Bioligy topics

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  • Created by: Tahmena
  • Created on: 04-01-17 18:10
How is the mouth part of digestion?
When you put food in your mouth it is called ingestion and then chew the food with your teeth. After this the food gets added with saliva, which the salivary glands produce, and your tongue which is a muscle rolls your food into a ball.
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What does the esophagus do as part of the digestive system?
After the food being put in your mouth your windpipe shuts off and it passes through the esophagus which is a tissue. Then muscles in the wall of the gullet contract (contract) to narrow the tube above and pushes the food to the stomach.
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What is the role of the stomach in the digestive system?
When your food is in the stomach it is added to hydrochloric acid to kill of bacteria and fibre which can't be digested goes to the large intestine where the water is removed. They form more solid materials called faeces which is dead bacteria.
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What is the role of the small intestine in the digestive system?
In the small intestine bile pigment which makes duodenum alkaline and mixes with the food. The food then gets carried in the blood.
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What is the role of the large intestine in the digestive system?
The major function of the large intestine is to absorb water from the remaining indigestible food matter and transmit the useless waste material from the body.
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What is the role of the rectum?
Faeces are stored in the rectum and the food is eventually pushed out of the anus in a process called elimination or egestion.
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Why is pepsin secreted in it's inactive form?
Pepsin is secreted in its inactive form, pepsinogen, because it is a powerful agent for breaking down proteins and thus poses a risk both to unprotected parts of the body and itself. Pepsin is a protein compound, and laboratory samples of the enzyme.
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Bile from the liver produces duodenum .Why does the content of duodenum need to be alkaline?
Salivary amylase works best below pH 7 stomach protease works best at pH 1.6 pancreatic lipase works best at pH 8. As food passes through the stomach into the small intestine the ph has to be raised. So hydrochloric acid is acid we need to be neutra
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Give one purpose of mucus produced in the wall of the stomach.
Because it protects the stomach lining.
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The villi increases the surface area of the small intestine. Why does the small intestine need a large surface area?
It allows absorption to happen more quickly and efficiently. To get a large surface area the inside wall is lined with villi. They stick out and give a big surface area. They also contain blood capillaries to carry away the absorbed molecules.
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What are proteins used for and what happens if you don't have a lot of them?
Proteins are used for growth and repair and not having any could cause amino acid deficiency and your body won't function properly.
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What are fats used for and what happens if we don't have any?
Fats are used for energy and also insulation. If we don't have any we will get dry, bumpy skin and lacklustre hair.
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What are carbohydrates used for and what happens if we don't have enough carbohydrates?
They are used to give us extra energy from fats and not having them could make the level of sugar in blood cause 70-99mg of hypoglycemia.
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What do we need vitamins and minerals for, what happens if we don't have any?
They are used for general health and if we don't have them you get low body levels, 7 major trace: nerves, bones, teeth muscles, digestion, blood clotting can be affected.
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What is water used for and what happens if we don't have any?
Used for sweating,crying,blood and not having enough could lead to dehydration and effected weight.
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What is fibre used for and what happens if we don't get enough?
Used for preventing constipation and not having enough could cause constipation long term: obesity, high cholesterol and colon cancer.
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What could happen to someone who is underweight?
You could have an increased risk of cancers, Poor immune system, rickets ( Disease caused by vitamin D deficiency) and lack of energy.
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What could happen to someone who is overweight?
You could have an increased risk in diabetes, and increased risk of stoke (Tend, burn off).
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What are the health problems you may face with being underweight?
Getting a symptom called osteoporosis that causes to weaken bones.
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What does bacteria do in digestion?
Gut bacteria helps digest and absorb food. The most plentiful and important bacteria in the small intestine is the Lactobacillus species. Lactobacillus helps ferment indigestible carbohydrates and supports the break down of sugars and dairy's.
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Other cards in this set

Card 2

Front

What does the esophagus do as part of the digestive system?

Back

After the food being put in your mouth your windpipe shuts off and it passes through the esophagus which is a tissue. Then muscles in the wall of the gullet contract (contract) to narrow the tube above and pushes the food to the stomach.

Card 3

Front

What is the role of the stomach in the digestive system?

Back

Preview of the front of card 3

Card 4

Front

What is the role of the small intestine in the digestive system?

Back

Preview of the front of card 4

Card 5

Front

What is the role of the large intestine in the digestive system?

Back

Preview of the front of card 5
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