Final Exam Flashcards
Nutrition
Numerous chemical reactions and physiological processes which transform food into body tissues and activities
Nutrient
Chemicals in the diet (elements/compound) which support normal reproduction, growth, lactation and maintenance of general life processes
Essential Nutrient
Cannot be made and are required in the diet
Nonessential Nutrient
Can be made in the body, but precursors may be required through diet
Cofactors
Alter the enzymes conformation to help catalyze the reaction
Coenzyme
Organic cofactors who remove or add chemical fragments, allowing the reaction to proceed
Omnivores
An animal who eats both animal and plant orginating food stuffs
Carnivores
Animals who only eat animal food stuffs
Herbivores
Animals who only eat plant matter
Mastication
Chewing
Digestion
Large complex molecules broken down into simple, small molecules
Catabolism
1/3 processes in metabolism. The breakdown of complex materials into simple materials.
Anabolism
2/3 processes in metabolism. Synthesis of complex materials from simple materials
Catalyst
A substance which decreases the activation energy to speed up a reaction
Zymogen
The inactive form of enzymes. Activated at the time and place of required action
Activation energy
The energy required by reactants to enter the transition state by which the chemical bonds can then be broken or formed
Inhibitors
Substances that block the substrate from binding by competing for the active site.
Phagocytosis
Part of the villi engulfs the nutrients
Monosaccharide
Sugars composed of just one type of sugar
Disaccharide
Sugars composed of 2 types of sugar
Trisaccharide
Sugars composed of 3 types of sugar
Oligosaccharide
Sugars composed of a few types of sugars
Polysaccharide
Sugars composed of multiple types of sugars
Passive diffusion
Absorption along the concentration gradient that doesn’t require energy
Facilitated diffusion
Diffusion along the concentration gradient that requires a carrier protein
Active transport
Against the concentration gradient which requires energy and a carrier protein
Amylose
Carbohydrate made of α-D-glucose, straight α1-4 chains, found in plants
Amylopectin
α-D-glucose carbohydrate that uses branched α1-6 chains. e.g. Isomaltose
Cellulose
A soluble carbohydrate found in the cell wall. Undigestible in carnivores
Hemicellulose
A soluble carbohydrate found in the cell wall. Undigestible in carnivores
Glycogen
An animal carbohydrate identical to Amylopectin but with more branches
Carbohydrate
Substrates that come from photosynthesis in plants. They are a principle form of energy and primarily composed of C,H,O
Starch
Slowly digested carbohydrate in non-ruminants. Found inside the cell
Lignin
A soluble carbohydrate found in the cell wall. Non-digestible in carnivores
Amylase
Amylase is an enzyme that breaks down amylose
Lactase
Lactose -> galactose + glucose
Sucrase
Sucrose -> glucose + fructose
Maltase
Maltose -> glucose + glucose
Isomaltase
Isomaltose -> glucose + glucose
Cellulase
Breaks down cellulose
Glycogenesis
Making new glycogen from glucose
Glycogenolysis
Breakdown of glycogen to make glucose
Gluconeogenesis
Making new sugars from non-CHO’s e.g. Amino acids/VFA’s
Glycolysis
Initial breakdown of glucose
In vivo
“in the body”
In vitro
“in glass”
In situ
“in the original place”
Allosteric modifiers
These change how the enzyme works by binding to the active site, either increasing or decreasing the affinity for substrates
Regurgitation
Process by which food is sent back from the stomach to the mouth
Prehension
Getting hold of food
Deglutition
Swallowing
Insulin
A hormone in the pancreas which stimulate glucose absorption, ↓ glycogenolysis/gluconeogenesis, ↓ fat mobilisation, ↑ glycolysis/fat deposits
Glucagon
A hormone ↑ blood glucose/glycogenolysis/gluconeogenesis, ↓ glycolysis.
Epinephrine
A hormone for fight/flight. Aids in the breakdown of muscle glycogen, ↑ blood glucose/fat mobilisation, ↓ fat deposition
Glycosuria
Sugar in the urine
Polyuria
Excessive urine
Polydipsea
Excessive thirst
Ketosis
Excessive ketone production. (Post partum cows, Pre partum ewes, starved animals)
Monoglyceride
Single fatty acid
Diglyceride
2 fatty acids
Triglyceride
3 fatty acids
Saturated fatty acid
Fatty acids without double bonds
Unsaturated fatty acid
Fatty acids with at least one double bond
Essential fatty acid
Fatty acids that have to be taken in through the diet eg. Linoleic, Linolenic.
Phospholipids
Compound lipid important for cell signalling/communication
Lipoproteins
Compound lipid; carrier protein sometimes associated with cholestrol. Full of fat
HDL
High Density Lipoproteins - not much fat, pick it up and takes away
LDL
Low Density Lipoproteins - deposits fat which can lead to plaque formation