Nutrition Final Flashcards

1
Q

What are the leading causes of death in the U.S.?

A

Diseases of the heart, cancer, diabetes. suicide, kidney disease, and accidents.

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2
Q

What is nutrition?

A

The science of food; the nutrients and substances therein; their action; interaction; and balance in relation to health and disease; and the process by which the organism ingests, digests, absorbs, transports, utilizes, and excretes food substances.

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3
Q

What are nutrients?

A

Substances essential for health that the body cannot make or makes in quantities too small to support life.

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4
Q

What are characteristics of an ESSENTIAL nutrient?

A

Specific biological function
Absence from the diet leads to decline in biological function

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5
Q

Functions of nutrients

A

Provide energy
Important for growth and development
Keep body functions running smoothly.

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6
Q

Provide Energy

A

Most carbohydrates, proteins, and most lipids

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7
Q

Promote growth and development

A

Proteins, Lipids, some vitamins, some minerals, water

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8
Q

Regulate Body Processes

A

Proteins, some lipids, some vitamins, some minerals, water

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9
Q

Macronutrients

A

Carbohydrates, lipids, proteins, water

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10
Q

Micronutrients

A

Vitamins, minerals

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11
Q

What are Carbohydrates composed of?

A

Composed of carbon, hydrogen, and oxygen

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12
Q

Food Sources of Carbohydrates

A

Fruits, vegetables, grains and beans

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13
Q

Carbohydrate kcal/g

A

4 kcal/g

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14
Q

Simple forms of Carbs

A

Table sugar, blood sugar

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15
Q

Complex forms of Carbs

A

Starch, glycogen, fiber

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16
Q

What are Lipids composed of?

A

Carbon, oxygen, and hydrogen

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17
Q

Insoluble or Soluble?

A

Insoluble

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18
Q

How many kcal/g in Lipids

A

9kcal/g

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19
Q

Solid V.S. Liquid

A

Fats are lipids that are solid at room temp
Oils are lipids that are liquid at room temp

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20
Q

Triglycerides

A

Major form of fat in body
Major energy source for the body
Composed of 3 fatty acids attached to a glycerol backbone.

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21
Q

Saturated Fats

A

Solid
Animal Sources
Raise blood cholesterol
Cardiovascular disease

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22
Q

Unsaturated fats

A

Liquid
Plant sources
Healthier

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23
Q

Essential Fatty Acids

A

Linoleic Acid & Alpha-linolenic Acid
Regulate blood pressure
Regulate nerve transmission
Structural components
Found in vegetable oils and fish

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24
Q

Trans Fatty Acids are

A

Unsaturated fats that have been processed from cis form to trans form

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25
Trans fatty acids are found in
Deep fried foods Baked snack foods Solid fats
26
What are proteins composed of?
Carbon Oxygen Hydrogen Nitrogen
27
Structural Components of Proteins
Bone Muscle Blood Cell membranes Enzymes Immune factors
28
How many kcal/g in protein?
4kcal/g
29
How are proteins formed?
Bonding from amino acids
30
Function of vitamins
Enable chemical reactions Releases energy does NOT provide energy
31
Fat-soluble vitamins
A, D, E, and K Accumulate and cause toxicity
32
Water-soluble Vitamins
Vitamin C and the B-vitamins Destroyed by cooking Excreted from the body more readily
33
What are minerals?
Inorganic substances
34
Factors of minerals
Not destroyed by cooking Yield NO energy Required for normal body function
35
Major Groups of Minerals
Major minerals: Needed in gram amounts Trace minerals: needed in <100 mg
36
What is needed in the largest quantity of all the nutrients?
Water
37
Functions of Water
Solvent Lubricant Transports nutrients Regulates body temperature
38
Sources of Water
Food and Drink Byproduct of metabolism
39
Phytochemicals
Active compounds found in plants
40
Zoochemical
Active compounds found in animals
41
What are Functions Foods?
Foods rich in phytochemicals and zoochemicals
42
Functional Food Categories
Conventional: Unmodified whole foods Modified: Fortified, enriched Medical: formula or supplement Special Dietary Use: Meet dietary need
43
What are fermented foods
Foods that rely on bacteria, yeast or fungi Can be used as probiotic Yogurt is a common example
44
Do our genes effect our nutrition
Yes, DNA directs how the body uses the nutrients consumed
45
Family History Risk Factors
Diabetes Cancer Osteoporosis Hypertension Obesity
46
Case-Control Study
Individuals who have the condition (case) are compared to those who don't (controls)
47
Blinded Study
Control groups usually receive a placebo Only the participant does not know who is receiving the placebo or the treatment.
48
Dietary Reference Intakes (DRIs)
Recommendations from the Food and Nutrition Board Apply to people in U.S. and Canada 5 sets of standards: EAR, RDA, AI, UL, EER
49
Estimated Average Requirements (EARs)
Meet the needs of 50% of those in a life stage Evaluates the adequacy of diets in GROUPS Based on optimal intake for functional markers of the nutrient
50
Recommended Dietary Allowances (RDAs)
Meet the needs of nearly all individuals (97 to 98%) Nutrients ability to prevent chronic disease Higher-than-average human needs
51
Adequate Intakes
Daily intake amounts set for nutrients which there is INSUFFICIENT RESEARCH to establish an EAR Average nutrient intake that maintains a defined nutritional state Cover the needs of 97 - 98% of individuals
52
Tolerable Upper Intake Levels (Upper Levels or ULs)
Daily intake amounts of nutrients that are not likely to cause adverse health effects on 97 t0 98% of individuals Applies to chronic daily use Not a nutritional goal
53
Estimated Energy Requirements (EERs)
Average daily energy (calorie) need for each life-stage froup How many calories you need each day Enegy from carbohydrates, protein, fat and alcohol, consumed in amounts above need is stored as body fat Used to promote healthy body weight
54
Acceptable Macronutrient Distribution Ranges (AMDRs)
NOT a DRI Set for intakes of carbs, proteins, fats, essential fatty acids
55
What are empty calories?
Foods that contain little to no nutritional value. They are high in fat and sugar.
55
Daily Values (DVs)
Generic standards developed by FDA Found on nutrition labels Based on RDIs and DRVs
56
Reference Daily Intakes (RDIs)
Set for vitamins and most minerals For people over age of 4 Used to calculate percent DV on Nutrition Facts panels
57
Daily Reference Values (DRVs)
Standards for: Energy-producing nutrients Cholesterol Sodium FDA selected 2000 calories as the reference
58
DRVs for Nutrients
35% of calories for fat 10% of calories for sat fat 60% of calories for carbs 10% of calories for proteins
59
Nutrition Labels Include
Product Name Name and Address of manufacturer Amount of product in package Ingredients list in descending order by weight Nutrition facts panel Ingredients that are common allergens.
60
Nutrient Content Claims
Describe the nutrients in a food and closely regulated by the FDA
61
Health Claims
Describe a relationship between a disease and a nutrient, food, or constituent Regulated by FDA
62
Qualified Health Claims
Based on incomplete scientific evidence and regulated by the FDA
63
Structure/function claims
Describe how a nutrient affects body structure or function and are not FDA approved
64
Energy Dense Foods
high in calories weigh very little nuts, cookies, fried foods
65
Low-energy-dense foods
Contain large amounts of water and few calores fruits, vegetables, stews, casseroles and oatmeal
66
MyPlate
Designed by the USDA 4 food group plan Milk, meat, fruit and vegetable, bread and cereal (grains)
67
Government programs
SNAP WIC School Lunch School Breakfast Child and Adult Care Programs for Seniors Food Banks
68
Organic Foods
Widely available Cost more Biological pest management Composting Manure Applications
69
Genetically Modified Foods
Regulated by FDA, USDA, EPA
70
Food Irradiation
Use radiation to extend the shelf life of food Control the growth of insects and pathogens FDA has approved for safety Must be labeled
71
Food Additives
Salt, sugar, vinegar, alcohol Found in processed foods Longer shelf life More appealing
72
Incidental Food Additves
Pesticides Arsenic BPA alters normal metabolic mechanisms and can cause thyroid dysfunction, liver and pancreatic damage Increased risk of obesity
73
Foodborne Illness Overview
Caused by pathogens Causes 48 million illnesses Nausea, vomiting, diarrhea, intestinal cramping
74
What is the Danger Zone?
41 degrees to 135 degrees
75
What are prions?
Infectious protein particles
76
What are toxins?
Produced by molds, algae, and plants Form endospores on the outside of food
77
What do mycotoxins cause?
Blood Disease Nervous system disorders Kidney and liver damage
78
Toxins in seafoods
Ciguatera toxin Shellfish poisoning
79
Toxins in plants
Natural toxins
80
Water Safety
Regulated by FDA Bottled water must list the source
81
Prevention FoodBorne and Waterborne Illnesses
Use good kitchen and personal hygiene Know which food pose an extra risk Follow appropriate thawing, cooking and storage procedures
82
Arsenic
Toxic element found in soil and water Linked to poor fetal growth and cancer in adults Brown rice is major source
83
Dioxins and Polychlorinated Biphenyls
Byproducts of industrial processes and incineration of waste Increased risk of cancer Can cause liver and nerve damage Freshwater fish
84
Cells have the ability to
grow absorb nutrients and other substances use energy conduct metabolic and physiological functions excrete waste
85
Cellular processes and reactions require energy from
Carbohydrates, proteins, and fats
86
Cells need
Water Building materials (amino acids and minerals) Chemical regulators (vitamins)
87
Tissues of the body
Epithelial Connectve Muscle Nervous
88
Epithelial Tissue
Covers surfaces of the body
89
Connective Tissues
Supports and protects
90
Muscle
Permits movement
91
Nervous
Transmits nerve impulses
92
Organs of the Body
Made of combined tissues Organ systems like: Digestive Nervous Cardiovascular Endocrine
93
Chemical Level
Atoms combine to form molecules, such as protein, carbohydrate, lipid, DNA, or RNA
94
Cell level
Molecules form organelles such as the nucleus and mitochondria, which make up cells
95
Tissue level
Similar cells and surrounding materials make up tissues
96
Organ Level
Different tissues combine to form organs such as the stomach and small intestine
97
Organ System Level
Organs such as the stomach and intestines make up an organ system
98
Organism Level
Organ systems make up an organism
99
Digestive System Overview
Digest food, absorbs nutrients, and excretes waste Controlled by hormones and the nervous system Houses bacteria
100
Mouth and Salivary Glands
Prepare food for swallowing: chewing, moistening with saliva Start digestion of starch with amylase enzyme Start digestion of fat with lingual lipase
101
Esophagus
Moves food to stomach by peristaltic waves initiated by swallowing
102
Stomach
Secretes gastric juice containing acid, enzymes and hormones Mixes food with gastric juice, converting it to liquid chyme Starts digestion of protein and fat Kills microorganisms with acid Secretes intrinsic factor, a protein required for vitamin B-12 absorption Slowly releases chyme to the small intestine
103
Liver
Produces bile to aid fat digestion and absorption
104
Gallbladder
Stores and concentrates bile and releases it to the intestine
105
Pancreas
Secretes pancreatic juice containing digestive enzymes and bicarbonate into the small intestine
106
Small intestine
Mixes chume with bile and pancreatic juice to complete digestion Secretes hormones that help regulate digestive processes Secretes digestive enzymes Absorbs nutrients and other compounds in foods Transports remaining residue to large intestine
107
Large intestine (colon)
Absorbs water and electrolytes Forms and stores feces Houses most of the gut microbiota
108
Rectum
Holds and expels feces via the anus
109
Alimentary Canal
Nutrients mist pass through the wall to be absorbed in the body Wall consists of 4 layers: Mucosa Submucosa Muscle Serosa
110
Sphincters
Ringlike muscles that work like valves to control flow of contents Prevent contents from moving backwards Allow for thorough mixing with digestive secretions
111
Saliva
Site of Production: Mouth Functions: Dissolves tase-forming compounds, protection of teeth
111
Digestive Enzymes
Protein molecules that speed up digestion Catalyze chemical reactions known as hydrolysis reactions Produced in salivary glands, stomach, pancreas, and small intestine Aids in the hydrolysis of carbs, proteins and fats
111
Mucus
Site of Production: Mouth, stomach, small and large intestine Functions: Protects GI tract cells, lubricates digesting food
112
Enzymes (amylases, lipases, proteases)
Site of Production: Mouth, stomach, small intestines, pancreas Functions: Break down carbohydrates, fats, and protein into forms small enough for absorption
113
Acid (HCI)
Site of Production: Stomach Functions: Promotes digestion of protein, destroys microorganisms, increases solubility of minerals
113
Biles
Site of Production: Liver (Stored in gallbladder) Functions: Aids in fat digestion (emulsifies fat)
113
Bicarbonate
Site of Production: Pancreas, small intestine Functions: Neutralizes stomach acid when it reaches the small intestine
114
Hormones
Site of Production: Stomach, small intestine, pancreas Functions: Regulate food intake, digestion and absorption
115
Saliva Contains
Mucus Lysozyme Amylase
116
Taste Buds Detect
Salty Sour Sweet Bitter Umami
117
Order of Digestion
Mouth Esophagus Stomach Small Intestine Large Intestine
118
Passive Diffusion
Nutrients move from an area of high concentration to an area of low concentration
119
Facilitated Diffusion
Movement from a high concentration area to a low concentration area, but a carrier protein is needed
120
Active Transport
Requires a carrier protein and energy Movement is from a low concentration area to a high concentration area
121
Endocytosis
Phagocytosis: Cells engulf compounds Pinocytosis: Cells engulf liquids
122
Gastroesophageal Reflux Disease
Heartburn occurs when stomach acid backflows into the esophagus AKA GERD Can be caused by: Smoking Pregnancy Overweight Alcohol Use Hiatal Hernia Foods
123
Nonalcoholic Fatty Liver Disease (NAFLD)
Occurs when liver store excess fat, which may cause liver swelling, inflammation, and scarry Excess alcohol intake can cause these changes Can occur from insulin resistance
124
Gallstones
Develop when cholesterol and bile pigments form crystal-like particles related to slow gallbladder motility and bile composition
125
Structures Of Carbohydrates
Includes sugar, starch and fiber Plants are main sources
126
Monosaccharides
Single Sugars Simple Sugar Glucose, fructose, galactose
127
Disaccharides
Double sugars Simple Sugar
128
Polysaccharides
Many glucose molecules linked together
129
Glucose
Most abundant monosaccharide Linked together with other sugars in our diets "Blood Sugar"
130
Fructose
Found in fruits, vegetables, honey and high-fructose corn syrup
131
Galactose
most in our diets is combined with glucose to form lactose
132
Sugar Alcohols
Derivatives of monosaccharides Sorbitol, mannitol, and xylitol Sweeten sugarless gums and diabetic foods
133
Pentoses
Monosaccharides with 5 carbons Includes ribose (RNA) and deoxyribose (DNA) Not supplied by the diet An essential part of the cell's genetic material
134
Maltose
2 glucose molecules Found in seeds and alcoholic beverages
135
Sucrose
1 molecule of glucose, 1 molecule of fructose Table sugar, fruie Sugarcane, sugar beets, maple tree sap
136
Lactose
1 molecule of glucose, 1 molecule of galactose Milk and milk products
137
Starch
The storage form of glucose in plants Amylose- Unbranched chain of glucose molecules Amylopectin: Highly-Branched chain of glucose molecules consisting of mostly alpha bonds
138
Glycogen
Storage form of carbohydrate in humans and animals Linked by alpha bonds More highly-branched than amylopectin Mainly stored in liver and muscle cells
139
Total Fiber
Dietary fiber, found naturally in foods, plus functional fiber, added to foods Found in many of the same foods as starch Cellulose, hemicellulose, pectins, gums and mucilages Linked together by beta bonds
140
Insoluble Fibers
Do not dissolve in water Form structural part of the plant cell Cellulose, hemicellulose, lignins Seeds, whole grains
141
Soluble Fibers
Dissolve in water Found inside and around plant cells Pectins, gums, mucilages, and some hemicelluloses Oat bran, skins and flesh of fruits and berries, thickeners in jams, yogurts, sauces, and fillings; seaweed and psyllium
142
Saccharin
Oldest alternative sweeteneer 300 times sweeter than sucrose ADI set at 5,g/kg body weight/day
143
Aspartame
Sweetened beverages, gelatin desserts, chewing gum, cookies, toppings and fillings of bakery goods
144
Sucralose
600 times sweeter than sucrose Made from sucrose Heat stable
145
Stevia
Derived from a plant from Amazon rain forest Approved to be used in beverages and to be sold as a dietary supplement.
146
Recommend Intake of Carbohydrates
RDA is 130 grams a day 45-65% of total energy intake
147
Recommended Intake of Sugars
Added sugars to no more than 10% of daily total energy intake Upper limit of 25%
148
Functions of Carbohydrates
Primary Source of energy Spare protein from use as energy prevent ketosis
149
Hyperglycemia
More Common high blood glucose levels Commonly associated with diabetes and metabolic syndrome
150
Hypoglycemia
Low blood glucose levels
151
Regulation of Blood glucose
Liver and pancreas are important in blood glucose control Liver determines amount of glucose that is needed to enter the blood stream after a meal Pancreas secretes insulin and glucagon
152
Insulin
Released after eating, when blood glucose levels are high Promotes increased: use of glucose as energy Lowers blood glucose levels
153
Glucagon
Released if no dietary carbohydrates are present, blood glucose levels have fallen Promotes increased: Breakdown of glycogen
154
Hypoglycemia
Can occur without diabetes Can be caused by injecting too much insulin, not eating enough, exercising without eating carbohydrates
155
Type 1 Diabetes
5% of cases of diabetes Autoimmune attack on pancreas Treatment: Insulin, diet, exercise Monitoring: Blood glucose, Urine Ketones
156
Type 2 Diabetes
90% of cases Insulin resistance Strong genetic predisposition Obesity and physical inactivity Treatment: Diet, exercise, insulin, oral medications Cardiovascular disease, kidney disease Monitoring: Blood glucose
157
Omega-3
Dilate blood vessels and decrease blood pressure
158
Omega-6
influence blood vessels to constrict and raise blood pressure
159
Phospholipid Functions
Cell membrane component Double layered outer covering of cells Regulates movement of substances in and out of cells
160
Phospholipd Functions 2
Emulsifier Forms a shell around fat droplets and suspends them in a watery solution Essential for fat digestion and transportation Bile and lecithin
161
Sterol functions
Carbons are arranged in a multi-ringed structures Cholesterol is a type of sterol used to make sexhormones, active forms of vitamin D, Adrenal horomones, Bile, cell membranes, and shell-covering chylomicrons
162
Sources of Sterols
Cholesterol is found in foods of animal origin Meat Fish Poultry Eggs Dairy Products Can be synthesized in the body
163
RDA for Fat
No RDA Range is 20-35% Cholesterol should be limited to 300mg/day Fat: No more than 20% of total calories Saturated fat: No more than 7% of total calories
164
Mediterranean Diet
Up to 40% of calories can be from fat if most are monounsaturated fats Olive oil as main fat Abundant intake of fruit, vegetables, whole grains, beans, nuts and seeds Include minimally processed and seasonally fresh, local foods Small amounts of cheese and yogurt daily Moderate intake of wine
165
Fat Digestion and Absorption
Begins in the mouth Lingual lipase: active during infancy, minor role in adukts Continues in the stomach, aided by gastric lipase Occurs mostly in the small intestine, fat in small intestine triggers release of cholecystokinin, which causes release of bile from gallbladder and lipase and colipase from pancreas
166
Fat Digestion and Absorption 2
Bile emulsifies fat Breaks down fat into micelles Increases the surface area of lipids and allows pancreatic lipase to breakdown triglycerides to free fatty acids and monoglycerides
167
Lipid Digestion
Starts in the mouth Moves to the stomach Then to the liver then to the pancreas moves to the small intestine ends in the large intestine
168
Chlomicrons
Dietary triglycerides reformed in the absorptive cells Cholesterol Phospholipid Protein
169
Apolipoprotein
Found in the protein portion of shell Turns on lipid transfer enzymes Assist in binding a lipoprotein to a receptor Assists enzymes
170
Transporting Lipids in the Blood
Lipids are transported in blood as lipoproteins Lipoproteins are composed of core lipids Covered with a shell of proteins, phospholipids, and cholesterol
171
Chylomicron
Primary Component: Triglyceride Key Role: Carries dietary fat from the small intestine to cells
172
VLDL
Primary Component: Triglyceride Key Role: Carries lipids both taken up and made by the liver to cells
172
LDL
Primary Component: Cholesterol Key Role: Carries cholesterol made by the liver and from other sources to cells
173
HDL
Primary Component: Protein Key Role: Helps remove cholesterol from cells and in turn excrete cholesterol from the body
174
Structure Of Proteins
Made of the elements carbon, hydrogen, oxygen and nitrogen Some contain sulfur These elements form amino acids which are building blocks for protein synthesis
175
Amino Acids
Supplied by protein containing foods (eat) and cell synthesis (make) Composed of central carbon, nitrogen group, acid group, hydrogen, side chain (Determines structure, function, and name of amino acid)
176
How many amino acids does the body need to function?
20 11 NONESSENTIAL amino acids body synthesizes them do not need to be obtained from the diet 9 ESSENTIAL amino acids Must be obtained from food Cannot be synthesized in the body
177
Conditionally Essential Amino Acids
Nonessential amino acids can be classified as conditionally essential during infancy, disease, and trauma.
178
Synthesis of Nonessential Amino Acids
Synthesized through transamination (transferring of an amino group from 1 amino acid to carbon skeleton to form a new amino acid) If amino group is lost and not transferred to another carbon skelton, the process is called DEAMINATION.
179
Animal Proteins
Contain all 9 essential amino acids Classified as complete, high quality proteins
180
Plant Proteins
Do not contain all 9 essential amino acids and are low in 1 or more Classified as incomplete, or low quality proteins
181
Synthesis of Proteins
Amino Acids are linked together by peptide bonds to form proteins Formed between the amino group and the acid group of amino acids
182
Dipeptides
2 amino aicds
183
Tripeptides
3 amino acids
184
Oligopeptides
4 to 9 amino acids
185
Polypeptides
10 or more amino acids
186
Transcription and Translation
Amino acids are linked together by peptide bonds to form proteins Synthesis of protein is determined through gene expression
187
DNA transcription phase
DNA code transferred from the nucleus to the cytosol via messenger RNA (mRNA) mRNA translation phase: tRNA and ribosomes DNA coded instructions using codons determine shape, and thus function, of proteins
188
Denaturation of Proteins
Alteration of proteins 3-dimensional structure Destroys proteins function Caused by exposure to acid or alkaline solutions, enzymes, heat, agitation
189
Recommended Intakes of Protein
RDA is 0.8g/kg of body weight AMDR is 10-35%
190
Protein Digestion and Absorption
Digestion starts in the stomach Hydrochloric acid denatures protein Pepsin breaks down long polypeptide chains Chyme entering the small intestine triggers the release if secretin and CCK Once in the liver amino acids are used for protein synthesis and energy needs
191
Functions of Proteins- Body Structures
Produce vital body structures