midterm Flashcards
cranial nerves that play a role in eating
originate in the brain stem
CN I, V, VII, IX, X, XII
CN I
olafactory smell
chewing, movements of the lower jaw, movement of the palatal elevators, respnsible for sucking, initiates the swallow, tastes, facial expressoins, signals to the salivary glads.
trigeminal cnv
provides information to the back of the tongue, bitter tastes, muscles used in swallowing fibers to the salivary glands.
glossopharyngeal cn ix
motor and sensory connections of the pharynx, larynx, esophagus and the heart. provides contributions to respiration, blood pressure, heart rate.
vagus nerve cnx
assists in the contraction of tongue assists in bolus preparation, sucking and swallowing.
hypoglossal nerve: cnxii
seeing and smelling food, opening the mouth for the food to enter, biting, chewing, preparing and organizing the bolus.
ORAL prep phase
oral STAGE
bolus formation and cohesion continues, actively propels the bolus posteriorly to the back of the mouth
pharyngeal
nasal and laryngeal structures do their job of valving these openings so that food does not enter the airway.
the swallow reflex is triggered
the bolus moves through the pharynx
the bolus enters the esophagus.
esophageal
movement of bolus through the esophagus into the stomach
the UES relaxes
hyoid bone elevates
the UES closes immediately
gravity peristalsis, and changes in pressure move the food.
the LES relaxes and opens
food enters the stomach
the LES closes immediately.
o months- newporn”post term” the mother’s placenta helps the baby____ while it is growing in the womb
“breathe”
at birth the baby’s lungs are ____.
filled with fluid, they are not inflated.
baby takes its first breath within about _____ seconds after delivery.
10 seconds.
the babys first breath sounds like a gasp as the newborn’s CNS
CNS reacts to sudden change in temperature and environment.
after the first breath a number of changes occur in the infant’s lungs and circulatory system.
- increased oxygen in the lungs causes a decrease in blood flow resistance to the lungs
blood flow resistance of the baby’s blood vessels also increases
fluid drains4fluid is absorbed from the respiratory system
llungs inflate and begin working on their own.