Apologia general science module 16

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  1. autonomic nervous system
    the system of nerves which carries instructions from the CNS to the body's smooth muscles, cardiac muscle and glands
  2. sensory  nervous system
    the system of nerves which carries information from the body's receptors to the CNS
  3. motor nervous system
    the system of nerves which carries instructions from CNS to the skeletal muscles
  4. what are the two main types of cells in the human nervous system
    neurons and neuroglias
  5. what do dendrites do
    conduct electrical signals towards the cell body
  6. what do axons do
    direct signals away from the cell body
  7. what is a synapse
    the gap between the axon of a neuron and the receiving end of another cell
  8. explain how a signal crosses from the axon of a neuron to the receiving cell
    when the signal reaches the end of the axon a neurtransmitter is realesed and travels across the synapse.  Once they reach the receiving cell, they create a new electrical signal.
  9. what is the function of neuroglia
    support the neurons and help communicate with one another
  10. a nerve runs down a leg carring signals to the foot is it part of the PNS or the CNS
  11. what two main structures make up the CNS
    brain and spinal chord
  12. what two things protect the barian
    skull and cerebrospinal
  13. what protects the spinal chord
    vertebral column
  14. what is the brains gray matter composed of
    cell bodies 0f neurons
  15. what is the brains white matter composed of
    axons of the neurons in the gray matter
  16. what is the function of the corpus callosum
    allows the two hemisheres of the brain to exchange information
  17. what does the cerebellum primarily control
    voluntary muscles
  18. what part of the brain deals mostly with the higher level thinking skills
  19. do the two sides of the brain do exacly the same things
    no  *The left side of the cerebrum  tends to be responsible for speaking, logic, and math. The right side is more involved in spatial relationships, recognition, and music.
  20. what side of the PNS does the left side of the brain control
    the right side
  21. what is the blood barrier and why is it important
    the blood barrier is brain capillaries that are different from other capilllaries. the reason it is so important is beacause it stops harmful chemicals from entering the brain
  22. what does the sympathetic diversion of the autonomic nervous system do
    increases the rate and strength of the heartbeat and raises blood pressure * It also stimulates the liver to release more glucose in the blood, producing quick energy for the "fight or flight" response that we experience when we are frightened or angry.
  23. what are the four basic tastes we can detect
  24. what does the parasymphetic division of the autonomic nervous system do
    slows the heart rate and lowers the blood pressure *It also takes care of certain "housekeeping" activities such as causing the stomach to churn while it is digesting a meal.
  25. What portion of the tounge is least sensitive to taste. why is it so insesitive
    the bitter portion (which is the center of the tongue) is the least sensitive . beacuse there are not much taste buds around that area
  26. when we smell something what are we actually detecting
    chemicals in the air
  27. what is the function of the eyes pupil
    regulates the amount of light that gets into the eye
  28. what is the functions of the eyes lens
    to focus the light onto the retina
  29. what is the function of the eye's ciliary muscle
    changes the shape of the lens so it can focus on objects
  30. what cells of the retina detect light
    rod and cones
  31. What causes an eyes blind spot
    when the optic nerves enter the eye where there are no rods or cones on the retina
  32. which part of the body feels more touch the arm or the fingers
    X  fingers
  33. what is the function of an ear drum
    the vibrations of the ear drum causes the ossichles to move back and fourth and also vibrates the cochlea
  34. what is the function of the cochlea
    makes its hair cells vibrate which sends a signal to the auditory nerve to the brain and the brain interpertes that as sound
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Apologia general science module 16
2014-05-08 20:17:42

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