PSL300H1 Lecture Notes - Lecture 31: Arcuate Nucleus, Supraoptic Nucleus, Anterior Pituitary
Document Summary
The ans is a high player here to balance each other. They rarely occur in isolation - changes in envir needs ans responses. Product of many physiological control circuits (neg feedback loops) Sensors everywhere in the body - they feedback into the hypothalamus. Hypothalamus is major regulator of core parameters such as plasma glucose, osmolarity, temperature; hypothalamus is major coordinator of homeostatic control. Everything stays constant, despite any change you throw at it. Sensors located within hypothalamus to detect changes in these parameters. Can rely on other information from other systems and sensory areas too. Corrective actions initiated involving autonomic, endocrine, and somatomotor mechanisms. Interacts with brainstorm motor and autonomic centers via axonal projections. Thus: can coordinate complete physiological resp to challenges in internal environment. Reticular formation (inputs from spinal cord - posture, etc) Releasing hormone intermediary like crh, carried via portal system. Plasma osmolality + sexual response (not asked for in exam)
