Topic 7

• Homeostasis 


  Constant maintenance of internal conditions to maintain optimal conditions for cellular reactions
• Thyroxine produced in thyroid gland
• Insulin and glucagon produced in the pancreas (behind stomach)
• barrier advantage : no side effects, protects from sexually transmitted infections
• hormone contraception's advantage : don't need to worry while having sex, more effective to prevent pregnancy
• FSH causes follicle to mature and stimulates oestrogen
• Oestrogen causes uterus lining to build up, inhibits FSH and stimulates LH,
• LH causes ovulation
• Progesterone is produced in the corpus luteum, maintains uterus lining and inhibits FSH and LH
• FSH and LH produced in the pituitary gland
• Oestrogen produced in the follicle or ovaries
• Type 1 is when pancreas doesn’t produce enough insulin
• Type 2 is when the cells stop responding to insulin
• Glucagon is produced (glucose low) and causes liver to break down glycogen into glucose
• If not enough glucose blood cells lyse (explode)
• cells crenate (shrivel) if too much glucose
• Adrenalin increases heart rate and breathing rate
• Negative feedback is the form of control where change in a condition causes the opposite change to happen
• Kidney is part of urinary system and helps with Osmoregulation
• Nephrons is the filtration unit
• In the Proximal convoluted tubule reabsorption of useful substances takes place
• Water is low in the blood then ADH is secreted and collecting duct is more permeable
• Ovulation is the release of an egg from the ovary