AS Nutrition Flashcards
How to obtain feed?
Acquire, Process, Digest, Metabolize, Energy, Excrete (Whatever not used)
Why is nutrition important?
4 reasons
- Largest Expense
- Animal Behavior
- Animal Health
- Animal Productiviy
What are the major substances in plants and animal tissues?
6 things
- Water
- Carbohydrates
- Fats
- Proteins
- Minerals
- Vitamins
Percent of water, protein and minerals under a fat free basis (FFB)?
75% water
20% protein
5% minerals
5 Functions of water
- Transportation of nutrients and excreta
- Solvent for chemical reactions
- Body temperature regulations
- Maintains shape of body cells
- Lubricates and cushions joints and internal organs
What happens when you restrict water>
- Lose 10% of body water and body functions will be disturbed
- Lose 20% or more and death is likely
3 water sources
- Drinking water
- Ingested water (feed)
- Metabolic water (Water produced from ATP)
5 Ways of water loss
- Excreta
- Vaporization
- Evaporation
- Dissipation through the skin
- Milk (during lactation)
Carbohydrate composition and molecular weight?
Organic compound
40% Carbon
7% Hydrogen
53% Oxygen
Very little CHO found in animals but 70-75% DM in plants
largest source of energy in most diets; represents 50-75% of total DM in live stock feed
Photosynthesis
6CO2 + 6H2O + Energy = C6H12O6 + 6O2
Carbohydrates: Non-Structural
- sugars
- starch; polysacharide
- pectins
- gums
Carbohydrates: Structural
- Hemicellulose
- Cellulose
- Lignin
- from plant tissues (cell walls)
monosaccharides
simple sugars
- pentose
- hexoses
- glucose
- fructose
disaccharides
- two molecules of simple sugar
- condensation
- C12H22O11
- remove water to put together
polysaccharides
complex chain of simple sugars
glycogen= animal liver
Starch
- alpha linked glucose chain
- amylose; amlypectin, seeds, fruits, tubers
Cellulose
- beta linked glucose chain
- mostly in plant cell walls
- end product is primarily VFA’s
4 major functions of CHO
- Energy
- Nucleic acid
- Stored as Fat
- Laxative
Lipids (Fats and Oils)
Organic compounds Carbon = 77% Hydrogen = 12% Oxygen = 11% (Percentage of molecular weight) Insoluble in water; soluble in ether
Room temperature?
- Solid
Digestibility
Structure of fat
Glycerol + 3 fatty acids
Energy content of fat and starch?
Higher than CHO
1 g of FAT = 9.45 Kcals gross energy
1 g of STARCH = 4.2 Kcals of gross energy
Fat = 2.25 times more energy than starch
What is energy? (Calorie)
Calorie = amount of heat required to
increase the temperature of 1 g of
water one degree Celsius
(specifically from 14.5 to 15.5)
Fatty Acids
Chain of C atoms; 2 to 24
Carboxyl (COOH) group
Methyl group (CH3)
Saturated Fatty Acid
- No double bonds
- Higher melting point
- Animal fat (tallow, lard)
- more energy = more hydrogen
Unsaturated
- Double bonds
- Lower melting point
- Vegetable oils
Stearic acid
(C18:0)
Oleic acid
(C18:1)
Linoleic acid
(C18:2)
Linolenic acid
(C18:3)
Arachidonic acid
(C20:4)
3 essential fatty acids
Linoleic acid Linolenic acid Arachidonic acid do not synthesize in body * need for proper body functions - development stage and health conditions
7 Functions of Fat
- Energy
- Heat Insulation
- Body protection (skin maintenance)
- Cell Membranes
- Hormone precursor (prostaglandins)
- Immune Function
- Carrier of fat soluble nutrients (vitamins)
Protein
Organic compound Carbon = 53% Hydrogen = 7% Oxygen = 23% Nitrogen = 16% Sulfur and phosphorus = < 1%
Where is protein found in plants?
the growing and reproductive parts or body organs and soft structures
Synthesizing amino acids by plants and animals
plants can convert amino acids
but animals can not
10 Essential amino acids
PVT MAT HIL
Ten Essential Amino Acids
- Arginine
- Histidine
- Isoleucine
- Leucine
- Lysine
- Methionine
- Phenylalanine
- Threonine
- Tryptophan
- Valine
taurine
Protein Functions (2)
- Basic structural unit of body tissue
2. Body metabolism
5 things included with the basic structural unit of body tissue
- Collagen (connective tissue)
- Contractile Proteins
- Keratins (hair, hooves)
- Growth of new tissues
- Repair of tissue
4 things involved with body metabolism
- enzymes
- hormones
- antibodies
- energy via deamination
What is Urea?
% of crude protein?
% of N?
It is a waste product; end product of metabolism
281% CP
45% N
Can feed back to a ruminant because they contain microbes to convert to amino acids
No nutrition value alone
High energy diet
Biological Value
(also known as Nutritive value)
what does BV100 mean
Desired amount and ratio of essential aa’s to meet the animals requirement
BV 100 means all of the digested protein is used for metabolism
High Quality
What is a protected protein?
proteins that pass through with out changing it
Microbes will not act on or change them
Key facts about Ruminants
Differ in dietary protein requirements
Microbial synthesis of aa
Process
Convert inferior proteins and NPN
What is important for a protein to function correctly?
Structure is critically important for function
**a protein must be folded correctly to function properly
Prions
“Infectious”; abnormal shape
- how proteins fold; can be infectious
Host’s normal proteins to refold
Transmissable spongiform
encephalopathies
Neurological diseases; fatal
Essential Amino Acids do what?
alter to form new AA’s combined together
NPN means?
non-protein nitrogen
Characteristics of minerals?
Solid, crystalline elements Inorganic 3 to 5% of animal body Ca = 50% P = 25% All others = 25%
Mineral Classification
15 Perform essential functions - Macrominerals Ca, P, Mg, Na, Cl, K and S - microminerals Fe, Cu,I, Zn, Se, Mn, and F
Functions of Calcium
- Skeletal growth
- Blood Clotting
- Enzyme activation
- Muscle Contraction
Calcium deficiency symptoms
- Ricketts
- Slow growth
- Osteomalacia; Softening of bone
- Tetany
- Thin shelled eggs
Functions of Phosphorus
- important for skeletal growth
- component of enzyme systems
- release of body energy (ATP)
- part of DNA, RNA, and cell membranes
Phosphorus deficiency symptoms
- rough hair coat
- pica; eating non food material (this means you are lacking P)
- reduced appetite
- Slow growth