Life Flashcards
Processes
What is the word equation for aerobic respiration?
Glucose + Oxygen → Carbon Dioxide + Water + Energy
From which system does the body obtain glucose for respiration?
The digestive system
In which part of our cells does respiration mainly occur?
in the mitochondria.
What are the products of respiration?
carbon dioxide and water.
How do we test for carbon dioxide?
limewater, turns cloudy
The word ‘aerobic’ indicates the presence of which gas?
oxygen.
Which unit is energy measured in
joules, J
Symbol for kilojoule
kJ (lower case k, uper case J)
If food is high in energy, what nutrient is it likely to contain
fats/lipids, carbohydrates
7 nutrients needed by the body
Lipids/fats, carbohydrates, vitamins, fibre, water, protein, minerals
What nutrient repairs muscles
Protein
Why do we need fibre?
Add bulk to food to help it pass through the digestive system; prevents constipation
Scurvy happens when?
Vitamin
C deficiency
2 soutces of vitamin C
Fruits and vegetables
Rice, potatoes and bread are sources of
Carbohydrates
Meat, fish, nuts are good sources of
Protein
Sugar and starch are types of
Carbohydrates
Test to detect starch is?
Iodine
When testing for starch what colour change shows a positive result
Brown or black
Test to detect sugar
Benedicts
When testing for sugar what colour change shows a positive result
Blue or red
Test to detect protein
Bieuret
When testing for protein what colour change shows a positive result
Blue of purple
Test to detects fats
Ethanol
