science end of year topic 1
your body need energy for everything it does you need energy to move, to grow and to keep warm. Energy is being used by constantly keeping your body functioning this includes sleeping.
You get your energy from organic molecules in the food you eat. To transfer the emergy stored in food, glucose reacts with oxygen in a chemical reactioin called aerobic respiration. This reaction transfers energy to your cells. The waste of products Carbon dioxide and water are then produced when this reactioin takes place
Name the chemical reaction that transfers energy from glucose
aerobic respiration
the word equation for aerobic respiration is glucose+oxygen-->carbon dioxide and water(+energy)
State the equation for aerobic respiration
glucose+oxygen-->carbon dioxide and water(+energy)
Respiration happens in tiny structures inside your cells called mitochondria. All cells contain mitochondria but different cells contain different amounts. Muscle cells carry out lots of respiration. so they contain a large amount of the mitochondria
state where in a cell respiration occurs
mitochondria
Glucose is a carbohydrate found in food. Digestion breaks down food into small molecules which then releases glucose molecules. These molecules are absorbed by the wall of the small intestine, into the blood stream.
Glucose is transported around your body in your blood it dissolves in the liquid part of your blood called the plasma. The dissolved glucose can diffuse into the cells that need it for respiration.
What is the liquid part of your blood named?
plasma
When you breathe in, oxygen fills the alveoli in your lungs. The oxygen then diffuses into your blood stream.
Oxygen is carried by the red blood cells in your body. These cells contain haemoglobin (the substance that makes them red) Oxygen joins the haemoglobin, and gets carried around the body in the blood vessels. When it reaches a cell requiring oxygen, the oxygen diffuses in the cell.
Name the component of blood that carries oxygen around the body
red blood cells
if carbon were to build up and stay in our body it would create a harmful level. You get rid of carbon dioxide when you exhale . Carbon dioxide produced during respiration diffueses out of your cells and into the blood plasma. The blood transports it to the lungs, where it diffuses in the air sacs then exahled.
Name the blood component that transports carbon dioxide
plasma
Aneaerobic respiration is a type of respiration that does not use oxygen, your body uses this type of respiration to transfer energey from glucose when theres int enough oxyegn for aerobic respiration to take place.
Anaerobic respiration often happens during strenuous exercise, as the body requires extra energy to be produced quickly. The body can transfer this energy for short periods of time without oxygen.
The word equations for this is
glucose--> lactic acid(+energy)
what is ther equation for anaerobic respiration
glucose--> lactic acid(+energy)