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Chapter 8 (The brain and spinal cord comprise the - central nervous system…
Chapter 8
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The part of the peripheral nervous system that brings information to the central nervous system is the - afferent division
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The cytoplasmic extensions that, together with the cell body, provide the main receptive surfaces for neurons are the- dendrites
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The myelin sheaths that surround the axons of some of the neurons in the CNS are formed by- oligodendrocytes
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The polarization of a nerve fiber refers to having the- potassium ions inside the cell and outside the cell
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When a neuron is at rest, which ion passes through its membrane most easily- potassium
The all-or-none principle states that- all stimuli principle states that- all stimuli great enough to bring the membrane to threshold will produce identical action potentials
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Which of the following lists the parts of a reflex arc in the correct order- receptor, sensory neuron, interneuron, motor neuron
Arriving, calcium ions enter, ACh diffuses,Sodium channels, ACh release, Depolarization ends, The synaptic knob
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What contains a delicate network of collagen and elastin fibers through which cerebrospinal fluid circulates- subarachnoid
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Axons crossing from one side of the spinal cord to the other within the gray matter are found in the- gray commissures
The white matter of the spinal cord contains- bundles of axons that share common origins, destinations, and functions
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4 cells CNS - Epidemal, microgelia, oliodendrocytes, astrocytes
PNS cells- Schawn, satilite