Question | Answer |
Reliability | The occurrence is guaranteed
E.g a clock that is out by 3 minutes, will always be 3 minutes out. This is guaranteed that despite not being accurate the time will still show only 3 minutes out. |
Validity | Is it testing what you think your testing |
Independent Variables | The changed/altered part of an experiment in order to complete the experiment. (There should only be one independent variable for a valid experiment) |
Dependent variables | What changes when the independent variable changes. The dependent variable changes in accordance with the outcome of the independent variable |
The name for a Liquid that dissolves substances | A Solution |
Mixture that settles out quickly | A Suspension |
What is an emulsion | A mixture of two or more immiscible(unblendable) liquids |
What is the name of a solid and liquid mixture evenly dispersed, however not dissolved in one another that settles over a lengthy time | A Colloid |
An example of a surfactant is | Soaps and detergents |
Surfactant | A surfactant is a group of chemicals that are SURFACE ACTIVE AGENTS. They affect the surface tension of a liquid |
What are the two types of emulsions | Oil in water
and
Water in oil |
Substances that Decompose in the environment | Biodegradable |
Naturally occurring organisms on skin | Bacteria |
3 Main properties of skin | 1: Waterproofing
2: Temperature control
3: Protects against disease causing bacteria |
Skin pH measured on a scale of 0-14 | 4.5 - 6 - Slightly acidic |
pH is a measure of | Acidity |
What is the Menisci | the upward curvature of e.g. water in a test tube |
2 main solvents in medications are | 1: Water
2: Alcohol |
Why are water and alcohol used as solvents | Water: Used with substances that need to flow as it is a highly soluble substance
Alcohol is used as an alternative to water and is better used for fatty and oily substances that water has a harder time dissolving |
Stomach pH level | between 0.5 and 2 (acidic) |
Roles of stomach | Secretes Gastric juice to dilute acid
Muscular layers churn and digest food |
pH of the small intestines | roughly 8 (alkaline) |
Role of small intestines | To Secrete digestive enzymes
digest fats
Products of digestion are absorbed into bloodstream |
Tablets that dissolve in the small intestines | Enteric coated tablets |
Fat soluble vitamins | A,D,E,K ( remember as a word it helps) ADEK |
Water soluble vitamins | B!, B2, B12 and C ( remember all the B's count 1 and 2 than put them together for 12 and than think oranges :P ) |
3 ways for drug administration | Orally
Inhalation
Injection |
SA node or Sinoatrial node | Specialized cells in the right atrium of the heart, send electrical impulses causing the heart to beat |
UHMWPE | Ultra High Molecular Weight polyethylene and is used in Large replacement joints |
The medical procedure when using a balloon to inflate hardened arteries is called | Balloon angioplasty |
What types of synovial joints do elbows and knee joints classify as | Hinge joints |
Non invasive medical techniques are | When no physical infiltration is required |
Minimally invasive medical techniques are | when Next to none or little physical infiltration is required. Quick recovery times |
Biomedical implants must be | Bio compatible, highly durable, flexible and as lightweight a possible |
Heart valve disease where blood flow is limited to the body is called | atherosclerosis |
The job of the Skeleton system | 1: To sustain movement
2: To hold muscle in place
3: protect organs and holds organs in place |
Ligaments | Bone to Bone
or
Bone to cartlidge |
Tendons | Attach muscle to bone |
Vlaves ( in the heart ) | Ensures one way flow of blood. prevents blood backflow during contractions |
Ball and cage valve | A substitute heart valve. |
The circulatory system | Transports food, water, oxygen and blood in and out of cells |
Life support systems | Defibrillator
Heart Lung machine
IV's
Antibiotics etc... |
Hearts double beat sound (bah bump) | The process of two separate valves functioning.
one flows to and from the respiratory system.
the other flows to and throughout the circulatory system. |
Two causes (medical) for irregular heartbeat | Tachycardia
and
Brachicardia |
Superalloys | Superalloys are a combination of several different metal components and plastics used to create a stronger and more durable material |
Cemented and non cemented joints | Cemented: To use an Specific type of "glue" and bolts etc to literally cement the joint in place
Uncemented: The joint is hammered into place causing trauma to the bone this causes it to grow rapidly into the porous surface. This creates a stronger bon |
A solvent | A liquid that a solute dissolves in. |
Oil is immiscible in water unless using an emulsifier which works by | Surrounding the oil globules |
Gas in liquid colloids | e.g Foam |
Solid in Gas | e.g Smoke |