Khan Academy
网页If 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.
Khan Academy
网页G-protein coupled receptors (GPCRs) are a large, diverse group of membrane receptors in eukaryotes that respond to a wide range of external signals. When a ligand binds to a GPCR, it triggers a complex chain of events involving G-proteins and second messengers, influencing various cell functions. This process is key to many bodily functions, from …
The phototransduction cascade - Khan Academy
网页The phototransduction cascade is a process where light entering the eye triggers a molecular reaction. This reaction involves the rod cells in the retina, which convert light into neural impulses. Key players include proteins like rhodopsin and molecules like retinal, which change shape when hit by light. This sets off a chain of events, ultimately leading …
AI for Teachers - Khan Academy
网页If 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.
Khan Academy
网页Learn about the mechanisms of cell signaling in this Khan Academy biology lesson.
Response to a signal (article) - Khan Academy
网页Signals (a.k.a. ligands) and receptors come in many varieties, and binding can trigger a wide range of signal relay cascades inside the cell, from short and simple to long and complex. Despite these differences, signaling pathways share a common goal: to produce some kind of cellular response.
Khan Academy
网页Cooper, G.M. (2000). Pathways of intracellular signal transduction. In The cell: A molecular approach (2nd ed.). Sunderland, MA: Sinauer Associates. Źródło: http://www.ncbi.nlm.nih.gov/books/NBK9870/.
Activation and inhibition of signal transduction pathways - Khan …
网页The cholera toxin triggers a signal transduction pathway. This process starts when molecules outside the cell interact with cell receptors, setting off a chain of events. G-proteins, acting like molecular switches, play a key role here.
可汗学院 - Khan Academy
网页磷酸化例子：MAPK信号传递通路. 为了更好的理解磷酸化是怎么进行的，让我们研究一个真实生活中使用此技术的信号传递通路的例子：成长激素信号传递。. 具体地说，我们会看表皮生长因子（EGF）在一系列激酶种起作用，来产生一个细胞反应的一部分。. 这个图 ...
Khan Academy
网页Khan Academy