Coordination and response

• What is vasodilation

  • Sweat glands in the skin release more sweat. The sweat evaporates, transferring heat energy from the skin to the environment.

  Blood vessels leading to the skin capillaries become wider - they dilate - allowing more blood to flow through the skin, and more heat to be lost to the environment.
• what is vasoconstriction

  Skeletal muscles contract rapidly and we shiver. These contractions need energy from respiration, and some of this is released as heat. Blood vessels, which lead to the skin capillaries, become narrower - they constrict – which allows less blood to flow through the skin and conserve the core body temperature. This is called vasoconstriction
• where does adrenaline come from

  the adrenal glands
• what does adrenaline do

  It is produced in times of stress.it targets the vital organs
• Where is insulin produced

  Pancreas
• what does insulin do

  lowers blood glucose levels
• what is produced from the pituitary gland

  • adh
  • Fsh
  • LH
• adh

  controls how much water the kidneys reabsorb
• FSH

  stimulates follicle to develop
• LH

  stimulates an egg to be released
• testoserone

  produced in the testes

  controls male secondary sexual characteristics
• ovaries produce

  oestrogen

  progesterone
• oestrogen

  stimulates growth and repairs uterus lining

  controls female secondary sex charateristics