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Digestion and Respiration
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What are amino acids?
Amino acids are the small molecules that form proteins.
Name the THREE things that the chyme is mixed with when it moves into the duodenum.
1. PANCREATIC JUICE 2. BILE 3.INTESTINAL JUICE
Name two things that gastric acid contains?
1. Hydrochloric acid (HCI) 2.Pepsin.
Can you name the THREE processes that start the digestive process, taking place in the mouth?
1. Mastication 2. Insalivation 3. Deglutition.
Explain CHEMICAL DIGESTION:
food is broken down by hydrolytic enzymes which extract nutriens from the food with the help of other substances such as acids and bile
Explain MECHANICAL DIGESTION
Food is ground, cut up and mixed with digestive juices to form a paste.
Name FOUR important functions of the LIVER.
1. takes part in digestion. 2. detoxifies the blood 3. stores some vitamins, iron and glucose 4. performs a lot of metabolical reactions
What function do the intestinal villi have?
The absorption of nutrients.
What is the function of the gallbladder?
To store bile
Why is bile necessary in our bodies?
Bile is necessary for the digestion of fats.
What is the largest internal organ of the body?
Liver
Are the muscles in the digestive track voluntary or involuntary?
Involuntary
Can you explain the difference between ingestion, digestion and egestion?
INGESTION is the intake of food. DIGESTION is the mechanical and chemical break down of food EGESTION is the elimination of substances that can´t be absorbed
Can you name the THREE accessory glands?
1. salivary glands 2. liver 3. pancreas.
Can you name the SIX parts of the digestive tract?
1. mouth 2. pharinx 3. oesophagus 4. stomach 5. small intestine 6. large intestine
Name the four basic stages in the digestive process.
1. Ingestion 2. Digestion 3. Absorption 4. Egestion.
What are the two main functions of the digestive system?
1. Turns the food we eat into nutrients 2. Moves the undigested waste material out of the body
Name the three reasons why we need food to fuel our bodies.
1. Energy 2. Growth 3. Repair.
What is the main function of sweat glands?
The main function of sweat glands is temperature regulation.
Explain why humans can´t take in nutrients directly from the outside environment.
Humans are multicellular organisms, so most of our cells do not have direct access to the outside environment.
Which two processes of nutrition are related to the respiratory system?
Obtaining oxygen and eliminating carbon dioxide.
Name the four body systems are involved in the process of nutrition.
Digestive system. Respiratory system. Circulatory system Excretory system.
Why do people sneeze?
Sneezing is our body´s way of removing an irritation from our nose.
What is the name of the movement Edison observed?
Sneeze
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