brain power

• What does "M.R.S.N.E.R.G." stand for?

  Movement

  Respiration

  Sensitivity

  Nutrition

  Excretion

  Reproduction

  Growth
• What is a stimulus


  A change in the environment
• What are receptors?


  Special cells that pick up stimulus
• What is a coordinator ?


  your Brain and spinal cord that acts as the coordinator
• What are effectors?


  Structures that produce the response
• What are nerves ?

  Conduct messages from receptors to coordinator and from coordinator to effectors
• What is the white of your eye

  The sclera
• What is the cornea

  The front part of the eyeball wich is translarent to let light in
• What is behind the cornea

  The iris, it is the coloured part of your eye
• What is the hole in the middle of the iris called

  The pupil
• What do the muscles in the iris allow you to do

  Control the size of your pupil
• Why is it helpful that your pupils change size in different light conditions

  In the dark , the light is so dim that you Can't See property By widening ( dilating ) the pupil as much light as possible enters the eye . Too much bright light could dazzle or even damage the retena By making the pupil Smaller ( constricting ) less light enters the eye
• What holds the lens in place

  Ligaments attached to a ring of muscle
• What is the blind spot


  The point where the optic nerve leaves the retina
• What is the problem and correction when being short sighted

  Eyeball is too long so image is focused in front of retina

  Short sightedness is corrected by wearing lenses which spread the light rays out before entering the eye
• What is the problem and correction with being long sighted

  Eyeball is too short so image is focused behind the retina

  Corrected by wearing lenses which start to bend the light rays inwards before entering the eye
• Other than coordination what functions are controlled by the brain

  Memory

  Intelligence

  Personality

  Emotions

  Appreciation of music, arts etc
• What is the largest part of the brain

  cerebrum
• What haooens in the cerebrum

  This is where sense information feeds into the brain and decisions are made . It is also where your memories are stored
• What does the cerebellum do

  It controls balance and the coordination of movement
• What is another name for your brain stem


  Medulla
• What does your brain stem do

  breathing and heart rate are controlled
• what are skeletons main function

  Support

  Protection

  Movement

  Make blood cells
• how many bones are in adult skeleton

  206
• what 3 things are needed for healthy bones

  Calcium

  Vitiman d

  Excersise
• what are the muscles attached to your skeleton?

  Skeletal muscles
• what happens when arm bends

  Triceps relax

  Biceps contract
• what happens when arm straightens

  Triceps contract

  Biceps relax
• What do you call muscles with opposite effects


  Antagonistic
• What 4 things are needed for a response to occur

  receptors coordinator effectors nerves
• define skeleton support


  skeleton supports the body (helps it stand)
• define skeleton protection


  bones protect organs
• what protects the brain

  skull
• what protects the heart and lungs

  rib cage
• what protects the spinal cord

  backbone
• define skeleton making blood cells

  red and white blood cells are made in bone marrow
• what is bone marrow


  soft tissue in bones
• what protects bone marrow


  hard part of bone surrounding it