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BIOPHYSICS MIDTERMS > MODULE 3 SET C > Flashcards

MODULE 3 SET C Flashcards

1
Q

refers to the electrical phenomena of life processes

A

BIOELECTRICITY

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2
Q

study of electrical aspects of living things

A

ELECTROPHYSIOLOGY

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3
Q

branch of biophysics that studies the nerves

A

ELECTROPHYSIOLOGY

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4
Q

concerned with the study of the excitable tissues

A

ELECTROPHYSIOLOGY

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5
Q

specialized cells that are able to convert energy from outside stimulus into an electrical response

A

SENSORY CELLS

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6
Q

Sound vibrations in the air create ——– that pushes against hair cells moving them.

A

Pressure

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7
Q

specialized sensory cells that create a nerve impulse in response to an electric field

A

ELECTRORECEPTIVE CELLS

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8
Q

These cells are used for navigation

A

ELECTRORECEPTIVE CELLS

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9
Q

These cells are similar to muscle cells.

A

ELECTROGENIC CELLS

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10
Q

Build up strong electric charges on the surface, and used for hunting and self-defense.

A

ELECTROGENIC CELLS

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11
Q

Only mammal that has a sense of electroreception

A

platypus (Ornithorhynchus anatinus)

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12
Q

use a specialized sensory guidance system for environmental navigation, communication, and sex recognition via echolocation

A

WEAKLY ELECTRIC FISH

example: GYMNARCHUS

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13
Q

The fish has stacks of modified tissue called ————– located in a regular array along their bodies and through these maintain a consideravble electrical potential difference between the head and tail,

A

ELECTRIC ORGANS

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14
Q

TRUE OR FALSE

Eels have the unique ability to discharge both weak and strong electric current.

A

TRUE

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15
Q

Weak current: navigation: Strong current: ————————–

A

weapon and self-defense

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16
Q

force field that exists whenever an electric force acts on a charge

A

ELECTRIC FIELD

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17
Q

a region of space at every point of which an appropriate test object would experience a force

A

FORCE FIELD

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18
Q

referred to as voltage

A

ELECTRIC POTENTIAL DIFFERENCE

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19
Q

It is equal to the work per unit charge required to move a positive test charge from one point to another

A

ELECTRIC POTENTIAL DIFFERENCE

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20
Q

amount of net charge passing through a section of the conductor per unit time. It is the time rate flow of net charge

A

ELECTRIC CURRENT

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21
Q

Explores the electrophysiology and mechanics of the senses: seeing, hearing, touch, balance, smell and taste

A

SENSORY BIOPHYSICS

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22
Q

how proteins in the eye respond to different energies of light, how electrical signals from the retina are transmitted to th ebrain, and how muscles move the eye, focus the eye and adjust the amount of light entering the eye

A

SENSORY BIOPHYSICS IN VISION

23
Q
A
24
Q

It refers to size and the unit of distance

A

wavelength

25
Q

It refers to the energy or the number of vibrations

A

FREQUENCY

26
Q

branch of science and technology that is devoted to production, transmission, control, processing, transformation, reception, and interaction with material media of sound, ultrasound and infrasound

A

ACOUSTICS

27
Q

A longitudinal wave that consists of sequence of pressure pulses or an elastic displacement of the material, whether gas, liquid, or solid, is called an

A

ACOUSTIC WAVE

28
Q

the individual particles vibrate back and forth along the direction in which the wave travels

A

Longitudinal or compressional wave

29
Q

The compressed portion of the wave or where the particles vibrate in the direction of wave propagation

A

COMPRESSION OR CONDENSATION

30
Q

Wave with frequencies over 20000Hz, which is about the upper limit of human hearing; High energy and rectilinearity of propagation

A

ULTRASONIC WAVES

31
Q

longitudinal waves with frequencies below the audible range (less than 20Hz); has strong vibrations, and characterized by an ability to cover long distances and circumnavigating obstacles with little dissipation; generated by nature, e.g. earthquakes, hurricanes, wind, thunder, etc.

A

INFRASONIC WAVES

32
Q

longitudinal waves that lie within the range of sensitivity of the human ear, approximately 20 to 20 kHz.

A

SOUND WAVES

33
Q

Three Aspects of Sound

A

Vibrating Source
Elastic Medium
Receiver (ear)

34
Q

Characteristics of Sound

A

Pitch
Quality or Timbre
Loudness

35
Q

vibrating object which sends the disturbance through the surrounding medium

A

Vibrating Source

36
Q

Elastic Medium

A

which transmits the disturbance from the source to the receiver in the form of compressional/longitudinal waves.

37
Q

where the sensation of sound is produced

A

Receiver or ear

38
Q

the rate at which vibrations are produced

A

Pitch

39
Q

depends upon the
frequency of a sound source

A

Pitch

40
Q

sound of irregular vibration or that has no definite range of frequencies

A

Noise

41
Q

determined by the number and relative intensities of the superposition of harmonic waves

A

Quality or Timbre

42
Q

It is also depending on the presence of overtone

A

Quality or Timbre

43
Q

TRUE OR FALSE

A high-pitch sound has a high vibration frequency, while a low-pitch sound has a low vibration frequency

A

TRUE

44
Q

amount of auditory impression or sensation that we get from a sound

A

LOUDNESS

45
Q

describes the amplitude of vibrations the sound induces in the eardrums and the magnitude of the pressure variation caused by sound waves

A

LOUDNESS

46
Q

For a given frequency the loudness of a sound is closely related to the

A

INTENSITY OF SOUND

47
Q

FORMULA OF Temperature Dependence of the Speed of Sound in Air

A

𝒗𝑻 = 𝟑𝟑𝟏 + 𝟎. 𝟔 T

48
Q

perceived by the ear as loudness

A

INTENSITY OF SOUND

49
Q

referred to as the threshold of hearing

A

INTENSITY_0 = 1 x 10^( -12) W/m^(2)

50
Q

Threshold of pain

A

1.0 W/m^(2)

51
Q

defined as the power transported across unit area perpendicular to the direction of energy flow

A

intensity

52
Q

used for comparing intensity of one sound and the intensity of a reference sound

A

Intesity level (beta)

53
Q
A

BIOPHYSICS MIDTERMS (3 decks)

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