Chap 17 - IT Flashcards
Alternating current (AC)
Current that changes direction to complete circuit.
Ampere
A unit measuring the amount of energy passing a given point in a stated period of time.
Amplitude
The height of the wave
Atom
A discrete unit made of matter consisting of charged particles
Boiling point
The temperature of a substance when its state changes from solid to liquid
Central Processing unit (CPU)
The component of a computer that contains the memory, power controls circuitry
Circuit
The path of free electrons as they move through a conductive material.
Coherent light waves
Light waves that are lined up so that the troughs peaks are matched
Conduction
Transfer of heat from one substances to another by the natural movement of the molecules, which sets other molecules in motion.
Conductivity
The relative ability of a substance to transmit free electrons or electricity
Convection
Displacement of cool air by warm air.
Database
A compilation of information, usually lists or numerical information that can be manipulated or calculated.
Direct current (DC)
Low-voltage electrical current in which electrons flow in one direction to complete a circuit.
Doppler effect
- The effect perceived when the origin or receiver of sound waves moves.
- The perception is a change in the frequency of the waves & corresponding pitch.
Doppler Ultrasound
A medical device that uses the Doppler effect ultrasonic waves to measure and record blood flow as well as tissue density shape.
Electromagnetic waves
The natural phenomenon of wave energy, such as electricity, light radio broadcasts. The type of energy is determined by the frequency of the waves
Element
A pure substance composed of atoms, each with the same number of protons (e.g., iron, copper, uranium).
Focal point
The exact location where light rays converge after passing through a convex lens
Frequency
The number of waves that pass a point in 1 second, measured in hertz (Hz).
Gravitational energy
The natural attractive force of masses in the universe
Harmonics
The quality of sound related to the frequency of the sound waves
Hotwire
Carries the electrical current
Hyperlink
- Electronic link between files and electronic addresses.
* Allow easy and quick data retrieval from another network computer
Insulator
- Substance that does not conduct electrical current.
* Used to prevent electricity to seek another path.
Internal drives
Internal data storage devices of the computer
Internet
- A worldwide public network of computers; connected by fiber optics, satellite signals or wires.
- Connected computers and receive and transmit data to other computers on the system.
Intranet
- Computer network within facility or an organization.
* Can be accessed only by authorized personnel.
Isotope
An atom of a specific element č the correct number of electrons & protons, but different neutrons.
What is the patient-centered care?
Assessment, Planning & Interventions on the patient as an individual.
What does Maslow’s chart teach us about the needs of individuals
The most basic requirement for life must be fulfilled in order for the higher levels to be achieved.
Kinetic energy
Energy of motion.
Magnetic field
3D force pattern created by + charges of a polar magnet
Molecule
Specific substance made up of elements that are bonded together.
Momentum
Mathematical relationship between the weight and velocity of a mass
Neutron
- Subatomic particle located in the nucleus of the atom.
* NO electrical charge.
Nucleus
Centre of an atom
Periodic table
Standardised chart of all known elements
Photon
Name given to a light particle.
Potential energy
Energy stored in form of gravity, chemical bonds, nuclear particles & mechanical springs.
Receptacle
- An outlet in an electrical circuit.
* Receives a plug containing live current, completing the circuit
Reflection
•Behaviour of a wave when it reaches a nonabsorbent material. The wave reverses and is directed back toward the source
Refraction
Behaviour of light, when it passes through a substance
Resistance
The measurement of substance ability to inhibit the flow of electricity
Serial lenses
An optical system in which several lenses are lined up to produce a clear, well-defined image. Surgical endoscopes use serial lenses.
Solid
- State of matter in which the molecules are bonded very tightly.
- Characteristics of solids are hardness & the ability to break apart into other solids.
4 States of Physical matter
i. Solid.
ii. Liquid.
iii. Gas.
iv. Plasma
Static electricity
Buildup of charged particles on a surface
Thermal conductivity
- Ability of a substance to conduct heat.
* Different substances have different abilities to conduct/transmit heat.
Thermoregulation
Complex physiological process in which the body maintains a temperature that is optimal for survival
Ultrasound
- Technology that uses high frequency wave energy to identify anatomical structures and anomalies (abnormal).
- Waves are transformed into visual images on screen.
Voltage
Electrical force in circuit. Measured in Volts (V).
Wave
Natural phenomenon in which energy is transmitted in the forms of peaks (high points) and troughs (low points).
Wavelength
Distance between peaks in a complete wave cycle
World Wide Web
A network of links to data via Internet system, using special computer language protocol.
List and define five areas of study in mechanics & physics.
a. Optical Physics - Any device č lens (operating microscopes, endoscopes, lasers) - Equipment that emits light (fiber optic light source). - Devices that produce an optical (not electronic) image.
b. Thermodynamics - Device that creates heat or cold (fluid warmer, patient thermal, devices, sterilizers).
c. Classic mechanics - Any instrument or device that oscillates, rotates, flexes, pivots, bends or flexes.
- Any instrument or device that uses wave energy, such as light, energy, heat & sound.
d. Biomechanics - The principles of mechanics are used to explain & improve the functions of the human body.
e. Particle, atomic physics - Any device that uses electromagnetic radiation in the form of heat, light or electricity (Ultrasound Dx device, Radiography, Fluoroscopy).
What is “A” drive used for?
CD (Not Disk)
What is “C” drive used for?
Hard drive
What is not a screen resolution?
300 x 500
Ctrl and =
Subscript Text
Fn keys do what?
Shortcuts
F7 does what?
Spell check
How do you access visited internet websites?
History
Favourite
Where does MS word save documents?
My documents
.org
Non-profit
.gov
Government
Always use what sight for email?
@
What do you use to protect electrical components?
Surge Protector.
