Topic Two

• Pineal gland releases melatonin
• pituitary extends close to the mouth and receives imput from SCSN
• Arcuate nucleus produces hypothalamic releasing factors
• Pituitary is highly vascularized which allows quick release of hormones
• hormones travel travel through the portal vessels to the anterior pituitary
• Corticotropin (ACTH) is deried from basophil cells
• Thyrotropin (TSH) is dervied from basophil cells
• Follitropin (FSH) and Lutropin (LH) are both derived from basophil cells
• Prolactin (PRL) is derived from acidophil cells
• Growth hormone (GH) is derived from acidophil cells
• Non-tropic hormones

  1. prolactin
  2. MSH
• Tropic hormones

  1. FSH
  2. LH
  3. TSH
  4. ACTH
• Tropic and Non-tropic

  1. GH
• Tropic hormones stimulate growth by hypertrophy or hyperplaysia
• non tropic hormones do not lead to cell growth
• TRH monitors metabolism
• Peptides are made in advanced and stored in vesicles
• steroids are all made on demand
• Pleiotropic affects many different traits
• non-pleiotropic control only one trait
• Growth Hormone

  1. comes from anterior pituitary
  2. is a peptide hormone
  3. GHRH is stimulatory
  4. GHIH is inhibitory
• Prolactin

  1. comes from anterior pituitary
  2. is a peptide hormone
  3. PRH is stimulatory
  4. Dopamine is inhibitory
• Thyroid Hormone System

  1. comes from anterior pituitary
  2. is a glycoprotein
  3. TRH is stimulatory
  4. No specific inhibitory signal
• ACTH

  1. comes from anterior pituitary
  2. is a peptide hormone
  3. CRH/CRH is stimulatory
  4. no specific inhibitory factor
• Oxytocin

  1. comes from posterior pituitary
  2. is a small peptide hormone
• Antidiuretic Hormone

  1. comes from posterior pituitary
  2. is a peptide hormone
  3. no regulatory hormones
• vassopressin is a highly reserved peptide