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Résumé examen plus cours de système nerveux
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examen plus cours de système nerveux
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1, Unité 2 : Les fonctions de relation
Et L’immunoLogie
Chapitre1 : Le système nerveux
Introduction :
Notre organisme reçoit en permanence différents signaux de
l’environnement. Il les interprète et les transforme en sensation lui
permettant d’éviter les dangers et de réagir d’une façon la plus
adéquate grâce à l’intervention du système nerveux.
Problèmes à résoudre :
Comment notre organisme capte-il- les informations
issues de notre environnement ?
Quelles sont les structures qui interviennent dans la
sensibilité consciente, la motricité volontaire et la
motricité involontaire ?
Comment peut-on préserver la santé de notre système
nerveux ?
I. La sensibilité consciente:
1. Les récepteurs sensoriels :
Les organes de sens (yeux, oreilles, nez, la langue et la peau) possèdent des
récepteurs spécialisés (récepteurs sensoriels) qui transforment
l'information à laquelle ils sont sensibles (lumière, son, odeur, goût,
température, pression…) en message nerveux
2
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