Khan Academy
WEBIf you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
AI for Teachers - Khan Academy
WEBIf you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
Cell-cell junctions | Gap junctions (article) | Khan Academy
WEBOverview of cell signaling. Introduction to cell signaling. Cell-cell signaling in unicellular organisms. Intro to the endocrine system. Cell-cell junctions. Cell communication. Science>. AP®︎/College Biology>. Cell communication and cell cycle>.
Khan Academy
WEBKhan Academy
Khan Academy
WEBSignal transduction is a complex process where cells communicate through chemical signals. This involves a ligand binding to a receptor, initiating a cascade of events that can alter cell behavior. The Map kinase pathway, crucial in cell differentiation and replication, is a key player in this process.
Khan Academy
WEBThe webpage provides an overview of cell signaling mechanisms.
可汗学院 - Khan Academy
WEB激素主要有三种类别. 1）蛋白激素（或多肽激素）由氨基酸链组成.比如用来降血糖的ADH（抗利尿激素）. 2）源于血脂的类固醇激素.睾丸激素等生殖激素,雌激素等类固醇激素.3）源自氨基酸的胺类激素.肾上腺素是胺类激素的一种,用于做出战斗还是逃跑的决策.
Khan Academy
WEBCe chapitre fait partie des ressources en biologie. Parcourez les vidéos, articles et exercices par sujet.
可汗学院 - Khan Academy
WEB如果你看到这则信息,这表示下载可汗学院的外部资源时遇到困难. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
Khan Academy
WEBLição 1: Como as células sinalizam umas às outras. Resumo da sinalização celular. Introdução à sinalização celular. Exemplo de uma via de transdução de sinal. Ligantes e receptores. Caminhos de retransmissão de sinais. Resposta a um sinal. Sinalização celular.