BIOSC 150 1nd Edition Lecture 13 Outline of Last Lecture I Subcellular structures continued II Lysosomes III Exploring the Smooth ER Outline of Current Lecture 1 Subcellular structures continued 2 Signals Current Lecture Signals carry info that changes cell behavior Transduction pathways are necessary Cells must have the right receptor to bind Ligand is to signal Signals can cross membranes bind to intracellular receptors Signal bound intracellular receptors directly elicit a response Signal amplification occurs at the level of transcription Many breast cancers are estrogen responsive Signals that cant cross the membrane bind to receptors Extracellular signals are transduced to intracellular signals G proteins couple receptors G proteins bind to GTP G proteins transduce Transmembrane receptors can be enzyme These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute
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