Control of Salivary Secretion Flashcards
how is saliva secretion controlled
whole system under neurological control
what are the nerves causing the salivary glands to sec
efefrent nerves
secretomotor
what comes from the initiating signal (stimulus)
parasymp outflow from brainstem salivary nuc
simp outflow from thoracic spinal cord
together inc sec
what is released from parasymp nerves o the salivary gland
ACh release
what is released form simp nerves in salivary gland
NA release
alpha and beta receps
salivary efefrent nerves also
peptidergic nerves
what do peptidergic nerves effect
affect acing, ductal and myopia cells
what are the substances prod from effects f peptidergi nerves
neuropep transmitters?
sub P
vasoactive intestinal pep
calcitonin gene related peptide
what is the innervation of myopia cell
dual innervation
simp and parasymp
what is a reflex
innate automatic predictable goal directed involving CNS to known stimulus
what is an adequate stimulus for saliva prod
usually assc with feeding
what are the reflex control components of saliva sec
complex secretomotor an vasomotor innervation
is saliva sec dependant on reflex activity
yes
what do the parasymp and simp do
parasymp - control volume
simp - control protein in saliva
what si the stimuli for the gustatory reflex
stimuli delivered to gustatory receptors in taste buds
basic taste cause salivary secretion
what are the tastes assc with amount of saliva
sour > salt > bitter & sweet
what is the maximal flow achieved
5% citric acid
7ml/min
wat does the masticatory salivary reflex dept on
mechanoreceptive afferent neurones innervating
- PDL
- oral mucosa
- TMJ
- muscle
how does one abstain a sample of saliva
lashley cup and cannula
does a true olfactory parotid salivary reflex exist in humans
no
but an olfactory submandibular salivary reflex does exist
hat does the intitiaing signal for salivation involve
higher centres that facilitate it
but also inhibit
enhance response
what sit he role of the higher centres
conditioning the response
an assc of stimulus with actual food intake rather than the direct oral stimulus of food intake
what are some examples of condtiones reflexes
pavlov
learning
sight, smell and sound
what is the psychic stimuli
mouthwatering
anticipation
- awareness of saliva
- performed saliva erected by contraction of myopia cells
