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BIO 669 QUIZ 2 QUESTIONS AND ANSWERS
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BIO 669 QUIZ 2 QUESTIONS AND ANSWERS
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BIO 669 QUIZ 2 QUESTIONS AND ANSWERSWhat Is a refectory period? - Answers -a period immediately following stimulation that is
unresponsive for some time.
Reduced sensitivity
What is myelin? - Answers -A segmented layer of lipid material, acts as insulation.
What is myelin called in the PNS? - Answers -Schwann cells
What are the nodes of Ranvier? - Answers -gaps/regular interruptions in the myelin
sheath
What is saltatory conduction? - Answers -The flow of ions between segments of myelin
rather than alone the entire length of the axon. Like playing leap frog.
What is divergence? - Answers -ability of branching axons to influence many neurons
What is convergence? - Answers -Branches of numerous neurons converging on one or
a few neurons
Central Nervous System (CNS) is made up of - Answers -brain and spinal cord
Peripheral Nervous System (PNS) is made up of - Answers -cranial nerves and spinal
nerves
Afferent pathways are_____ - Answers -ascending
Efferent pathways are _____ - Answers -descending
What does the somatic nervous system do? - Answers -motor and sensory pathways
that regulate voluntary motor control of the skeletal muscles
What does the autonomic nervous system do? - Answers -motor and sensory pathways
that regulate the bodies internal environment through involuntary control or organ
systems
What is Wallerian degeneration? - Answers -degeneration of a nerve fiber that has been
separated by an injury or disease
What is a synapse? - Answers -Gap between neurons
What is temporal summation? - Answers -time
What is spatial summation? - Answers -distance
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