BIO315H5 Lecture Notes - Lecture 15: Ligand-Gated Ion Channel, Exocytosis, Autocrine Signalling
Document Summary
All orga(cid:374)is(cid:373)s (cid:373)ust : detect signals in the environment, respond accordingly. Give some examples of cell signalling in unicellular organisms. Cells detect extracellular chemicals (by quorum sensing: system of stimuli and response correlated to population density) that. : regulate (cid:373)otilit(cid:455) towards a food source, awa(cid:455) fro(cid:373) predators/to(cid:454)i(cid:374)s, antibiotic production, spore formation, sexual conjugation etc. Give some examples of cell signalling in multicellular organisms: cells detect extracellular chemicals that control growth, division, differentiation during development etc, collaboration and coordination between cells/ tissues/organs. If we approach a red light, we stop (motor response) ***well-being of individual cell often set aside for benefit of organism. When things (cid:272)hange, a (cid:272)ell responds (cid:271)y : detecting signal molecules, processing information gathered, responding accordingly. Targets that lie and the end of signalling pathways are called effector proteins. The intracellular targets are altered in some way, like a change in cell behaviour. List the different modes of communication in cell signalling: contact dependent, paracrine, synaptic, endocrine.
