Homeostasis & Hormones

• Where is insulin produced?

  pancreas

  
• Where is progesterone produced?

  ovaries

  
• Where is oestrogen produced?

  ovaries

  
• Where are growth hormones produced?

  thyroid gland

  
• Where is adrenaline produced?

  adrenal glands

  
• Where is testosterone produced?

  testicles and adrenal glands

  
• Where is thyroxine produced?

  thyroid gland

  
• What does FSH do?

  Causes egg to mature and stimulates ovaries to produce oestrogen

  
• Where is FSH produced?

  pituitary gland

  
• What does oestrogen do?

  Oestrogen increases the thickness of the womb. It also causes a spike in LH and inhibits the release of FSH.

  
• Where is oestrogen produced?

  ovaries

  
• What does LH do?


  stimulates ovulation

  
• Where is LH produced?

  pituitary gland

  
• What does progesterone do?


  Maintains lining of uterus

  
• Where is progesterone produced?

  ovaries
• What hormones are used in IVF?

  FSH and LH
• What hormones are used in contraception?

  oestrogen and progesterone
• What does thyroxine do?

  Regulates metabolism, heart rate and temperature

  
• Where is thyroxine produced?

  Thyroid gland - neck

  
• What does adrenaline do?

  It increases the heart rate, boosting the delivery of oxygen and glucose to the brain and muscles

  
• Where is adrenaline released from?

  adrenal glands

  
• What is homeostatis?


  The regulation of the conditions in our body maintaining stable internal environment
• What does it do?

  Responds to any change in internal or external conditions
• What are the 3 main components in automatic control systems?

  Receptors, coordination centres and effectors
• What is a stimulus?

  A change in your environment than requires a response
• Give some examples of stimuli?

  Light, sound, touch, pressure, pain, chemical or temperature
• What do the receptors do?

  Detect the stimulus when either temp or water is high or low
• What happens after the receptors?

  Receptors send messages to the cns which organise a response to the effector
• Give examples of the central nervous system?

  The brain or spinal cord
• How is the CNS connected to the rest of the body?

  Through sensory and motor neurones

  
• What is an effector?

  Muscles or glands that bring about a response
• What do the muscles and glands do in response?

  Muscles contract and glands secrete chemical substances(hormones)
• What is a sensory neurone?

  Neurones that carry information from the receptors to the cns
• What is a relay neurone?

  Neurones that carry impulses from the sensory to the motor neurones
• What is a motor neurone?

  Neurones that carry information from the cns to the effectors
• What is the nervous system?


  It is what allows you to react to your surroundings
• What is a synapse?

  It is the nerve signal being transferred by chemicals which move across the gap, sending a electrical signal to the next neurone
• What is a reflex arc?

  The passage of the information, that brings around a response

  
• Responses that reduce body temp-

  Hairs lie flat, sweat and blood vessels get wider(vasodilation)
• Responses that increase body temp-

  Hairs stand up, no sweat, shivering and blood vessels constrict(vasoconstriction)