PHGY 214 Lecture Notes - Lecture 2: Posterior Pituitary, Anterior Pituitary, Myoepithelial Cell

• School: Queen's University
• Department: Physiology
• Course: PHGY 214
• Professor: Ken Rose

Document Summary

List hypothalamic releasing hormones and pituitary hormones they regulate. Understand endocrine negative feedback and how it is applied to differentiating between primary and secondary endocrine pathologies. Neurons from hypothalamus innervate posterior pituitary more than anterior pituitary: 2 hormones secreted by posterior pituitary are not made in there vs. anterior pituitary secretes hormones it makes. Anterior pituitary is composed of glandular epithelial tissue andenohypophysis. Posterior pituitary composed of nervous tissue neurohypophysis. Anterior and posterior glands release of hormones from both pituitary controlled by hypothalamus. Direct innervation by hypothalamus in posterior pituitary allow for direct secretion into blood: secretions: oxytocin and vasopressin. Vasopressin: controls nephrons of kidney and arterioles throughout body, nephrons: increases permeability of distal and collecting duct for water, vasopressin: causes vasoconstriction of arterioles. Difference from prolactin from anterior pituitary due to prolactin causing milk synthesis vs. oxytocin causing milk secretion: example.