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Kim Ferguson

Anatomy Week 7

QuestionAnswer
Bundles of myelinated fibers make up the white matter of the nervous system.
Which of these glia cells are located in the peripheral nervous system? Schwann cells
What structure of the Schwann cell is essential to normal nerve growth and the regeneration of injured nerve fibers? neurilemma
Neurons have very limited capacity to repair themselves.
Chemical signals diffuse between neurons at this location. synapse
Identify the letter that indicates the region of a neuron where neurotransmitters are released. E
What term describes the bundles of nerve fibers within the central nervous system? tracts
Which of the following is not a structural classification of neurons? polar
A signal conduction route to and from the central nervous system is a(n) reflex arc.
Identify the letter that indicates a Schwann cell. C
Identify the letter that indicates the gaps between Schwann cells that are known as myelin sheath gaps (nodes of Ranvier). D
Identify which letter represents the most abundant category of glial cells in the CNS. B
This tends to be the longest cytoplasmic projection from a neuron. axon
The glia cells that help form the blood-brain barrier are the astrocytes.
The _____ nervous system is a complex network of nerve pathways embedded in the intestinal wall with a network of integrators and feedback loops that can act somewhat independently. enteric
Excitable cells that conduct the impulses are called neurons.
The _____ of a neuron is a single process that usually extends from a tapered portion of the cell body. axon
Identify which letter represents an oligodendrocyte. E
Nerves that originate from the brain are called _____ nerves. cranial
Identify which diagram represents a cell that produces a myelin sheath in the central nervous system. E
The efferent pathways of the autonomic nervous system can be divided into the __________ divisions. parasympathetic and sympathetic
The somatic nervous system carries information to the skeletal muscles.
This is the site of communication between neurons. synapse
Identify which diagram represents cells that produce and circulate cerebrospinal fluid. D
Identify which diagram represents a microglial cell. C
The structural and functional center of the entire nervous system is the _____ nervous system. central
Identify the letter that indicates the region of a neuron with a name that means "little hill." B
Axodendritic synapses occur between letter "E" on the diagram and this region on a proximal neuron. A
These regions of the neuron direct electrical currents toward the cell body. dendrite
The ________ of a presynaptic neuron associates with the dendrite of a postsynaptic neuron. axon terminal
The part of the nervous system that transmits impulses from the CNS to the skeletal muscle is the: Somatic nervous system.
A neuron that transmits a nerve impulse toward the central nervous system is called a(n): sensory neuron.
Most unipolar neurons are usually: sensory neurons.
Which of the following compounds cannot cross the blood-brain barrier? Dopamine
Which is true of a reflex arc? It always consists of an afferent neuron and an efferent neuron.
Regeneration of nerve fibers will take place only if the cell body is intact and the fibers have: a neurilemma.
Nerves that contain mostly afferent fibers are called _____ nerves. sensory
Which of the following is not a function of the central nervous system (CNS)? Integrating sensory information Evaluating the information Initiating an outgoing response All of the above are functions of the CNS.
Neurons in the CNS have less chance of regenerating for all of the following reasons except: microglia lay down scar tissue.
The afferent pathways of the autonomic nervous system: carry feedback information to integrating centers in the brain.
The largest and most numerous types of neuroglia are the: astrocytes.
Schwann cells have a function in the PNS that is similar to that of which cells in the CNS? Oligodendrocytes
Gray matter in the brain and spinal cord consists primarily of: cell bodies.
Along a neuron, the correct pathway for impulse conduction is: dendrite, cell body, and axon.
The white matter of the nervous system is made up of: myelinated fibers.
Small distinct regions of gray matter in the CNS are called: nuclei.
Dendrites conduct impulses _____ cell bodies. toward
Which of the following is the deepest connective tissue layer of a nerve? Endoneurium
Interneurons reside in the: CNS only.
The nervous system is organized to do which of the following? Detect changes in the external environment. Detect changes in the internal environment. Evaluate changes in the environment. All of the above are true.
Which is not true of the myelin sheath? It covers cell bodies in the brain and spinal cord.
Astrocytes attach to: neurons. blood vessels. both A and C.
A neuron that has only one axon but several dendrites is classified as a _____ neuron. multipolar
The nervous system can be divided: according to its structure. according to direction of information flow. by control of effectors. in all of the above ways.
The efferent pathways of the autonomic nervous system consist of the ________ nervous systems. sympathetic and parasympathetic
One of the components of the blood-brain barrier is: astrocytes.
Fascicles are held together by a connective tissue layer called the: perineurium.
In the human nervous system: there are almost equal numbers of glia cells and neurons.
Multipolar neurons have: multiple dendrites and one axon.
The autonomic nervous system does not stimulate: skeletal muscles.
Created by: Kferguson76
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