01:119:116 Lecture Notes - Lecture 13: Corpus Allatum, Thyroid, Anterior Pituitary

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

Document Summary

Endocrine system ii: organization of regulatory pathways, simple endocrine pathways, endocrine cells. Response to stimulus: hormone -> bloodstream -> come into contact with target cells (with specific receptor) -> brings about a physiological response, ex: ph in duodenum (1st part of s1) Stomach contacts - acidic: neutralized release of bicarbonate figure 45. 1, simple neuroendocrine pathway, stimulus received by sensory neuron stimulates neurosecretory cell -> neurohormone -> bloodstream -> target cell, ex) milk release during nursing. Figure 45. 11: feedback regulation, negative - response reduce stimulus, postive - reinforce stimulis. Larval stages -> molt: sheds old exoskeleton and secretes new one. 1: endocrine pathway, neurosecretory cells in brain -> ptth (neurohormone, ptth signals prothoracic gland -> ecdysteroid. Produce in bursts -> each triggers a successive molt. Also controls metamorphosis -> change in form closer to adult: jh - juvenile hormone figure 45. 12. Secreted by corpora allata (pair of endocrine glands) Actions: prevents metamorphosis, in presence of high jh.