Hormones + Nervous system

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Created by
PunPun

Cards (14)

  • Menstration cycle
    1. FSH stimulates follicle/matures egg
    2. FSH stimulates oestrogen production
    3. Oestrogen, grows and repairs uterus lining, inhibits FSH production
    4. Oestrogen peaks: stimulates LH production
    5. LH triggers release of egg for ovary, stimulates progesterone
    6. Progesterone maintains uterus lining, inhibits FSH & LH production
  • Insulin
    1. Causes liver to convert glucose to glycogen
    2. When glucose concentration in blood is too high
    3. Decreasing blood glucose levels
  • Adrenaline 

    Effects: Increases heart rate & blood sugar level; activates fight or flight
    From: Adrenal gland
  • ADH 

    Effect: Makes collecting duct walls more permeable for water absorbtiom
    From: Pituitary gland
  • Progesterone 

    Effect: Maintains/thickens uterus lining
    From: Ovary
  • Oestrogen 

    Effect: Develops female characteristics, grows/repairs uterus lining
    From: Ovary
  • Hormone vs Nervous
    1. Speed: Hormone = slow, Nervous = Fast
    2. Transport: Hormone = Bloodstream, Nervous = Nerones
    3. From: Hormone = Gland, Nervous = CNS, spinal chord
    4. Effectors: Hormone = Cell in specific tissue, Nervous = Target muscle
  • Withdrawl from hot object:
    1. Receptor (Finger) senses hot object
    2. Sensory neruone send impules from finger to CNS/Spinal chord
    3. Relay neruone sends information via neurotransmitters through synapse into motor neruone
    4. Motor neruone sends electrical impulses to target muscle
  • Neurotransmitter + Synapse
    1. Electrical impulses reaches axon terminal
    2. Neurotransmitters released, diffuse across synapse
    3. Electrical impulses generated at dendrite of next neurone
  • Vasoconstriction: Warm up/Cold enviroment
    1. Blood vessels constrict/contract
    2. Less blood flows near surface of skin
    3. Prevents heat loss
  • Vasodilation: Cool down/Hot environment
    1. Blood vessles dilate
    2. More blood flows to surface of skin
    3. Increases heatloss
  • Near objects
    1. Cilliary muscles contracts
    2. Suspensory ligaments relax
    3. Lens become concave and flat
    4. More light refracted
  • Far objects
    1. Cilliary muscles relax
    2. Suspensory ligaments tighten
    3. Lens become thin
    4. Less light is refracted
  • Dim room 

    1.Circular muscles relax
    2. Radial muscles contract
    3. Pupils dilates more light enters