Biology
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- Created by: eimeart
- Created on: 08-03-15 12:45
what are the seven characteristics of living things?
Movement,Respiration, Response,Feeding,Excretion,Reproduction and Growth
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What is a tissue?
A group of similar cells
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What is an organ?
A group of tissues
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What is a system?
A group of organs
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How do you prepare a Microscope slide?
Place a drop of water on a glass slide. Place the object to be viewed on top of the water. Gently lower the cover-slip onto the slide. Avoid trapping air bubbles. Apply some drops of stain to one side of the cover-slip and draw it across the sample
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What is a balanced diet made up of?
The six constituents of a balanced diet are carbohydrates (including fibre), fats, proteins, minerals, vitimains and water.
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How do you test for starch?
Iodine turns blue-black
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How do you test for protein?
Copper sulfate and sodium hydroxide turns violet
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How do you test for reducing sugars?
Benedicts solution turns brick red (must be heated)
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How do you test for fats?
Turns brown paper translucent
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What is iron needed for?
The production of red blood cells
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What are the five stages of digestion?
The five stages of digestion are ingestion, digestion, absorbtion, assimilation and egestion.
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What is ingestion?
Ingestion is the taking of food into the mouth.
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What is digestion?
Digestion is the breaking down of food.
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What is absorption?
Absorbtion is the absorbtion of molecules of food into the blood in the small intestine
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What is assimilation?
Assimilation is the taking of food molecules from the blood into body cells.
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What is egestion?
Egestion is the passing of undigested food out of the body.
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How does the mouth aid digestion?
The mouth chews food and mixes it with enzymes, eg amylase in saliva.
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What does the oesophagus do?
The oesophagus carries food to the stomach by muscular action (peristalsis)
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What does the stomach do?
The stomach stores and churns food and mixes it with digestive juices. It also produces hydrochloric acid to kill bacteria.
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What does the liver do?
The liver produces bile to break down fats
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What does the small intestine do?
The small intestine contains enzymes to break down food. Food molecules are absorbed into the blood in the small intestine.
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What does the pancreas do?
The pancreas produces enzymes.
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What does the large intestine do?
The large intestine passes water into the blood.
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What is an enzyme?
An enzyme is a chemical which speeds up a chemical reaction in the body without being used up in the reaction
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What does an enzyme act on?
A substrate
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What enzyme is used in the digestive system?
Amylase is an enzyme which breaks down starch into maltose.
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Whats a vein?
Veins bring blood away from the heart. They have a wider lumen and thinner walls than arteries, and valves to prevent backflow of blood.
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Whats an artery?
Arteries carry blood away from the heart. they have a narrow lumen, thick walls and no valves
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Whats a cappillary?
Capillaries are thin blood vessels(1 cell thick) that allow substances to pass into and out of the blood. They join veins to arteries.
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What is blood made up of?
Plasma, red blood cells, white blood cells and platelets
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What is the Heart?
The heart is made of cardiac muscle - a type of muscle which never tires. It contracts to pump blood around the body. It consists of 4 chambers - right & left atriums, right & left ventricles.
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What is resperation?
The release of energy from food
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Other cards in this set
Card 2
Front
What is a tissue?
Back
A group of similar cells
Card 3
Front
What is an organ?
Back
Card 4
Front
What is a system?
Back
Card 5
Front
How do you prepare a Microscope slide?
Back
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