NU 545 CH 15 EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++ LATEST UPDATE

NU 545 CH 15 EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++ LATEST UPDATE CNS and PNS two divisions of the nervous sytem brain and spinal cord what makes up the central nervous system cranial and spinal nerves what makes up the peripheral nervous system voluntary control of skeletal muscle in the somatic nervous system is ____ involuntary control of motor and sensory pathways in the autonomic nervous system is ____ myelin sheath formed around selected axons to create an insulation allowing for quicker nerve impulse conduction dendrite the bushy, branching extensions of a neuron that receive messages and conduct impulses toward the cell body neuron transmit and receive electrical and chemical impulses neuroglial cells provide physical support, insulation, and nutrients for neurons; "nerve glue" unipolar neuron neuron that has a short, single projection from the cell body pseudounipolar neuron neuron with continuous dendrite and axon, with cell body off to one side bipolar neuron a neuron with one axon and one dendrite attached to its soma multipolar neuron neuron with a single axon and multiple dendrites; the most common type of neuron in the nervous system sensory neurons transmit impulses from peripheral sensory receptors to CNS interneurons CNS neurons that internally communicate and intervene between the sensory inputs and motor outputs; transmit neuron to neuron motor neurons transmit impulses from CNS to effector organ via efferent pathway astrocytes type of glial cell that fill space between neurons and surround blood vessels in CNS oligodendrocytes type of glial cell that deposits myelin within CNS microglia type of glial cell that remove debris in CNS ependymal cells type of glial cell that line CSF-filled cavities of the brain and spinal cord schwann cells type of glial cell that wrap around and cover axons in PNS with myelin; form and maintain myelin sheath wallerian degeneration degeneration of the distal portion of the axon divide mature neurons cannot _____; and injury to them causes permanent damage or loss neurotransmitters what do neurons release in response to arrival of an electrical impulse in order to influence nearby neurons action potential