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Chapter 13 Nervous System

Tyler M

Martini Anatomy chapter 13

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1.composed of primarily myelinated axons
7.lie entirely within the CNS and are multipolar, receive nerve impulses from many other neurons and carry out the integrative processing function of the nervous system
9.transmit motor impulses (output) from the CNS to the muscles or internal organs
10.a cellular and fibrous connective tissue layer that wraps groups of axons and their supporting blood vessels into bundles called fasicles
11.houses motor neurons and interneuron cell bodies, dendrites, axonal terminals, and unmyelinated axons
15.neuron that has a single dentritic/axonal process (EX. somatic receptors)
16.conduct signals from the PNS to the brain
17.1 of 2 main functions of the nervous system
19.progressive demyelination of neurons in the CNS accompanied by destruction of oligodendrocytes
20.bundles of myelinated axons with a common origin and destination
21.nuerons conduct nerve impulses through their dendritic and cell body membranes away from the synapse
23.a delicate layer of areolar connective tissue surrounding an axon and it's capillary
25.conveys motor impulses from the CNS to the muscles, organs, and glands (efferent)
26.loss of feeling, numbness, and tingling sensations resulting from damage to sensory nerves
29.initiates skeletal muscle respones to stimuli, and largely under voluntary control
31.contained in the glial cells of the CNS, large cells with cytoplasmic extentsions that form myelin sheaths around nearby neurons
32.the nerve impulses jump from node of ranvier to node of ranvier, aka saltatory conduction, and is faster
34.provides involuntary control of the body and organs, and internal functions
35.process by which part of an axon is wrapped with a myelin sheath, a protective safety coating that gives it a glossy white appearance, supports protects insulates an axon, no change in voltage can occur
36.the predominant type of synapse in mammals
39.nueron that has multiple processes, but axons cannot be distinguished from dendrites
40.components are the general somatic senses touch, pain, pressure, vibration, temperature, and proprioception
43.nerves that convey sensory information to the CNS (afferent)
47.conduct signals from the brain to the PNS
48.deliver sensory input to the CNS
49.neuron that has 3 or more processes (EX. interneurons and motor neurons)
50.innervates internal organs, regulates smooth muscle, cardiac muscle, and glands. (AKA involuntary nervous system)
51.a superficial layer of dense irregular connective tissue, containing the entire nerve, providing both support and protection
52.glial cell tumors
2.deliver sensory output from the CNS to various target organs
3.contains cranial nerves, spinal nerves, and ganglia
4.contained in the glial cells of the CNS, line the internal cavities of the brain and central canal of the spinal cord, forms the cerebrospinal fluid
5.transmit nerve impulses through their axonal membranes toward a synapse
6.the nerve impulse must travel the entire length of the axon a process known as continuous conduction, and is slower
8.rare in the human body, but can be found in cardiac muscle...
12.serves as the neuron's control center and is responsible for receiving, intergrating, and sending nerve impulses
13.recieves sensory information (input) from the receptors and transmit this information to the CNS
14.conducts nerve impulses from the CNS to the skeletal muscles (AKA voluntary nervous system)
18.neuron has 2 processes (EX. Vision)
22.contained in the glial cells of the CNS, also called nuerommocytes, produce the myelin sheath that surrounds the cells in the PNS
24.contain both sensory, and motor neurons
27.components transmit nerve impulses from blood vessels and viscera to the CNS. the visceral senses primarily include temperature, stretch (of the organ wall) , and C02 concentration of the body fluids
28.contains a cell body, dendrites, and axons
30.contains the brain and spinal cord
33.contained in the glial cells of the CNS, form a structural framework, replaces damaged cells, starlike projections
37.are nonexcitable cells that support and protect the neurons, they DO NOT transmit nerve impulses, also protect and nourish neurons...
38.contained in glial cells of the CNS, smallest group of CNS glial cells, removes debris from damaged neuron tissue through phagocytosis
41.transmit a nerve impulse away from the cell body towards another cell, typically larger, and longer nerve cells, and most neurons only have 1
42.conduct nerve impulses toward the cell body, tend to be shorter smaller projections that branch from the cell body, some neurons may only have 1 while others have many
44.a group of tracts within the spinal cord
45.are excitable cells that initiate and transmit nerve impulses
46.1 of 2 main functions of the nervous system

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