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23 Cards in this Set

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synapse b/w 2 neurons is
ganglion
what is released by all preganglionic neurons?
Ach
what are two branches of ANS
sympathetic, parasympathetic
where does sympathetic NS arise from?
thoracolumbar portion of spinal cord
what are relative lengths of neurons in sympathetic NS?
short preganglionic
long postganglionic
sympathetic innerv. of somatic structures enters and leaves from where?
enters white ramus
leaves via gray ramus
sympathetic innerv. of visceral organs in thoracic cavity enters and leaves from where?
enters white ramus
leaves ? to supply thoracic organs
what is transmitter for postganglionic neurons
norepinephrine
length ratio of ganglionic sympathetics in adrenal medulla
long pre-ganglionic
very short post-ganglionic
post-ganglionic of adrenal medulla release what and in what proportions
adrenaline/epinephrine(80%) and noradrenaline/norepinephrine(20%)
where does parasympathetic NS arise from?
brain and sacral portion of cord
ration of lengths of parasympathetic NS neurons
long preganglionic
short postganglionic
what is postganglionic transmitter for parasympathetic NS?
Ach
which of sensory receptors do not adapt?
pain
classes of receptors according to location
exteroceptor - sensitive to external environment
interoceptor - sensitive to internal environment
proprioceptor - located in tendons, muscles, joints
classes of receptors according to structure
free nerve endings
corpuscles
characteristics of free nerve endings
-free dendritic endings in skin(pain and touch)
-root hair plexus(wrapped around hair follicle)hair movement
example of corpuscle
Pacinian corpuscle-lamellated(pressure)
two types of senses
general/somatic = simple, widespread, in skin and muscles
special = receptors are localized, taste, smell, sight, etc.
olfactory epithelium is located where?
roof of nasal cavity beneath cribriform plate
olfaction is connected with what parts of brain
emotional(limbic)
what are the small raised bumps on the surface of the tongue
papillae
what is path of olfactory nerve?
through cribriform foramina to synapse on olfactory bulb