lesson 10 part 5 Flashcards
what causes the breakdown of starch
salivary amylase breaking it down to maltose
is normally secreted continuously to keep the mouth moist, but when food enters the mouth much large amount of saliva pour out.
saliva
what reflexes are initiated by different stimuli that triggers emotional stimuli causing salivation?
parasympathetic fibers in craniel nerves VII and IX
have no digestive functions.
They simply provide passageways to carry food to the next processing site, the stomach.
pharynx and esophagus
in the food propulsion-swallowing prestalsis what several structures are involved?
tongue, soft palate, pharynx and esophagus
what are the two major phases of the food propulsion-swallowing peristalsis?
voluntary buccal phase and involuntary pharyngealesophageal phase
Occurs in the mouth during food propulsion
Voluntary Buccal Phase
first phase of the food propulsion
voluntary buccal phase
Transports food through the pharynx and esophagus
involuntary pharyngealesophageal phase
controls the phase of involuntary parhynesophageal phase and promotes the mobility of the digestive organs from this point on.
vagus nerves
what is the protective reflex of the body during a short circuit?
coughing
why can austronauts still intake food during zero gravity?
due to gravity playing a role in the digestive process
adjacent and neighboring segments of the intestines alternately contract and relax thereby moving bolus distally along the tract?
peristalsis
An involuntary and involves alternating waves of contraction
and relaxation of the muscles and organs.
perstalsis
_________ of the intestines alternately contract by inactive ones, the food is moved forward and then backward. Thus the food is mixed rather simply propelled along the tracts
segmentation
