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Nervous System

QuestionAnswer
Name in order the 3 parts to a neuron 1. dendrite 2. cell body 3. axon
Name one role of myelin increases the speed of nerve transmission OR insulates the axon
State the part of a nerve that myelin wraps round. axon
Under two's have less co ordinated movements as their nerves are unmyelinated
Name the substance that produces myelin. Glial cells.
Name another role of glial cells apart from producing myelin Supports neuron chemically
Name the 2 parts to the CNS brain and spinal cord
Name the band of fibres that transfers information between the two hemispheres corpus callosum
The left eye takes information to which brain hemisphere right hemisphere
Which eye is unaffected in split brain studies and can take information up to the left hemisphere so it can be spoken right eye
Name one role of the corpus callosum 1. sensory area 2. motor area 3. personality 4. memory 5. speech 6. hearing
Name one role of the medulla controls heart rate/breathing/digestive system via ANS,
Name the 2 forms of the PNS 1. somatic nervous system 2. autonomic nervous system
Which nervous system controls skeletal muscle somatic nervous system
Which nervous system controls smooth muscle autonomic nervous system
Which type of PNS is under voluntary control somatic nervous system
Describe a sensory nerve. Takes information from sense organ/receptors to inter nerve,
Describe a motor nerve Takes information from inter nerve to muscle.
Which type of pathway is converging sensory
Which type of pathway is diverging motor
Describe what is meant by a converging pathway When several nerves come to 1 nerve
Explain the advantage of sensory nerves in rod vision being converging summation of weak stimuli causes the threshold to be reached. at low light
Explain the importance of motor pathways being diverging. Allows for fine motor control
When nerves later in the pathway connect to nerves earlier in the pathway sending the impulse back through the pathway Reverberating pathway
Name the types of nerves making up the ANS sympathetic and parasympathetic
State the effect of sympathetic nerves on heart rate and breathing rate increases
State the effect of the sympathetic nerves on digestive enzymes and peristalsis decreases
State the term for the opposing actions of the sympathetic and parasympathetic nervous system antagonistic
State the neurotransmitters produced by sympathetic and parasympathetic nerves sympathetic - noradrenaline parasympathetic - acetylcholine
Which type of nerves takes information in to the inter nerves in the brain. 1. sensory 2. motor sensory nerves
Created by: brightminds
 

 



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