Anatomy and Cell Biology 4451F/G Lecture Notes - Lecture 16: Adrenocorticotropic Hormone, Periventricular Nucleus, Capillary

• School: Western University
• Department: Anatomy and Cell Biology
• Course: Anatomy and Cell Biology 4451F/G
• Professor: Suzanne Schmid

Document Summary

External (change in level of threat we are exposed to, change in temperature) and internal (blood sugar) things that effect homeostasis of body. Compensate for these changes to make sure body optimal. Cut through coronal plane the periventricular nucleus dorsal hypothalamic area, dorsal medial see same nuclei but also see there is a region right along the third ventricle called perivenetricular nucleus. Syn and parasyn: relation of hypothalamus with pituitary gland. Parvicellular (palvocellular) and magnocellular located ifferent areas of hypothalamus. Magno = axons project through pituitary stalk (infundibulum) to posterior pituitary where they directly release hormones in bloodstream. Magnocellular neurosecretory cells that project to posterior lobe and directly release hormones in capillary bed in posterior pituitary. Mainly in paraventricular and supraoptic nuclei -- where cell bodies sit synthesize and secrete vasopressin (controls water balance in body) and oxytocin (lactation and social behavior) Hpa axis (hypothalamic, pituitary and adrenal) stress. Periventricular important for where neurosecretory hormones located.