PSYC 370 Lecture Notes - Lecture 16: Supraoptic Nucleus, Posterior Pituitary, Exocrine Gland

• School: Queen's University
• Department: Psychology
• Course: PSYC 370
• Professor: Janet L Menard

Document Summary

The exocrine glands secrete chemicals via ducts into digestive tracts or outside of the body the exocrine gland is not part of the endocrine system. The endocrine glands secrete hormones that are taken up by the circulatory system and transmitted in other areas of the body. Hormones bind to receptors on target cells that are often distal to the endocrine cells that release the hormone. The three classes of hormones include = amino acid derivatives, peptides and proteins, and steroids. There is a posterior and anterior portion of the pituitary. The posterior part is derived from hypothalamic tissue the anterior pituitary is derived from embryonic tissue that will develop into the roof of the mouth. Posterior pituitary: there are neurosecretory cells in the pvn which is the paraventricular nucleus and supraoptic nucleus --- these secrete hormones into the posterior pituitary where they enter general circulation. Oxytocin: stimulates uterine contractions and milk ejection.