Bbc bitesize digestion and enzymes,digestive enzymes skin health spa,do probiotics help with sinus - Step 1

The catalyst in the catalytic converter in cars is a mixture of three expensive transition metal elements, platinum, palladium and rhodium. Poisonous carbon monoxide and oxides of nitrogen are converted to carbon dioxide and nitrogen.
The food we eat contains chemical energy, glucose is one of the main subunits of our food after digestion has taken place and it provides us with the energy we need to move, grow and keep warm. We can measure the energy of content of food by burning it and recording the temperature rise of the water. ATP is an immediate source of energy for your cells particularly your muscles that need it when they are contracting. Scottish Qualifications Authority Standard Grade Biology resources, including past papers and arrangements documents.
To get a big surface area, the inside wall of the small intestine is lined with tiny villi (one of them is called a villus). A mass funeral is held in Italy for 35 of the 290 people known to have died in the Italian earthquake on Wednesday. This is quite a long topic and one that has a number of sections.First of all we started by looking at NUTRITION. Here are the notes that we used in the Ambassadors session on nutrition, carbohydrates, proteins and lipids.
In one end, out the other!It can take about 24 hours for the food you eat to pass completely through your body. TOP TIP - REMEMBER THISDigestion starts in the mouth and carries on in the stomach, but most digestion takes place in the small intestine.

We also have Bitesize study guides covering many subjects at National 4 and National 5 on our Knowledge & Learning BETA website. This is an example of heterogeneous catalysis since the solid catalyst is in a different state than the reactant gases. Just as energy is released when a bond is broken, energy is needed to form the bond between ADP and Pi to make ATP.
This means that they pass through the wall of the small intestine and into our bloodstream. We identified the 7 nutritional groups and then looked more specifically at the 3 main ones: carbohydrates (sugars), lipids (fats) and protein. You might want to have a look to fill in any gaps in your own notes or as additional information which might help you in your revision. Digestion is completed in the small intestine and this is where all absorption of nutrients takes place.
If the pH or temperature varies too much from the optimum for that enzyme, the shape of the enzyme will begin to change irreversibly. They are commonly used in biological washing powder, and in the production of baby food (proteases) and diet food products (isomerase). Once in the bloodstream, the digested food molecules are carried around the body to where they are needed. If the small intestine had a thick wall and a small surface area, a lot of digested food might pass out of the body before it had a chance to be absorbed. This is stored in the rectum, the lower part of the large intestine, until we are ready to go to the toilet.

Proteins are made up of a simple chain of amino acids but they are folded and wrapped into very complex shapes.The ACTIVE SITE of the enzyme is the part that interacts with the substrate. The breakdown of starch starts here.STOMACH - Food is churned and mixed with stomach juice. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience.
Protease, lipase (the enzyme that works on fats) and amylase are all released by the small intestine and pancreas in order to complete digestion. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so. The small intestine has many folds (called villi) which increase its surface area, making absorption more efficient.LARGE INTESTINE - This is where water along with the undigested products of digestion end up. We are unable to digest cellulose, which makes the bulk of the faeces which is produced here. The rest of the waste is compacted and stored in the rectum before finally being expelled from the body through the anus.

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