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Bio 669 Quiz 2 Questions And Answers With Verified Solutions Latest Updated 2024 Rated A+
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Bio 669 Quiz 2 Questions And Answers With Verified Solutions Latest Updated 2024 Rated A+
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Bio 669 Quiz 2 Questions And AnswersWith Verified Solutions Latest Updated
2024 Rated A+
Neuron is composed of - ANSWER✔✔ cell body, dendrites, axon
densely packed cell bodies in the CNS are called _____ - ANSWER✔✔ nuclei
densely packed cell bodies in the PNS are called _____ - ANSWER✔✔ Ganglia
What are dendrites? - ANSWER✔✔ Receptive portions of the neuron; receives
information
What do axons do? - ANSWER✔✔ Carry impulses away from the cell body
is membrane potential about the inside of the cell or the outside? - ANSWER✔✔
inside of the cell
what is an electrochemical gradient? - ANSWER✔✔ describes the forces affect on
ion movement if allowed to become permeable a membrane
when does action potential start? - ANSWER✔✔ when a membrane is depolarized
enough that it triggers voltage-gated ion channels
What is a graded potential? - ANSWER✔✔ changes in membrane potential that
decreases over distance
, what Is a refectory period? - ANSWER✔✔ a period immediately following
stimulation that is unresponsive for some time.
Reduced sensitivity
What is myelin? - ANSWER✔✔ A segmented layer of lipid material, acts as
insulation.
what is myelin called in the PNS? - ANSWER✔✔ Schwann cells
What are the nodes of Ranvier? - ANSWER✔✔ gaps/regular interruptions in the
myelin sheath
What is saltatory conduction? - ANSWER✔✔ The flow of ions between segments
of myelin rather than alone the entire length of the axon. Like playing leap frog.
What is divergence? - ANSWER✔✔ ability of branching axons to influence many
neurons
What is convergence? - ANSWER✔✔ Branches of numerous neurons converging
on one or a few neurons
Central Nervous System (CNS) is made up of - ANSWER✔✔ brain and spinal cord
Peripheral Nervous System (PNS) is made up of - ANSWER✔✔ cranial nerves and
spinal nerves
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