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Final Exam 5 Nutri Sci 431 Questions with Latest Update
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Final Exam 5 Nutri Sci 431 Questions with Latest Update
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Final Exam 5 Nutri Sci 431 Questionswith Latest Update
Why is bacterial overgrowth positive? - Answer--nutrient production
Makes folate
Why is bacterial overgrowth negative? - Answer-Uses B12. When you have Atrophic
Gastritis, your B12 is already deficient.
What happens to iron in AG? - Answer-Conversion of ferric iron to ferrous iron, so
bioavailablity reduced
-decrease in iron chelate formation
-does NOT contribute to anemia significantly though
What happens to calcium in AG? - Answer--Less disassociation of Ca from calcium-
fiber complex
-Decreased calcium carbonate supplements.
(does not affect non-acid dependent forms of Ca)
What happens to Folic Acid in AG? - Answer--Decrease in uptake of folic acide into
mucosal cell due to higher pH
-BUT made by bacterial overgrowth, so folic acid not affected.
What happens to vit B12 in AG? - Answer--Lack of cleavage of B12- food protein
complex
-reduced but with adequate intrinsic factor, should be OK. (free B12 can be absorbed)
Is macronutrient digestion or aborption affected? - Answer-Digestion-- Disgetion takes
place under the influence of acid and pepsin. The digestion of protein from the B12
molecule cannot take place without stomach acid secretion.
Absoprtion- pH dependent. B-12 cannot be absorbed due to not being cleaved.
Nutrient absorption affected by AG - Answer-Folic acid, vit B12, Ca, and Fe
Atrophic Gastritis - Answer--A loss of gradualr tissue that produces acid and intrinsic
factor. Inflammation of the lining of the stoamch-- glands lost as a result.
Factors leading to constipation in the elderly - Answer--Decreased gut motility and
reduced intervention to the colon
-dnetition
-low fiber intake
-medications
-low fluid intake
, How is fat absorption affected by age? - Answer-Normal digestion and absorption with
normal intakes-- which large intakes more gat in fecal matter
How is protein absorption affected by age? - Answer-Normal with normal intakes-- more
fecal N on high protein diets
Carbohydrate absorption is affected how by age? - Answer--Ability to digest lactose is
affected
Dietary treatment for lactose maldigestion/intolerance - Answer--SLow gastric emptying
through milk with meals, higher fat and/or sugar dairy products
-Small amounts of lactose containing food at any one time
-Use of low lactose dairy products
What is a common consequence of lactose intolerance in the elderly? - Answer-Elderly
need more calcium in the diet but are less tolerant to lactose
When does taste (dysgeusia and smell (hyposmia) dysfunction begin? - Answer-aroung
60 and more sever in older than 70
-odor detection threshold increased
-number of taste buds decreases
Dentition - Answer-Dry mouth can make swallowing diffiuclt-- aboid crunchy, dry, and
sticky foods
-dentures make chewing 75-85% more difficult nad lead to decrease in meats, fruits,
and veggies eaten
Saliva - Answer-Saliva production low in more than 70% of elderly-- makes taskting,
chewing and swallowing difficult
Espohagus affected by age jhow? - Answer-Epohageal peristalsis is prolonged and
amplitude decreaes at 60-80
-by 80-90 esophageal cnotracion aplitude diminished but function intact
-increased reflux
Stomach digestive functioning in the elderly - Answer-Acid production does not
decrease as a normal function of aging
Pancreas digestive functioning in the elderly - Answer-Small decrease in bicarb and
enzyme secretion but not cliniclally significant
Liver digestive functioning in the elderly - Answer-No changes in function relative to
nutrinet metabolism but ability to metabolize drugs seems to be affected
Intestine digestive functioning in the elderly - Answer-Decreased gut motility
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