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47 Cards in this Set

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Suspension
-Particles do not dissolve but mix uniformly
-Will settle into two layers
-Heterogeneous (different)
3 properties of surfactants
-Lower surface tension
-Emulsify the dirt with water
-Alkaline (more useful in removing dirt)
Solvent
The substance that dissolves a solute
Biodegradability is .....
The breakdown of carbon compounds by micro organisms.
The Aust. standard is 80% breakdown in 21 days and complete break down in 28.
An oil-in-water emulsion is...
Oil dispersed in water
eg. Milk, mayonnaise
Polar
Water loving or hydrophillic
A water-in-oil emulsion is...
Water dispersed in oil
Eg. Butter, cosmetics
An emulsifier is added to reduce the difference in
Surface tension
Give an example of a surfactant
Detergents, washing powders, surface cleaners
Draw how a detergent removes grease from a surface
.
What substance is known as the universal solvent?
Water
Skin occupies 1.9m2. It has 4 functions
1.Secretory organ
2.Protection
3.Allows sunlight through
4.Contains sense organs
Colloid
A group part way between solutions and suspensions
Name the three products that are added in the duodenum of the small intestine.
Pancreatic juices
Bile
Intestinal juices
Name 4 Chemical groups
Surfactants, Degreasers, Lubricants, Pesticides, Solvents, Metal Cleaners, Body Hygiene Chemicals and Cosmetics, Pharmaceuticals
Detergents are made from which two chemicals?
Sulfuric acid and petrochemicals
Solution
-1 substance dissolved in another
-Solute + Solvent = Solution
-Homogenous (the same)
Bile is responsible for breaking down ....
Fats
Describe the Tyndall effect?
Light is visible when it passes through a colloid or suspension but not a solution.
The muscular contractions that help food move through the oesophagus, stomach and small intestine.
peristalsis
What is a poison?
A toxic substance that impairs normal senses or injures body organs
Solute
The substance that dissolves
Name the 3 layer present within the skin
Epidermis
Dermis
Subcutaneus layer
What is an emulsifier?
An agent that helps two substances mix together.
Eg. oil and water dont mix, Add egg yolk and they do
How does the human body conserve heat?
-Blood vessels contract
-Shivering
-Goose pimples
What is surface tension?
The forces that give water its distinctive droplet shape.
The attraction is between molecules over a short distance and are weak.
Food enters the digestive system in the __________ and is mixed with saliva from the __________________.
Mouth

Salivary Gland
Detergents were first made in...
France in 1831
3 Types of hair produced by the body
1.Lanugo
2.Vellus
3.Terminal
Hair is made of what substance?
Hint: It also makes your skin and nails
Keratin
Fat soluble vitamins contain many _______ bonds and are ____________ by the body
Non polar

stored
Swallowed drugs can be taken in two main forms:
1.Capsules
2.Tablets
Draw the shape of the meniscus in three varying tube widths
.
Non polar
Water fearing or hydrophobic
How does the human body lose heat?
-Blood vessels dilate
-Perspire
Water soluble vitamins have many ________ bonds and are replaced __________ by the body.
Polar

Continually
Anionic surfactants..
Ionise upon dissolving to have a negative charge
Drugs that are decomposed by the digestive system are
Injected
Who were the first people to use soap?
Babylonians and ancient Egyptians
Cationic surfactants...
Ionise upon dissolving to have a positive charge
Draw a simplified diagram of the skin structure
.
4 ways drugs can be applied to the skin
Ointments
Pastes
Liniments
Jellies
Why is the skin an effective barrier against microflora populations?
It is salty, acidic and the surface is constantly breaking away
Microflora is a fancy term used to describe...
Microscopic organisms such as fungi, bacteria, algae, protozoa and viruses.
Organic solvents are dangerous because
-Inhaling the fumes can cause damage to the nose, throat, lungs and even death.
-They can be absorbed through the skin
The poisons information centre hotline number is
.
Vitamin A
Is essential for dim light vision