Mid Terms Flashcards
Photosynthesis
The process where plants use sunlight to synthesize nutrients from carbon dioxide and water
Formula for photosynthesis
CO2 + H2O = carbohydrate + O2
Visible fats
Easy to detect in food
Eg. Fat on meat, butter, oil
Essential fatty acids
Linoleic acid and linolenic acid are essential fatty acids and mainly found in plants used for brain development in babies
Functions of carbohydrates
1 most important source of energy
2 acts as a protein sparer
3 prevents ketosis bby allowing fatty acids to be used efficiently
4 is used as glucose and stored in the liver as glycogen
5 provides sweetness
Helps promote weight loss
Sources of carbohydrates
Vegetables, provisions, cereals, legumes fruit, sugary foods and juices
Functions of fat
Surrounds and protects organs, provides source for fat soluble vitamins, stores energy, regulate temperature
Sources of fat
Plants and animals
Functions of vitamin b1
Involved in metabolic reactions, required for growth, functions and maintains nerves
Sources of vitamin b1
Cereals,legumes, lean pork
Functions of iron
1 is a component in hemoglobin
2 component of myoglobin
3 needed for reactions involving energy formation
Sources of iron
Meat, dark leaf greens, dried fruits
Functions of water
Vital to life, removes waste, maintains blood volume
Sources of water
Nearly in all foods
Digestion of a burger
First the burger is chewed this is mechanical digestion salivary amylase then begins to break down the carbohydrates into Maltose the food is then swallowed and carried to the stomach where is is churned and the breaking does of protein has began by Pepsin into dipeptides and amino acids
Monosacchride
the common base units where other carbohydrates are built
Fructose (monosacchride)
Found in fruits
Glucose(monosacchride)
Found in fruits and vegetables used for energy
Galactose(monosacchride)
Food in milk
Disacchrides
Made up of two monosacchride units
Sucrose
Fructose+ glucose
Found in fruits, vegetables and sugars
Lactose
Galactose+ glucose
Found in milk
Maltose
Glucose+glucose
Found in cereals
Polysaccharides
Formed from a vary number of monosacchrides
When you eat to much carbohydrates
Obesity, dental carries, health of gi tract
Effect of heat on sugar(dry )
Melts, caramelized,burns, leaves back residue
Effect of heat on sugar (wet)
Dissolves, syrup, caramelized,burns when water evaporates
The water soluble vitamins
Vitamins b and c
Fay soluble vitamins
A,D,E,K
Lack of water
Dehydration,headache,fatigue, confusion
Effects of heat on fat
Melts, oil thins and bubbles, blue haze then smoke, ignites rapidly burns
