PSL201Y1 Lecture Notes - Lecture 20: Adrenocorticotropic Hormone, Nicotine, Supraoptic Nucleus
Document Summary
Hypothalamus & limbic system controller & programmer of autonomic f"ns. Onuf, to prevent urination programming/driving urination process: antagonizing centres, one active at a time, signals sent up in spinoreticulothalamic info about bladder state, lots of info going to pontine level. & pag & higher up (ex. limbic in autonomic determines correct context for when turn on mitrition vs contincence) Homeostasis: definition: maintenance of a stable, internal body envt ( milieu int rieur", product of many specific physiological control circuits. (-)ve fdbk loops: hypothal = major coordinator of homeostatic control. Hypothalamus: interacts w brainstem motor & autonomic centers via axonal projections (usually by pag, interacts w endocrine system via pituitary body, can coordinate complete physiological response to challenges to internal envt can coordinate simultaneously in parallel systems. Pituitary body: provides an interface btwn cns & endocrine system, not used much, 2 modes to communicate w hypothal, 1) axonal projections into posterior pituitary: direct release of hormone from terminals into bloodstream.
