So this is a process that we call signal transduction. What happens during signal transduction is an extracellular signal molecule, so this is our ligand, binds to our membrane receptor, and these …

Transduction In transduction, viruses that infect bacteria move short pieces of chromosomal DNA from one bacterium to another "by accident." Yep, even bacteria can get a virus! The viruses that infect …

If you’re nervous before a test or competition, your adrenal gland is likely to be pumping out epinephrine. When epinephrine binds to its receptor on a muscle cell (a type of G protein-coupled receptor), it …

Learn how signals are relayed inside a cell starting from the cell membrane receptor. The chains of molecules that relay intracellular signals are known as intracellular signal transduction pathways.

Types of signaling molecules and the receptors they bind to on target cells. Intracellular receptors, ligand-gated ion channels, G protein-coupled receptors, and receptor tyrosine kinases.

Learn about the cell cycle and its role in growth, development, and reproduction through free resources on Khan Academy.

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.

How the nucleotide sequence of an mRNA is translated into the amino acid sequence of a polypeptide (protein).

Explore how alterations in signal transduction pathways affect cellular communication. Understand the role of G protein-coupled receptors in initiating responses.

Unit 4: Cell communication and cell cycle Unit mastery: 0% Cell communication Signal transduction Changes in signal transduction pathways Feedback Cell cycle Regulation of cell cycle