01:119:116 Lecture Notes - Lecture 13: Somatostatin, Aldosterone, Secretion

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:116
• Professor: Gregory Transue

Document Summary

Ptth: prothoracic hormone: (cid:494)tell prothoracic gland to make ecdysteroid(cid:495) Lecture 13: control of hormone secretion, simple endocrine pathways. Endocrine cells respond directly to stimulus: simple neuroendocrine pathways. Stimulus received by sensory nerve first: feedback regulation. Invertebrate endocrine control: molting (ecdysis in arthropods) Prothoracic gland makes ecdysteroid: endocrine pathway: ptth & jh. After hatching: caterpillar increase levels of jh, no ptth, no ecdysteroid. Stimulus = inside of insect is pushing on exoskeleton. Vertebrate endocrine control: hypothalamus: intro and modes of action. 2 modes of action: releasing hormones (rh); inhibiting hormones (ih) Sent via pituitary portal vein to specific cells within anterior pituitary: produces adh and oxytocin stored in axon terminals of posterior pituitary. Tropic hormone cascade pathway: stimulated by signals to brain, hypothalamus secretes a releasing hormone (rh, anterior pituitary secretes or stimulating hormone (sh) Stores and secretes hormones produced in hypothalamus: adh (vasopressin): acts on kidney; water conservation/homeostasis, oxytocin: milk, contractions, care, bonding.