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97 Cards in this Set

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question
answer
The impulse normally travels from____to the_____of a neuron
dentrite, axon
A simple definition of an electrical potential is
difference in voltage
What significant event occurs within the neuron that results in an action potential
ion channels are opened
The sodium-potassium pump function to pump
sodium ions out of the cell and potassium ions into the cell
During one cycle the sodium potassium pump binds and moves
3 Na+ and 2K+
The sodium-potassium pump is a trans membrane protein
TRUE
Why does the nervous impulse travel faster when the nerve is covered with myelin
the action potential "skips" over the myelin
Which type of wave carries the most energy
high amplitude waves
If a wave has a wavelength of 4m and a frequency of 50Hz what speed is the wave traveling at
200m/s
WHen superimposing waves, if two waves'crests align this causes_____
constructive interference??
Light is converged by a double convex lens principally by
refraction
When a beam of light falls obliquely on a glass surface after passing through air it is
bent toward the perpendicular to the surface
Myopia is corrected by the use of concave/divergent lens
TRUE
The maximum displacement of a vibration from equilibrium is called
amplitude
sound is
a mechanical wave. Pressure and longitudinal
light is an
electromagnetic wave
amplitude
the maximum distance the particle travels from its place
Speed formula
wavelength x frequency
Doppler effect
a shift in the apparent frequency for a sound wave produced by a moving source.
intensity
In summary, the combination of the three amplification components: the tendons, the relative sizes of the membranes, and the tympanic cavity itself can amplify sounds up to 38dB before they enter the inner ear - a huge factor when one notes that the measurements of decibels is logarithmic. (10,000 times)
intensity of current
Amperage. It is measured in amperes/amps (A).
Micro-Amp
small current, can not produce a muscle current
milli amp
can produce a muscle contraction
microcurrents
catalyzes the body to improve Qi and Blood circulation and accelerates its cellular self-healing mechanism with minimal energy input. “Less is more.”
electric current flows
from a high charge to a low charge
current
#ERROR!
resistance
the hindrance of the flow to the charge
series
are connected along a single path, so the same current flows through all of the components.
parallel
are connected so the same voltage is applied to each component.[3]
Gamma rays
have the shortest wavelengths. highest frequency
ultraviolet radiation
has wavelengths about the size of a virus. Vit. D is formed under the UV radiation with 280 nm.
infared wavelengths
span from the width of a pinpoint to the size of small plant seeds. At a temperature of 37 degrees C, our bodies radiate with a peak intensity near 900 nanometers.
radio waves
are longer than 1 millimeter. Since these are the longest waves, they have the lowest energy and are associated with the lowest temperatures.
question
answer
The impulse normally travels from____to the_____of a neuron
dentrite, axon
A simple definition of an electrical potential is
difference in voltage
What significant event occurs within the neuron that results in an action potential
ion channels are opened
The sodium-potassium pump function to pump
sodium ions out of the cell and potassium ions into the cell
During one cycle the sodium potassium pump binds and moves
3 Na+ and 2K+
The sodium-potassium pump is a trans membrane protein
TRUE
Why does the nervous impulse travel faster when the nerve is covered with myelin
the action potential "skips" over the myelin
Which type of wave carries the most energy
high amplitude waves
If a wave has a wavelength of 4m and a frequency of 50Hz what speed is the wave traveling at
200m/s
WHen superimposing waves, if two waves'crests align this causes_____
constructive interference??
Light is converged by a double convex lens principally by
refraction
When a beam of light falls obliquely on a glass surface after passing through air it is
bent toward the perpendicular to the surface
Myopia is corrected by the use of concave/divergent lens
true.The cure for the nearsighted eye is to equip it with a diverging lens. Since the nature of the problem of nearsightedness is that the light is focused in front of the retina, a diverging lens will serve to diverge light before it reaches the eye. This light will then be converged by the cornea and lens to produce an image on the retina.
The maximum displacement of a vibration from equilibrium is called
amplitude
sound is
a mechanical wave. Pressure and longitudinal
light is an
electromagnetic wave
amplitude
the maximum distance the particle travels from its place
Speed formula
wavelength x frequency
Doppler effect
a shift in the apparent frequency for a sound wave produced by a moving source.
intensity
In summary, the combination of the three amplification components: the tendons, the relative sizes of the membranes, and the tympanic cavity itself can amplify sounds up to 38dB before they enter the inner ear - a huge factor when one notes that the measurements of decibels is logarithmic. (10,000 times)
intensity of current
Amperage. It is measured in amperes/amps (A).
Micro-Amp
small current, can not produce a muscle current
milli amp
can produce a muscle contraction
microcurrents
catalyzes the body to improve Qi and Blood circulation and accelerates its cellular self-healing mechanism with minimal energy input. “Less is more.”
electric current flows
from a high charge to a low charge
current
#ERROR!
resistance
the hindrance of the flow to the charge
series
are connected along a single path, so the same current flows through all of the components.
parallel
are connected so the same voltage is applied to each component.[3]
Gamma rays
have the shortest wavelengths. highest frequency
ultraviolet radiation
has wavelengths about the size of a virus. Vit. D is formed under the UV radiation with 280 nm.
infared wavelengths
span from the width of a pinpoint to the size of small plant seeds. At a temperature of 37 degrees C, our bodies radiate with a peak intensity near 900 nanometers.
radio waves
are longer than 1 millimeter. Since these are the longest waves, they have the lowest energy and are associated with the lowest temperatures.
wavelength distance
between 2 similar configurations
frequency
number of crests that pass a given point per second
diffraction
a wave bends around a partial obstruction
reflection
waves are reflected at boundries between media
refraction
a wave passes from one medium to another it changes speed
Does light travel better through air or water?
Air, as it is less dense. As light enters water is slows down causing bending. This is why object appear closer to the surface of water than they really are
Does sound travel faster in air or water?
Water. It's a more dense medium; energy is transferred more efficiently.
myopia
is the inability of the eye to focus on distant objects
myopia and refraction
But the ability to view distant objects requires that the light be refracted less. Nearsightedness will result if the light from distant objects is refracted more than is necessary
myopia and eyeball curvature
If the cornea bulges more than its customary curvature, then it tends to refract light more than usual. This tends to cause the images of distant objects to form at locations in front of the retina.
hyperopia
is the inability of the eye to focus on nearby objects
hyperopia explained
the eye requires a high curvature to focus on nearby objects. The lens' power to refract light has diminished and the images of nearby objects are focused at a location behind the retina.
hyperopia lenses
This converging lens will refract light before it enters the eye and subsequently decreases the image distance. By beginning the refraction process prior to light reaching the eye, the image of nearby objects is once again focused upon the retinal surface.
voltage
the energy necessary to move a charge in an electric field
electrical circuit
a flow of charge around a closed pathway
amperage/intensity current
amount of charge per second
ohm's law
volts equals amps times ohms
What is resting potential (electrical cell potential)
the potential difference between the interior cytoplasm and the external aqueous medium of the living cell
Local depolarization
the local potential is the depolarization of a cell below threshold. After the cell is sufficiently depolarized ( and reaches threshold), it fires an action potential down the axon
What is action potential?
a momentary change in electrical potential on the surface of a cell, especially of a nerve or muscle cell, that occurs when it is stimulated, resulting in the transmission of an electrical impulse
myelin
a fatlike substance forming a sheath around certain nerve fibers. It is related to the capacity of nerve structures for rapid transmission of nerve impulses. Various diseases, such as multiple slerosis can destroy these myelin wrappings
the ray of light approaching the mirror is known as the
incident ray
The ray of light that leaves the mirror is known as the reflected ray (labeled R in the diagram)
reflected ray
The angle between the incident ray and the normal is known as the
angle of incidence
The angle between the reflected ray and the normal is known as the
angle of reflection
from thin medium to thicker medium
angle will be closer to the vertical
reflection
change in direction of light is under the same angle
refraction
change in direction of light is under a different angle
myopia definition
muscles surrounding eye contract too much and elongate eye causing myopia. TX:convex lens