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Flo's Nervous System

Structure & Function, Brain, Spinal Cord, PNS, ANS

QuestionAnswer
What cells support, protect, insulate, and nourish neurons? Glial Cells
What is a bundle of fibers containing neurons and blood vessels? Nerve
What is the supporting structure of nerve tissue, located in the CNS, including phagocytic cells? Neuroglia
What functional unit of a nerve sends and receives nerve impulses? Neuron
What is the part of the neuron attached to a cell body that carries impulses to other neurons and body tissue? Axon
What is the main part of the nerve cell? Cell Body
Name the part of the neuron resembling tree branches that receives nerve impulses toward the cell body? Dendrite
What is a group of neuron cell bodies along the path of a nerve outside the CNS? Ganglion
What are neurons in the brain and spinal cord that conduct nerve impulses between afferent and efferent neurons? Integrative Neurons
Name the neurons that transmit nerve impulses from the CNS to muscles and glands? Efferent Neurons
What is the covering of an axon that has a whitish appearance? Myelin Sheath
Name a bundle of axons. Nerve Fibers
Covered with myelin sheath, as over nerve fibers, and appearing as white matter. Myelinated
What is a continuous plasma membrane around myelin sheath? Neurilemma
Name the neurons that transmit nerve impulses to the CNS from within and outside the body. Afferent Neurons
What are spaces where myelin sheath does not touch itself externally? Nodes of Ranvier
What is another name for integrative neurons? Interneurons
What is another name for efferent neurons? Motor Neurons
What is another name for afferent neurons? Sensory Neurons
What is sheath? A Covering
What are star-shaped nerve cells that hold blood vessels closer to nerve cells and serve as a barrier to transport water and salts between nerve cells and capillaries? Astrocytes
What are nerve cells that line the brain and central cavity of the spinal cord to serve as a barrier between CSF and tissue fluid? Epindymal Cells
What are nerve cells that engulf cellular waste and destroy microorganisms in nerve tissue; special macrophages to protect CNS? Microglia Cells
Name the nerve cells that produce and maintain myelin sheath. Oligodendroglia Cells
Name the surface area of the body where afferent fibers travel from a spinal root. Dermatome
What is an electrical signal that begins when a stimulus is received? Nerve Impulse
What are chemical substances that cause a nerve impulse to cross synapses? Neurotransmitters
What is a sensory nerve ending? Receptor
What is a change in the environment of a nerve cell; causes action. Stimulus
Name the space between the end of one neuron and the beginning of the next neuron. Synapse
Created by: crdb04