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97 Cards in this Set
- Front
- Back
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question
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answer
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The impulse normally travels from____to the_____of a neuron
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dentrite, axon
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A simple definition of an electrical potential is
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difference in voltage
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What significant event occurs within the neuron that results in an action potential
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ion channels are opened
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The sodium-potassium pump function to pump
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sodium ions out of the cell and potassium ions into the cell
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During one cycle the sodium potassium pump binds and moves
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3 Na+ and 2K+
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The sodium-potassium pump is a trans membrane protein
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TRUE
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Why does the nervous impulse travel faster when the nerve is covered with myelin
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the action potential "skips" over the myelin
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Which type of wave carries the most energy
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high amplitude waves
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If a wave has a wavelength of 4m and a frequency of 50Hz what speed is the wave traveling at
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200m/s
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WHen superimposing waves, if two waves'crests align this causes_____
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constructive interference??
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Light is converged by a double convex lens principally by
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refraction
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When a beam of light falls obliquely on a glass surface after passing through air it is
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bent toward the perpendicular to the surface
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Myopia is corrected by the use of concave/divergent lens
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TRUE
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The maximum displacement of a vibration from equilibrium is called
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amplitude
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sound is
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a mechanical wave. Pressure and longitudinal
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light is an
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electromagnetic wave
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amplitude
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the maximum distance the particle travels from its place
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Speed formula
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wavelength x frequency
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Doppler effect
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a shift in the apparent frequency for a sound wave produced by a moving source.
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intensity
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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)
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intensity of current
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Amperage. It is measured in amperes/amps (A).
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Micro-Amp
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small current, can not produce a muscle current
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milli amp
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can produce a muscle contraction
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microcurrents
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catalyzes the body to improve Qi and Blood circulation and accelerates its cellular self-healing mechanism with minimal energy input. “Less is more.”
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electric current flows
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from a high charge to a low charge
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current
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#ERROR!
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resistance
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the hindrance of the flow to the charge
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series
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are connected along a single path, so the same current flows through all of the components.
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parallel
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are connected so the same voltage is applied to each component.[3]
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Gamma rays
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have the shortest wavelengths. highest frequency
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ultraviolet radiation
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has wavelengths about the size of a virus. Vit. D is formed under the UV radiation with 280 nm.
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infared wavelengths
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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.
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radio waves
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are longer than 1 millimeter. Since these are the longest waves, they have the lowest energy and are associated with the lowest temperatures.
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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
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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.
|
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wavelength distance
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between 2 similar configurations
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frequency
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number of crests that pass a given point per second
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diffraction
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a wave bends around a partial obstruction
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reflection
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waves are reflected at boundries between media
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refraction
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a wave passes from one medium to another it changes speed
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Does light travel better through air or water?
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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
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Does sound travel faster in air or water?
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Water. It's a more dense medium; energy is transferred more efficiently.
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myopia
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is the inability of the eye to focus on distant objects
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myopia and refraction
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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
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myopia and eyeball curvature
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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.
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hyperopia
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is the inability of the eye to focus on nearby objects
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hyperopia explained
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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.
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hyperopia lenses
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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.
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voltage
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the energy necessary to move a charge in an electric field
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electrical circuit
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a flow of charge around a closed pathway
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amperage/intensity current
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amount of charge per second
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ohm's law
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volts equals amps times ohms
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What is resting potential (electrical cell potential)
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the potential difference between the interior cytoplasm and the external aqueous medium of the living cell
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Local depolarization
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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
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What is action potential?
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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
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myelin
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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
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the ray of light approaching the mirror is known as the
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incident ray
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The ray of light that leaves the mirror is known as the reflected ray (labeled R in the diagram)
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reflected ray
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The angle between the incident ray and the normal is known as the
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angle of incidence
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The angle between the reflected ray and the normal is known as the
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angle of reflection
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from thin medium to thicker medium
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angle will be closer to the vertical
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reflection
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change in direction of light is under the same angle
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refraction
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change in direction of light is under a different angle
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myopia definition
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muscles surrounding eye contract too much and elongate eye causing myopia. TX:convex lens
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