Chapter 25 The Nervous System

Chapter 25 The Nervous System - Term Definition The...

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Term: The development of the child's nervous system begins at about ____ weeks. Definition: 6 Term: In individuals who do not have neurological disease, intellectual performance tends to be maintained until at least age ____. Definition: 80 Term: Verbal skills are well maintained until age ____, after which some healthy elderly persons gradually develop a reduction in vocabulary, a tendency to make semantic errors, and abnormal pronunciation. Definition: 70 Term: With normal aging, the number of nerve cells in the brain _____. Definition: Decreases
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Term: A nerve fiber is a _____elongated process, usually an axon or peripheral process from a sensory neuron Definition: Single Term: A receptor is the point at which _____ of a nerve occurs. Definition: Stimulation Term: Receptors are typically _____ specific and they react by inniating a chemical change or impulse. Definition: Function Term: This portion of the nervous system _____ impulses from the entire body, requiring it to process information and respond with appropriate actions. Definition: Receives Term: Both the brain and the spinal cord are divided into gray matter and ____ matter. Definition: White
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Term: The gray matter consists of unsheathed cell bodies and true dendrites, whereas the white matter consists of the _______. Definition: Myelinated nerve fibers Term: The _____ is considered to be the largest mass of nervous tissue in the body. The male brain weighs just over
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