HUN 2201 Chapter Notes - Chapter 12: Dietary Reference Intake, Osteoporosis, Carbohydrate

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19 Feb 2018

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Recommended ranges: carbohydrate intake for children is the same as for adults: 45 to 65% of total energy intake, fat intake is higher for children than for adults: 30 to 40% of total energy intake for. 1-3 year olds and 25 to 35% for 4-18 year olds. Provide enough energy to support rapid growth and development. Therefore, as with adults, in most situations, children can meet their water needs by drinking enough to satisfy thirst. Water needs increase with illness, when the environmental temperature is high, and when activity increases losses from sweat: because children are smaller than adolescents and adults, the recommended amounts of most micronutrients are also smaller. Adequate intake is essential for achieving maximum peak bone mass, which is important for preventing osteoporosis later in life: rda for vitamin d is 600 iu/day for children and teens. Sunday, july 16, 2017: rda for iron is 7 mg/day for toddlers and 10 mg/day for young children.

Related Questions

1. How does prenatal body weight influence theamount of weight a woman should gain during pregnancy?

2. At what week of gestation does the embryonicperiod begin? When does the fetal period begin? When is the mostlikely time a teratogen can do the most damage, during theembryonic or fetal period?

3. What risks are there to a baby if the mothergains too little weight during the pregnancy? What risks are thereto a baby if the mother gains too much weight during thepregnancy?

4. What is the relationship between mercury,fish and pregnancy?

5. What are some of the common gastrointestinaldistresses pregnant women experience? What remedies are availableto manage them?

6. What is fetal alcohol syndrome? How can itbe prevented? When can it be most accurately diagnosed?

7. How does the MyPlate food guidance systemsupport a healthy pregnancy?

8. Why is a prenatal dietary supplementrecommended throughout pregnancy?

9. What benefits are there to exercising duringpregnancy? How should exercise be modified during eachtrimester?

10. What is one of the best ways to trackgrowth in children? What are you looking for when you trackgrowth?

11. What benefits to the infant are provided bybreastfeeding?

12. What benefits to the mother are provided bybreastfeeding?

13. What nutrients are vital for supportingdental health in infants and children?

14. Although breast milk has advantages overformula, breastfeeding not recommend if the nursing mother haswhich conditions?

15. At what age is it safe to switch fromformula or breast milk to cowâs milk?

16. Which solid foods should be introducedfirst and at what age and why: cereals, vegetables, andfruits?

17. Do infants have the same AMDRs as adults?If not, how are they different? Is the grams/kg body weight forprotein higher or lower for an infant compared to a teenager oradult?

18. Does eating sugary foods lead tohyperactivity in children? If not, what does?

19. What is the division of responsibilitybetween caregivers and children for feeding?

20. How would you outline a healthy dailyschedule and meal/snack pattern to follow for a preschooler and aschool-aged child?

21. Can the MyPlate tool support childhoodnutrition? How? What other tools can be used?

22. What are the consequences of obesity inchildhood? How can childhood obesity be prevented?

23. How can food allergies be prevented andmanaged in childhood?

24. The rapid weight gains that girlsexperience during adolescence begin at what ages? Forboys?

25. Are the AMDR guidelines for adults the sameas for teenagers? What are these guidelines? (Percent calories fromfat? Carbohydrate? Protein?)

26. Why are calcium and iron the most importantminerals for teenagers? Does gender make a difference?

27. If teens are overweight and it isunrealistic to believe they will grow into their current weight?What rate of weight loss is recommended in terms of pound(s) perweek?

28. Describe the typical diets of teens thatsmoke?

29. What is the nutritional consequence alcoholfor teens?

30. Adolescences should be physically activefor how many minutes/day?

31. How does body composition change over theyears? Is there anything one can do to affect this change?

32. Does Basal metabolic rate increase ordecrease with age? Why? Will the elderly need more or fewercalories per kilo body weight than those who are middleaged?

33. Do the elderly need more or less fluid percalorie intake than younger adults? Why?

34. If an elderly person has osteoporosis, canhe or she do anything to improve this condition?

35. How can a poverty-stricken older adult beassured of eating healthy meals on a regular basis?

36. Why is exercise important for theelderly?

37. How many calories are there in a gram ofalcohol? Why does consuming 2 alcoholic drinks in a man has thesame physiological affect as one drink for a woman?

38. What practices will decrease the rate ofalcohol absorption into the blood?

39. Define moderate alcohol intake in terms ofdrinks per day for men and women and say how it relates to HDLcholesterol.

viridianleopard15

Part 1

The enzyme responsible for the synthesis of ATP is

Multiple choice

ATP-ase.

cytochrome C.

NADPH.

ATP synthase.

Part 2

The terminal electron acceptor in the electron transport chain is water.

True/Fale

Part 3

Alex, Kim, and Jenna have different levels of activity, and thus require a varied amount of calories per day. Alex is an athlete, and he requires 3500 calories per day to fuel his high intensity activity. Jenna is a secretary and is sedentary most of her day. Her low level of activity requires a mere 1800 calories a day, while Kim, a professional dancer, needs 2800 calories per day to fuel her moderate level of activity.

	Jenna	Kim	Alex
Profession	Secretary	Professional Dancer	Athlete
Level of Activity	Low	Moderate	High
Caloric Needs	1800 Calories/Day	2800 Calories/Day	3500 Calories/Day

Fats are broken down in cellular respiration to generate the ATP needed to fuel our bodies. According to the Food and Drug Administration (FDA), the Percent Recommended Daily value for fats in a balanced diet should not exceed more than 30% of the total daily calorie intake. Fats provide 9 calories per gram.

Nutritional needs of Jenna

What question would this calculation answer?
Finding 30% of 1800 calories and then dividing by 9 calories per gram.
1800 calories x 0.30 = 440 calories
440 calories/9 calories per gram = 49 grams

Multiple Choice

How many grams of fat can Jenna consume in one meal?

How many fat calories can Jenna consume each day?

How many calories are found in 9 grams of fat?

How many grams of fat can Jenna consume each day?

Part 4

Proton pumps are protein complexes that

Multiple Choice

synthesize water from hydrogen and oxygen.

break down water into hydrogen and oxygen.

move hydrogen ions across cell membranes.

move electrons through the cell membrane.

Part 5

As protons move through the proton pump,

Multiple Choice

the membrane becomes more permeable to the hydrogen ions.

the concentration of hydrogen ions inside and outside the cell reaches equilibrium.

they build up on one side of the membrane, producing a concentration gradient.

conformational changes occur within the membrane proteins.

Part 6

The transfer of hydrogen ions across the membrane generates a potential energy gradient.

True/False

The people of Malaysia belong to three communities: the local people called Malays, immigrants from South India called Tamils, and immigrants from China. During the early 20th century, the Malays lived mainly in coastal villages, the Tamils worked on rubber estates, and the Chinese worked in tin mines. In general, the people were very poor and they consumed a limited variety of foods.[1] Rice was the staple diet of all three communities and therefore the key source of caloric and nutrient content. Malays typically grew their own rice and dehulled it before consuming it; dehulling partially removes the aleurone layer of the rice seed. Following their South Indian food habits, the Tamils ate parboiled rice, and the Chinese ate polished white rice imported from Thailand. It was found that among the three Malaysian communities, the Chinese community was much more prone to suffer from some degree of sub-optimal thiamin intake. Out of every 1,000 Chinese inhabitants, about 120 had mild thiamin deficiency, about 80 had severe thiamin deficiency, and about 16 people had died of it. Suboptimal intake of thiamin was rare in Malays and was not reported at all in Tamils.[1] Thiamin, also called Vitamin B1, is required for all tissues, and its deficiency causes the disease Beriberi. Less severe deficiency results in non-specific symptoms such as weight loss, malaise, irritability, and confusion. Although the origin of the word Beri-beri is disputed, it is believed to be a Philippine word meaning âI canât, I canâtâ and was probably coined to refer to the lack of neuromotor coordination in people afflicted with this disease.[2] Thiamin is water-soluble and is stable in the acidic medium. It is unstable to heat, oxygen, and UV light in neutral and alkaline medium. The active form of thiamin is thiamin pyrophosphate (TPP). This active form is a cofactor for pyruvate dehydrogenase and transketolase enzymes that are involved in the metabolism of carbohydrates. These enzymes play an important role in the biosynthesis of a number of cell constituents such as neurotransmitters, pentoses, and reduced equivalents, used in oxidant stress. The human body cannot store thiamin and therefore requires a continuous supply of the vitamin. The thiamin in an individual on a thiamin-free diet typically depletes in fewer than two weeks. Thiamin absorption is affected by compounds, called thiamin antagonists or anti-thiamin factors, that alter the structure of thiamin. These compounds include alcohols, polyphenols, flavonoids, and thiaminase, a heat labile enzyme found in certain foods.[2] In affluent countries, where the diet is rich in thiamin, the most common cause of thiamin deficiency is excessive alcohol consumption. Alcohol intake affects thiamin status in two ways. First, alcoholics get a significant percentage of their daily energy intake from alcoholic beverages, which are nutrient deficient. In other words, alcoholics replace their consumption of nutrient dense foods that are part of their normal diet with the consumption of nutrient deficient alcohol. Second, alcohol inhibits the intestinal ATPase involved in the absorption of thiamin.[4] Sub-clinical thiamin insufficiency associated with excessive alcohol consumption produces an encephalopathy called Wernicke-Korsafoff syndrome. Patients with this syndrome have a higher than normal incidence of abnormal transketolase, which has a very low binding affinity to TPP. This problem can be overcome by putting patients on high-dose thiamin therapy. Some patients, however, might have a form of abnormal transketolase that does not bind at all with TPP. Such people do not respond to high-dose thiamin therapy.[4] Thiamin deficiency is observed in individuals who have low thiamin intake and a diet rich in polished rice, especially if their diet also consists of anti-thiamin factors such as tea, coffee, raw fermented fish, and betel nuts. The minimum amount of thiamin needed by the body can increase because of increased physiological or metabolic demands arising from pregnancy and lactation, heavy physical exertion, illnesses like cancer, liver diseases, hyperthyroidism, and surgery. Since TPP is required for carbohydrate metabolism, the recommended dietary allowances for thiamin are based on the assumption that its intake is related to total energy intake. The recommended dietary allowance in the United States is 0.5 mg/1000 Kcal.

Questions
1. Thiamin deficiency was observed only in the Chinese community even though all three
communities had the same staple (rice) diet. Explain.
2. On packages of enriched rice sold in supermarkets, the rice preparation directions state that the
rice should not be washed before cooking. Explain.
3. Severe metabolic acidosis caused by high levels of lactate is often associated with thiamin
deficiency. Explain.
4. Provide two plausible explanations for what might cause above normal levels of pyruvate in blood
and urine. How can one determine which of the two explanations is correct?
5. Why does thiamin utilization increase among cancer patients?
6. A negative correlation exists between the need for thiamin and the amount of fat in the diet.
Explain.

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HUN 2201 Chapter Notes - Chapter 12: Dietary Reference Intake, Osteoporosis, Carbohydrate

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