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Échanges gazeux (42)

Examen 2

QuestionAnswer
Pourquoi le poumon gauche est-il plus petit que le poumon droit? Car la partie gauche du coeur est plus volumineuse.
Quelles sont les trois caractéristiques des surfaces respiratoires? Minces, étendues et humides.
Qu'est-ce-que le surfactan? Couche protectrice qui permet aux alvéoles de ne pas s'écraser en empêchant les molécules d'eau de réagir ensemble.
Quelles sont deux caractéristiques importantes d'un système ? Une surface étendue et un renouvellement de l'eau.
Le système à contre-courant des poissons est-il efficace ou pas? Oui
Quelles sont les limites du système respiratoire trachéen des insectes? La taille et il faut être un animal à sang froid.
Le diaphragme est-il relâché ou contracté durant l'expiration. Relâché
Quel est le désavantage du système respiratoire chez l'humain? Il est impossible de vider complètement les poumons. Il y a donc toujours un mélange d'air oxydé et résiduel.
Quel est l'animal qui a le meilleur système respiratoire? L'oiseau
Quels sont les principaux signaux qui permettent aux capteurs de réguler la respiration? Principalement la diminution du pH, et l'aug. de CO2. Un peu la diminution d'O2.
Created by: 1553656660
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