Intro package Flashcards
(21 cards)
Ganglia are ________
concentrations of cell bodies OUTSIDE the brain and spinal cord (IN PNS OUT OF CNS)
Two divisions of PNS ganglion?
Autonomic ganglia
Dorsal Root ganglia
What cell bodies are housed in autonomic ganglia?
autonomic POSTganglionic MOTOR neurons
Cell bodies of somatic sensory neurons are housed where?
DORSAL root ganglion
What division of the PNS relates to structures OUTSIDE the viscera? name the effectors of this division
Somatic nervous system
Skeletal muscle
The enteric nervous system has two plexuses; explain what each innervates respectively
submucosal-glandular/endocrine cells in mucosa
myenteric- smooth muscle in muscularis mucosa to regulate motility; glandular and endocrine cells and vascular smooth muscle (VASOCONSTRICTION)
What is S.L.U.D.D
salivation
lacrimation
Digestion
defecation
What nervous system has cardiac muscle as an effector?
Autonomic Nervous System
PSNS and Sympathetic Nervous system
What receptors are included in the autonomic nervous system
baroreceptors and chemoreceptors
Special sensory receptors are located in which nervous system?
Somatic nervous system
What are the effectors for the ENS?
smooth muscle of gut (longitudinal and circular ie pertistalsis)
glands (regulate production of exocrine hormones)
Explain the “pathology” of Hirschsprungs disease
Congenital ABSENSE of ENS plexuses (submucosal and myenteric)
LACK OF PERISTALSIS AS A RESULT (partial or total)
____activate action potentials _____DO NOT
neurons
neuroglia
Nueroglia cannot divide beyond infancy. True or False
FALSE
Neurons cannot but neuroglia CAN (pg4 notes)
clumps of pigment which build up with age in neuronal cell bodies are referred to as what?
lipofuscin granules
“ribosomes” of neurons are called?
Nissl Bodies (clusters of RER which synthesize proteins)
____make up the cytoskeleton of a neuronal cell body and aid in _____ transport
neurofilaments
vesicular
Dendrites are composed of ____ fibers. Are they usually myelinated or non? and what organelles do they contain?
afferent (TOWARD cell body)
NON myelinated
ALL except Golgi apparatus
Nerves can include both ______&_____ fibers from which nervous system divisions?
sensory and motor
autonomic and somatic divisions
What are tracts?
Bundles off NERVE FIBERS in CNS (LACK endo/epi/peri neurium)
Where is the action potential generated in the neuron?
TRIGGER ZONE ( btwn axon hillock and initial segment) pg 408 K&T pg4 notes
