Everything Flashcards
Recall the nutrients we need in our diets
Fats, Minerals, Vitamins, Proteins, and Carbs
Why do we need fibre?
It keeps us healthy by helping food move through the intestines and stopping them from getting blocked
Why do we need water?
Water acts as a lubricant; dissolves things so that they can be carried around the body; fulls us the cells so they hold their shape and cools you down, when you sweat. It also keeps you hydrated
Tests for starch
Iodine solution
Turns blue/black
Tests for proteins
Biuret Solution
Turns purple
Tests for fats
Ethanol
Turns cloudy
Tests for sugar
Benedict solution
Turns brick red
Good sources of fibre
Wholewheat cereals and wholemeal bread
Describe what our bodies use the different nutrients for
Fat - always a source of energy; helps to keep you warm
Carbs - main source of energy
Protein - makes new cells to help us grow and repair
Vitamins and minerals - healthy skin, eyes and bones
Kwashiorkor
Pot belly - intestines and muscles become weak to hold the stomach in
Night blindness
Lack of Vitamin A
Scurvy
Lack of Vitamin C - bad joints
Rickets
Lack of calcium and vitamin D - weak bones
Anaemia
Lack of iron - tiredness and shortness of breath
Enzymes working as catalysts in digestion
Enzymes are biological catalysts. Catalysts speed up reactions.
Bacteria benefits and drawbacks
Drawbacks - The bacteria grows and reproduces using some of these digested molecules
Benefits - The bacteria in your gut feed on your food and can digest soem foods that your body cannot
Why do your cells need to respire?
All organisms respire in order to release energy to fuel their living processes
