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Nervous System

QuestionAnswer
What line across the brain splits the brain into two latitudinal halves? Central Suculus
What is the motor region of the brain called? Pre-central gyrus
What part of the brain is responsible for sensory signals? Post-central gyrus
What is the function of the corpus callosum? Connects the two hemispheres of the brain
What is the cerebellum responsible for? Nerve reflexes and autonomic nervous system
What is the function of the basal bodies? Involved in co-ordinated activities
What is the function of the thalamus? Receive sensory signals from the skin, and re-distributes to the cerebrum
What covers then spinal cord? Meninges
What is the inner layer of the meninges? Pia mater
What is the middle layer of the meninges? Arachnoid mater
What is the outer layer of the meninges? Dura mater
What do Schwann cells do? Provide myelin in the PNS
What do oligodendrocytes do? Provide myelin in the CNS
What do ependymal cells do? Line the CSF filled ventricles
What are the collective name for; Schwann cells, oligodendrocytes, ependymal cells, & astrocytes? Neuroglia
What is the resting potential of the membrane? -70mV
What is the threshold membrane potential for an action potential? -55mV
What happens at -55mV? Voltage gated sodium channels open, and Na+ ions rush into the cell (depolarisation)
What happens at +30mV? Voltage gated Na+ channels close, and voltage gated K+ channels open, as K+ rush out of the cell (repolarisation)
What happens to restore membrane potential after hyperpolarisation? Na+/K+ pump drags in 2 K+ ions, and pumps out 3Na+ ions, making outside more positive than inside
The cells bodies of sensory neurons whose fibres enter the cord are found in the ___. Dorsal root ganglion
What constitutes the CNS? Brain and the spinal cord
The deep groove that separates the two hemispheres of the cerebrum is called the ______. Longitudinal fissure
Created by: Jake_Bark
 

 



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