1a. Endocrine System

• 1. Endocrine System

  • instructs glands release hormones via bloodstream.
  • supplements work of NS.
  • psychological process.
• 2. Endocrine System


  Process:

  • hypothalamus, releasing hormone to pituitary gland.
  • pituitary gland, stimulating hormone into blood.
  • hormone signal target gland release hormone.
  • hormone levels rise in blood.
  • hypothalamus shuts down releasing hormone.
  • pituitary shuts down stimulating hormone.
  • target gland slows secretion.
  • stable concentration hormones in bloodstream.
• 3. Endocrine System

  Hypothalamus - controls release hormones from pituitary glands.
• 4. Endocrine System 


  Anterior Pituitary:

  • releases ACTH (stimulates adrenal cortex + release of adrenaline).

  Posterior Pituitary:

  • releases oxytocin (stimulates release prostaglandins, produces contractions/lactation).
• 5. Endocrine System


  Pineal Gland:

  • melatonin; regulate biological rhythms (sleep/wake cycle).

  
  

  Thyroid Gland:

  • thyroxine; regulates metabolism.
• 6. Endocrine System


  Adrenal Medulla:

  • adrenaline + noradrenaline.
  • adrenaline - high blood pressure, expand air passages, big pupils.
  • noradrenaline - release glucose, increase blood flow to muscles, etc.
• 7. Endocrine System


  Adrenal Cortex:

  • cortisol; regulates blood pressure, metabolism, stimulates glucose release for energy.
  • ’stress hormone’.
• 8. Endocrine System


  Ovaries:

  • oestrogen; menstrual cycle.

  Testes:

  • testosterone; male sex characteristics in puberty.