BIOL 1201 : Final Exam Review Session
Document Summary
11. 16: where are the receptors involved in cell signaling located, may involve a receptor in the plasma membrane, an integral membrane protein, fig. 11. 6: may involve an intracellular receptor (inside cell; cytoplasm, e. g. , steroid hormone receptors, fig. Cell signaling: activated g protein subunits: interact with their target enzymes or ion channels. Viii: turned off when an intrinsic gtpase activity of the alpha subunit hydrolyzes gtp to gdp. Cell signaling: inactivating g proteins: alpha gdp and the betagamma dimer reassociate. Cell signaling: g protein coupled signaling: membrane receptor is activated by an extracellular signal, g protein transfers the extracellular signal into the intracellular compartment by interacting with a target, target enzyme produces and intracellular second messenger. Moodle questions on cell signaling: moodle questions on the ocean. 45. 17: what is the endocrine system, regulatory system that maintains homeostasis through hormones, consists of hormones and the glands (endocrine glands=ductless glands) which secrete them, fig.