bio12 digestion
the major advantage of physical digestion is that it....
makes chemical digestion more efficient
starch digestion begins in the...
mouth
whats the best description of swallowing
occurs in the pharynx requires 2 layers of muscle
what is the location and function of the cardiac sphincter
where the stomache and esophogus meet; prevents heartburn
the release of gastric juice is triggered by
a hormone in blood
gastric juice contains what?
HCl, water and pepsinogen
what is effective in the stomach because of HCl?
pepsin
what does pepsin produce majorly
polypeptides
what happens when pyloric sphincter relaxes
acid chyme enters the duodenum
what is the target of CCK
pancreas and gall bladder
the liver uses toxic...
NH3 to make urea which is less toxic
what organ stores secretions that functions in the duodenum
gall bladder
what causes the release of pencreatic juices
hormones from the duodenum
what condition increases glucose conversion to glycogen
high insulin and low glycagon
what is least likely to be found in plasma
glycogen
what is excretion
the process of a substance exiting body that is a part of the body(pee)
what is elimination
process of a substance exiting the body that is not a part of the body (poo)
what does the mouth do in digestion:
1. lips- hold food in oral cavity
2. teeth-breaks food down
3. saliva-moistens food
what role does salivatary gland play
produces saliva, begins chemical digestion of starch
how many salivatory glands do we have
3
endocrine?
INTO blood( organs that make n secrete a substance)
exocrine?
releases hormones into duct, cavity or outside... EXIT
bolus? vs chyme
bolus: shewed up chunk of food before reaching stomach
chyme: food once it reaches the stomach
what is peristalsis
rhythmic contractions of smooth muscles of esophagus wall, pushing the bolus along, happens all along the digestive tract