Lecture 2 Notes Flashcards
We don’t store what?
Proteins
Amino acid
Monomer or Protein
Deamination
Ammonia is detoxified by the liver and turned into
urea
Urea is excreted from the
Kidney
Where is nitrogen?
In any protein
Protein =
Hundreds of AAs
Classes of Amino Acids (20)
- Essential (Indispensable) amino acids: 9
- No essentials (Dispensable) amino acids: 5
- Conditionally indespensable amino acids: 6
Protein balance:
A normal urinary urea nutrition
Positive nitrogen balance:
Growth, pregnancy
Negative nitrogen balance:
Burns, serious tissue injuries, fevers, fasting
Functions of Protein:
- Energy
- Water balance
- Metabolism
- Body Defense system
- Tissue building
- Immune System
-Growth
Food sources of proteins: Complete proteins
Meat
Fish
Poultry
Seafood
Soy
Food sources of proteins: Incomplete proteins
Plant-origin foods
Grains
Legumes
Nuts
Seeds
Fruits
Vegetables
Vegetarian Diet
Must combine foods to cover all AAs needs
Types of vegetarian diets
- Lacto-ovo vegetarian
- Lacto-vegetarian
- Ovo-vegetarian
- Vegan
During a vegetarian diet…
…. Anemia and weak bones may result because the minerals are depleted by the Phytic acid (grains cereals etc.)
Nitrogen balance =
(intake = excretion)
Digestion of proteins:
Mouth
Stomach
Pancreas
Small Intestine
Papsinogen activated by Hcl
Pepsin : Protein
Biologic Value (BV):
Based on nitrogen balnce
Kwashiorkor
more than 2 years
Marasmus
less than 2 years
Total caloric intake from protein:
10-35%
Peptic Ulcer Disease (PUD)
Duodenum ulcer & Gastric Ulcer
Before 30 minutes which ulcer?
Gastric Ulcer
After 30 minutes, which ulcer?
Duodenum Ulcer
Bioavailability:
Amount of nutrients absorbed
Lacteal (lymphatic):
Inside vili to absorb fat into the lymphatic system
Fiber is…
… Cellulose
Three main vessels of the intestines
Celiac
Superior Mesenteric Artery
Inferior Mesenteric Artery
Mesenteric Veins
Collect nutrients from the intestines
Portal Vein
Fusion of veins that go to liver
Portal Veins
DO NOT HAVE VALVES, can go either direction
Gluconeogenesis
Proteins turn to Glucose
Glycogenolysis
Glycogen turns to Glucose
Glycogenesis
Glucose turns to glycogen.
Lactose Intolerance
Is not an allergic reaction… lack of enzyme (Lactase)
Fuel Factors (kcal/g)
CH: 4
Fat: 9
Proteins: 4
Alcohol: 7
Water: 0
BMR Men:
1kcal x kg body weight x 24 h
BMR Women:
0.9 kcal x kg body weight x 24 h
TDEE
Total Daily Energy Expenditure
BMR
Basil, Metabolic, Rate
BMR x AF
TDEE
AF
Activity Factor