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47 Cards in this Set
- Front
- Back
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Suspension
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-Particles do not dissolve but mix uniformly
-Will settle into two layers -Heterogeneous (different) |
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3 properties of surfactants
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-Lower surface tension
-Emulsify the dirt with water -Alkaline (more useful in removing dirt) |
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Solvent
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The substance that dissolves a solute
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Biodegradability is .....
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The breakdown of carbon compounds by micro organisms.
The Aust. standard is 80% breakdown in 21 days and complete break down in 28. |
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An oil-in-water emulsion is...
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Oil dispersed in water
eg. Milk, mayonnaise |
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Polar
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Water loving or hydrophillic
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A water-in-oil emulsion is...
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Water dispersed in oil
Eg. Butter, cosmetics |
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An emulsifier is added to reduce the difference in
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Surface tension
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Give an example of a surfactant
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Detergents, washing powders, surface cleaners
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Draw how a detergent removes grease from a surface
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.
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What substance is known as the universal solvent?
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Water
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Skin occupies 1.9m2. It has 4 functions
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1.Secretory organ
2.Protection 3.Allows sunlight through 4.Contains sense organs |
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Colloid
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A group part way between solutions and suspensions
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Name the three products that are added in the duodenum of the small intestine.
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Pancreatic juices
Bile Intestinal juices |
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Name 4 Chemical groups
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Surfactants, Degreasers, Lubricants, Pesticides, Solvents, Metal Cleaners, Body Hygiene Chemicals and Cosmetics, Pharmaceuticals
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Detergents are made from which two chemicals?
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Sulfuric acid and petrochemicals
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Solution
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-1 substance dissolved in another
-Solute + Solvent = Solution -Homogenous (the same) |
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Bile is responsible for breaking down ....
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Fats
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Describe the Tyndall effect?
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Light is visible when it passes through a colloid or suspension but not a solution.
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The muscular contractions that help food move through the oesophagus, stomach and small intestine.
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peristalsis
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What is a poison?
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A toxic substance that impairs normal senses or injures body organs
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Solute
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The substance that dissolves
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Name the 3 layer present within the skin
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Epidermis
Dermis Subcutaneus layer |
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What is an emulsifier?
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An agent that helps two substances mix together.
Eg. oil and water dont mix, Add egg yolk and they do |
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How does the human body conserve heat?
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-Blood vessels contract
-Shivering -Goose pimples |
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What is surface tension?
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The forces that give water its distinctive droplet shape.
The attraction is between molecules over a short distance and are weak. |
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Food enters the digestive system in the __________ and is mixed with saliva from the __________________.
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Mouth
Salivary Gland |
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Detergents were first made in...
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France in 1831
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3 Types of hair produced by the body
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1.Lanugo
2.Vellus 3.Terminal |
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Hair is made of what substance?
Hint: It also makes your skin and nails |
Keratin
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Fat soluble vitamins contain many _______ bonds and are ____________ by the body
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Non polar
stored |
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Swallowed drugs can be taken in two main forms:
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1.Capsules
2.Tablets |
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Draw the shape of the meniscus in three varying tube widths
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Non polar
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Water fearing or hydrophobic
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How does the human body lose heat?
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-Blood vessels dilate
-Perspire |
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Water soluble vitamins have many ________ bonds and are replaced __________ by the body.
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Polar
Continually |
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Anionic surfactants..
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Ionise upon dissolving to have a negative charge
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Drugs that are decomposed by the digestive system are
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Injected
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Who were the first people to use soap?
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Babylonians and ancient Egyptians
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Cationic surfactants...
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Ionise upon dissolving to have a positive charge
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Draw a simplified diagram of the skin structure
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4 ways drugs can be applied to the skin
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Ointments
Pastes Liniments Jellies |
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Why is the skin an effective barrier against microflora populations?
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It is salty, acidic and the surface is constantly breaking away
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Microflora is a fancy term used to describe...
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Microscopic organisms such as fungi, bacteria, algae, protozoa and viruses.
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Organic solvents are dangerous because
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-Inhaling the fumes can cause damage to the nose, throat, lungs and even death.
-They can be absorbed through the skin |
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The poisons information centre hotline number is
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.
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Vitamin A
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Is essential for dim light vision
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