HUBS 191 Progress Test II Revision Exam Questions And All Correct Answers.
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Course
HUBS 191
Institution
HUBS 191
Nervous system cells - Answer neurons and glia
Neuron input zone - Answer dendrites and cell body
Neuron summation zone - Answer axon hillock
Neuron conduction zone - Answer axon
Neuron output zone - Answer axon terminals
Axon hillock - Answer decides whether to pas...
Nodes of Ranvier - Answer gaps in the myelin sheath to increase transmission
Somatic efferent pathway - Answer 2 neurons: upper motor neuron from brain to spinal cord, lower
motor neuron from spinal cord to effector muscle; NT = ACh
Autonomic efferent pathway - Answer 3 neurons: 1st neuron entirely in CNS; 2nd neuron from CNS to
PNS, myelinated, preganglionic (NT = ACh); 3rd neuron entirely in PNS, unmyelinated, postganglionic (NT
= ACh or NE)
-Na+ channels inactivate while K+ channels activate
-K+ channels inactivate
-Repolarisation
-Absolute refractory period
-Relative refractory period -40mV
Propagation with unmyelinated axons - Answer segmented depolarisation and repolarisation
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