Science study

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Science study
2012-11-13 07:24:20
science coordination

coordination and crap
Show Answers:

  1. What does the PNS and CNS contain?
    • The PNS contains nerve cells.
    • The CNS contains the brain and spinal chord.
  2. A nerve cell (neurone) consists of what and where?
     The axon, the nucleus, the dendrites, cell body, the myelin sheath, the node of ranvier, the schwann cell, axon terminal
  3. What is the function of axons and dendrites?
    • Axons: Structures of neurons that conduct electrical impluses away from the cell body.
    • Dendrites: Structures of neurons that conduct electrical impulses towards the cell body.
  4. What is the difference between sensory and motory neurons?
    • Sensory neurons form part of the body's larger sense organs, which function by collecting different energy forms. The sensory neuron then converts the energy into an electrical impulse.
    • The motor neurons transfer messages from the CNS to effector organs such as muscles.
  5. What is a neuro-transmitter?
    neuro-transmitters are special compounds that carries messages chemically to synapses which are in between neurons.
  6. Explain synapse.
    Synapses allow messages to be directed to the correct places. They are also known to playing an immportant part in learning and memory.
  7. What's a reflex arc?
    A minimum circuit between stimulus and response.
  8. What's the cerebellum?
    The pat of the brain below the back of the cerebrum. It regulates balance, posture, movement and muscle coordination.
  9. what's the corpus callosum?
    a large bundle of nerve fibers that connect the left and right cerebral hemispheres. In the lateral section, it looks a bit like a "C" on the side.
  10. What's the Frontal lobe of the Cerebellum?
    The top, front regions of each of the cerebral hemispheres. They are used for reasoning, emotions, judgement, and voluntary movement.
  11. What's the medulla oblongata?
    The lowest section of the brainstem (at the top of the spinal chord); it controls automatic functions including heartbeat, breathing, etc.
  12. what's the occipital lobe of the cerebrum?
    The region at the back of each cerebral hemisphere that contains the centers of vision and reading ability (located at the back of the head).
  13. what's the parietal lobe of the cerebrum?
    The middle lobe of each cerebral hemisphere between the frontal and occipital lobes; it contains important sensory centers
  14. What's the pituitary gland?
    It's the master gland attached to the base of the brain (located between the Pons and the Corpus Callosum) that secretes hormones.
  15. What are pons?
    THe part of the brainstem that joins the hemispheres of the cerebellum and connects the cerebrum with the cerebellum. It is located just above the Medulla Oblongata.
  16. What's the spinal chord?
    A thick bundle of nerve fibers that runs from the base of the brain to the hip area to the spine.
  17. Whats the temporarl lobe of the cerebrum?
    the region at the lower side of each cerebral hemisphere; contains centres of hearing and memory