PSL300H1 Lecture Notes - Lecture 1: Parathyroid Gland, Anterior Pituitary, Thyroid
Document Summary
Positive feedback (stimulus response response increases stimulus e. g. cervical stretch) Cervical stretch oxytocin from posterior pituitary more contraction (more stretch) Stimulus sensor/receptor afferent pathway integrating center efferent pathway target/effector response. Biological rhythms from changes in set-point changes integrating center"s signalling. Body temperature low in morning, high in the evening. 1o endocrine organ: produces hormones as primary function. 2o endocrine organ: has other primary function, but also produces hormones. Exocrine glands: release into duct/specific space (pancreas enzymes into pancreatic duct) Hormone in blood = endocrine production elimination (kidneys, liver ) Active hormone in blood = not bound to protein. In brain releases melatonin circadian rhythm, immune func. , antioxidant. Hypothalamus release or inhibit pituitary hormones with its trophic hormones inhibitory (dopamine & somatostatin trophic hormones downers: dopamine inhibits release of prolactin somatostatin inhibits release of growth hormone (gh) and thyroid-stimulating hormone (tsh) all other stimulatory.
