span class="hps alt-edited">Le sodium</span> <span class="hps">(Na)</span> <span class="hps alt-edited">est le cation extracellulaire</span> <span class="hps">le plus important</span> <span class="hps">ainsi que l'électrolyte</span> <span class="hps">le plus important</span> <span class="hps">dans le maintien de</span> <span class="hps">la</span> <span class="hps">pression</span> <span class="hps">osmotique</span> <span class="hps">dans les cellules</span> <span class="hps">et les tissus.</span> <span class="hps">Les</span> <span class="hps">pertes endogènes</span> <span class="hps">pour</span> <span class="hps">les chevaux adultes</span> <span class="hps">à</span> <span class="hps">l'entretien</span> <span class="hps alt-edited">sont calculées</span> <span class="hps">pour être</span> <span class="hps">de 15 à 20</span> <span class="hps">mg</span> <span class="hps">/</span> <span class="hps">kg de poids corporel</span> <span class="hps">/ jour</span> <span class="hps atn">(</span><span>Meyer</span> <span class="hps">et al</span>, <span class="hps">1984;</span><span>.</span> <span class="hps">Schryver</span> <span class="hps">et al</span><span>., 1987</span><span>)</span><span>.</span> <span class="hps">Si nous supposons</span> <span class="hps">que le sodium</span> <span class="hps">est absorbé</span> <span class="hps">à 100%</span><span>,</span> <span class="hps alt-edited">alors</span> <span class="hps">un cheval</span> <span class="hps alt-edited">de 500</span> <span class="hps">kg de poids</span> <span class="hps alt-edited">corporel aura besoin de</span> <span class="hps">7,5 grammes</span> <span class="hps">de sodium par jour</span>. <span class="hps alt-edited">L'exercice et des températures</span> <span class="hps">ambiantes élevées</span> <span class="hps">augmentent les besoins en</span> <span class="hps">sodium</span> <span class="hps alt-edited">car les chevaux</span> <span class="hps">vont perdre</span> <span class="hps">des quantités importantes de</span> <span class="hps">sodium</span> <span class="hps">par la sueur</span><span>.</span> <span class="hps">Il</span> <span class="hps">est donc difficile de</span> <span class="hps alt-edited">calculer des besoins en</span> <span class="hps">sodium</span> <span class="hps alt-edited">précis dans</span> <span class="hps">un logiciel</span> <span class="hps">nutritionnel</span>. <span class="hps">Heureusement</span>, <span class="hps">tous les mammifères</span> <span class="hps">excrètent</span> <span class="hps">facilement</span> <span class="hps">un excédent de</span> <span class="hps">sodium,</span> <span class="hps">tant qu'il n'y</span> <span class="hps">a pas de</span> <span class="hps alt-edited">manque d'eau potable</span>. <span class="hps">La source la plus</span> <span class="hps">importante de</span> <span class="hps">sodium</span> <span class="hps">est le sel</span> <span class="hps">(NaCl</span>)<span>.</span></span></p>