1902673
Descripción
Pregunta 1
Pregunta
Acoustic (sound) Impedance Za of a substance is equal to the product of:
Respuesta
-
Density p and atomic number Z of the element - pZ;
-
Density p and velocity of sound v in substance - pv
-
Temperature T and velocity of sound v in the substance - Tv
Pregunta 2
Pregunta
The frequency of the sound is;
Respuesta
-
Physical (objective) characteristic of the sound;
-
Psycho-physical (subjective) characteristic of the sound;
-
Common term for objective and subjective characteristic of the sound.
Pregunta 3
Pregunta
The velocity of the sound is:
Respuesta
-
Physical (objective) characteristic of the sound
-
Psycho-physical (subjective) characteristic of the sound
-
Common term for objective and subjective characteristic of the sound
Pregunta 4
Pregunta
Main characteristic of the noise is:
Respuesta
-
Minimum amplitude and frequency which do not alter with the time;
-
Minimum frequency and amplitude which do not alter with the time;
-
Frequency and amplitude which continuously alter with the time.
Pregunta 5
Pregunta
In which frequency range the human ear has maximum sensitivity:
Respuesta
-
From 1000 to 3000 кНz;
-
From 1000 to 3000 МНz;
-
From 1000 to 3000 Нz.
Pregunta 6
Pregunta
The pitch of the sound is determined mainly by:
Respuesta
-
Intensity of the sound;
-
Sound pressure;
-
Sound frequency.
Pregunta 7
Pregunta
The fundamental tone f0 in a complex sound has:
Respuesta
-
Minimum amplitude and maximum frequency;
-
Minimum frequency and maximum amplitude;
-
Medium frequency and amplitude.
Pregunta 8
Pregunta
Sound can propagate in;
Respuesta
-
Vacuum;
-
Any substance;
-
Any medium through which the electromagnetic waves also propagate.
Pregunta 9
Pregunta
Sound wavelength in the hearing band is longer than that of:
Respuesta
-
Pulse Wave
-
Infrasound
-
Ultrasound
Pregunta 10
Pregunta
Reflection coefficient a2 (Alpha) of sound at the boundary between two media with sound impedance Z1 and Z2 is determined by the expression:
Respuesta
Pregunta 11
Pregunta
Which condition is least significant for sound reflection:
Respuesta
-
Transverse size of the boundary surface to be longer than or equal to sound wavelength
-
Boundary between two media with different acoustic impedance's
-
Boundary between two media with different densities
Pregunta 12
Pregunta
When our heads are submerged in water we cannot hear people because;
Respuesta
-
Sound is reflected almost completely at the water surface
-
Sound does not propagate through water
-
Our ear canals are filled with water
Pregunta 13
Pregunta
Sound wave travels across two materials with similar acoustic impedance. At the boundary surface, we expect:
Respuesta
-
Similar amounts of transmission and reflection;
-
More transmission and less reflection;
-
less transmission and more reflection;
Pregunta 14
Pregunta
Sound timbre is;
Respuesta
-
A physical (objective) feature of sound
-
Psycho-physical (subjective) feature of the sound
-
A common term objective and subjective characteristic of the sound
Pregunta 15
Pregunta
The psycho-physical law of Weber–Fehner on the sound perception is used to define the quantity:
Respuesta
-
Sound (acoustic) pressure(p);
-
Sound pitch;
-
Intensity level(Е).
Pregunta 16
Pregunta
Human hearing has a maximum sensitivity at frequencies:
Respuesta
-
from 1000 to 3000 kHz
-
from 1000 to 3000 MHz
-
from 1000 to 3000 Hz
Pregunta 17
Pregunta
The pitch of sound is determined mainly by:
Respuesta
-
Sound Intensity
-
Sound Pressure
-
Sound Frequency
Pregunta 18
Pregunta
The operating frequency hearing range is:
Respuesta
-
10 MHz - 100 MHz
-
10 kHz - 10 MHz
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10 Hz - 10,000 Hz
Pregunta 19
Pregunta
Human Frequency hearing range is:
Respuesta
-
Below 20 Hz
-
From 20 to 20,000 MHz
-
Over 20,000 Hz
Pregunta 20
Pregunta
The subjective quantity "Intensity Level E" is defined at sound frequency:
Respuesta
-
16 Hz
-
20 kHz
-
1 kHz
Pregunta 21
Pregunta
At what frequency is "Loudness L" approximately the same as "Sound Intensity Level"?
Respuesta
-
1000 Hz
-
from 16 to 20,000 Hz
-
1 MHz
Pregunta 22
Pregunta
Sound Intensity Level E is measured in units of:
Respuesta
-
Watt, W
-
Decibel, dB
-
Hertz, Hz
Pregunta 23
Pregunta
Sound Intensity Level "E" is equal to zero if:
Respuesta
-
I = Io
-
I > Io
-
I < Io
-
SIL is never 0
Pregunta 24
Pregunta
Sound Intensity Level (SIL) is proportional to the logarithm of the ratio of incoming to threshold intensity - 10*log(I/Io). During a test, incoming intensity is increased by a factor of 100. What will be the change in SIL?:
Respuesta
-
Will increase by a factor of 10 (times 10)
-
Will double (times 2)
-
Will increase with 20 dB (plus 20dB)
Pregunta 25
Pregunta
The timbre (quality) of a tone:
Respuesta
-
Decreases with loudness
-
Is proportional to the frequency
-
Is inversely proportional to the frequency
-
depends upon the overtones that are present
Pregunta 26
Pregunta
Is it possible for Humans to detect ultrasound?:
Respuesta
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Not possible
-
Yes, the blue shift is visible
-
Yes, some frequencies cause a heating sensation.
Pregunta 27
Pregunta
Is it possible for humans to detect Infrasound:
Respuesta
-
Not possible
-
Yes, the red shift is visible
-
The body can sense certain vibrations
Pregunta 28
Pregunta
Timbre is related to:
Respuesta
-
Harmonic Overtones
-
Sound from a tuning fork
-
Noise from a medical apparatus
Pregunta 29
Pregunta
The Equal-loudness contour, introduced by Fletcher-Munson in 1933, was designed to correlate sound intensity to the subjective perception of loudness. Use the graph to estimate perceived loudness (In Phons!) at frequency 100hz and sound intensity level of 50 dB
Respuesta
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60 dB
-
40 dB
-
40 phons
-
50 phons
Pregunta 30
Pregunta
During a standard audiogram procedure you hear sounds at intensity level of 0 dB. This is possible because:
Respuesta
-
Intensity of 10(-12) W/m2 is audible
-
Malfunction of the knob
-
Tympanic membrane can generate own sounds.
-
Your colleagues are too loud.
Pregunta 31
Pregunta
Percussion is a method for:
Respuesta
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Ultrasound Diagnostic
-
Ultrasound therapy
-
Diagnostic with sound, produced by the Doctor.
-
Ultrasound diagnostic, based on reflections from organs.
Pregunta 32
Pregunta
W?hat diagnostic method is described in the following text? : "There are four types of sounds; Resonant, Hyper-Resonant, Stony Dull or Dull. A Dull sound indicates the presence of a solid mass under the surface. A more resonant sound indicates hollow, air-containing structures".
Respuesta
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Auscultation
-
Percussion
-
Audiometry
-
Phonocardiography.
Pregunta 33
Pregunta
Simple (pure) tones with frequencies 0.125, 0.25, 0.5, 1, 2, 4 and 8 kHz, are used in:
Respuesta
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Auscultation
-
Percussion
-
Audiometry
-
Phonocardiography
Pregunta 34
Pregunta
Sphygmomanometer is used for:
Respuesta
-
Atmospheric pressure in the hospital
-
Arterial blood pressure
-
Lungs Air Pressure
Pregunta 35
Pregunta
Auscultation is:
Respuesta
-
Ultrasound Diagnostic;
-
Sound based Therapy
-
Sound based diagnostic
-
Infrasound Diagnostic
Pregunta 36
Pregunta
What diagnostic method use sub-audible sounds and murmurs (infrared range) produced from the heart?
Respuesta
-
Auscultation
-
Percussion
-
Audiometry
-
Phonocardiography
Pregunta 37
Pregunta
Hearing loss diagnostic based on variation of sound frequency:
Respuesta
-
Auscultation
-
Percussion
-
Audiometry
-
Phonocardiography
Pregunta 38
Pregunta
Mechanical waves used for breaking renal calculi (extra-corporeal lithotripsy) does not injure surrounding tissue because:
Respuesta
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Mechanical waves do not pass through the tissues
-
Acoustic pressure in tissues is several times lower than pressure in the calculi
-
Mechanical waves do not affect tissues
Pregunta 39
Pregunta
The main characteristic of noise is:
Respuesta
-
Minimum amplitude and frequency which do not alter with time
-
minimum frequency and amplitude which do not alter with time
-
frequency and amplitude which continuously altar with time
Pregunta 40
Pregunta
Consider the law of noise attenuation (figure). Which symbol refers to the type of material, noise-protection screens are made of?
Respuesta
-
k
-
d
-
e
Pregunta 41
Pregunta
How does intensity of noise vary with the distance from the source?
Respuesta
-
proportional to the distance r
-
proportional to the square distance r(2)
-
inversely proportional to the distance r
-
inversely proportional to the square of the distance r(2)
Pregunta 42
Pregunta
The frequency of echograph, marked on the ultrasound probe, relates mostly to:
Respuesta
-
Spatial resolution
-
Depth of penetration
-
Velocity of US propagation
Pregunta 43
Pregunta
Velocity of US in biological tissues depend on:
Respuesta
-
Frequency, marked on echograph's transducer
-
US Wavelength
-
Type of Examined tissues
Pregunta 44
Pregunta
Ultrasound can propagate in:
Respuesta
-
Vacuum
-
Material Substance
-
Any media through which electromagnetic waves (light) can propagate
Pregunta 45
Pregunta
Reflection coefficient a(2) of US at the boundary between two media with impedance Z1 and Z2 is determined by the expression:
Respuesta
Pregunta 46
Pregunta
The phenomenon, direct piezoelectric effect finds application in:
Respuesta
-
Generators of US
-
Detectors of US
-
Parametric transducers
Pregunta 47
Pregunta
The phenomenon reverse piezoelectric effect finds application in:
Respuesta
-
Generators of US
-
Detectors of US
-
Thermometers
Pregunta 48
Pregunta
The phenomena direct and reverse piezoelectric effect find application in:
Respuesta
-
Contact gel, used in US imaging
-
Transducers of echo-graphs
-
Generators of alternating electric current
Pregunta 49
Pregunta
Ultrasound propagates through body fluids as
Respuesta
-
Longitudinal Waves
-
Transverse Waves
-
Both Longitudinal and Transverse Waves
Pregunta 50
Pregunta
US propagates in the bones as
Respuesta
-
Longitudinal Waves
-
Transverse Waves
-
Longitudinal and Transverse waves
Pregunta 51
Pregunta
What frequency ultrasound is appropriate for deep tissue scanning?
Respuesta
-
8 MHz
-
3 kHz
-
3 MHz
-
20 MHz
Pregunta 52
Pregunta
Ultrasound propagates to a lesser depth in tissues compared to IS because:
Respuesta
-
Speed of propagation of US in tissues is slower
-
US is reflected off tissue structures with smaller cross-sectional dimensions
-
Acoustic impedance Za of tissues is lower for US
Pregunta 53
Pregunta
Diagnostic imaging method that uses the phenomenon of reflection:
Respuesta
-
Positron-emission tomography (PET)
-
Echography
-
Roentgen Diagnostics
Pregunta 54
Pregunta
What is the purpose of the contact gel used in echography:
Respuesta
-
To reflect US at the boundary of air and skin
-
To create an acoustically continuous medium for US propagation
-
To decrease harmful effects of US on the skin
Pregunta 55
Pregunta
In echography, tissues are examined with:
Respuesta
-
Permanent magnetic field
-
Ultrasound
-
Electric field
Pregunta 56
Pregunta
The contact gel must have:
Respuesta
-
Density p equal to the mean density of soft tissues
-
Chemical composition similar to that of soft tissues
-
Acoustic impedance Za equal to the average acoustic impedance of soft tissues
Pregunta 57
Pregunta
In A-mode ultrasound, the difference in acoustic impedance of tissues is depicted on the monitor as:
Respuesta
-
Spikes with different amplitudes
-
Dots with different brightness
-
Regions in different colours (the arteries in red; the veins in blue)
Pregunta 58
Pregunta
In B-mode ultrasound, the difference in acoustic impedance of tissue is depicted on the monitor as:
Respuesta
-
Spikes with different amplitudes
-
Dots with different brightness
-
Regions in different colours (the arteries in red; the veins in blue)
Pregunta 59
Pregunta
During echography, the contact gel is used for:
Respuesta
-
Near 100% reflection of ultrasound at the air-skin boundary
-
Near 100% absorption of ultrasound in patient's skin
-
Near 100% transmission of ultrasound through the skin
Pregunta 60
Pregunta
M-mode ultrasound is used for:
Respuesta
-
Immovable body structures
-
Movable body structures
-
Regions of the lung with pneumothorax.
Pregunta 61
Pregunta
The ultrasound technique called Colour Doppler is used to obtain information about:
Respuesta
-
Macro-circulation of blood:
-
Bone metastases
-
Glucose metabolism
Pregunta 62
Pregunta
Diagnostic imaging method based on Reflection:
Respuesta
-
Positron-emission tomography (PET)
-
Colour Doppler
-
Computed-tomography (CT)
-
Roentgenography
Pregunta 63
Pregunta
In a Doppler experiment, a probe frequency of 4 MHz corresponds to a frequency shift of 125 Hz. If probe frequency is now doubled to 8 MHz, what would be the expected frequency shift:
Respuesta
-
440 Hz
-
250 Hz
-
62.5 Hz
Pregunta 64
Pregunta
A diagnostic US imaging instrument uses a frequency of 6 MHz. What is the corresponding wavelength in soft tissues in the body:
Respuesta
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200 micrometre's
-
20 micrometre's
-
2 micrometre's
-
0.2 micrometre's
Pregunta 65
Pregunta
Speed of blood flow could be as fast as v=75 cm/s, what is the ratio (in %) of speed of blood to the speed of ultrasound in soft tissue:
Respuesta
-
5%
-
0.5%
-
0.05%
Pregunta 66
Pregunta
Sonophoresis is:
Respuesta
-
A drug sterilization method using ultrasound;
-
A therapeutic method using ultrasound
-
An ultrasound diagnostic
Pregunta 67
Pregunta
Pharmaceuticals applied with sonophoresis are:
Respuesta
-
Water-soluble only
-
Fat-soluble only
-
Either of them
Pregunta 68
Pregunta
Sonophoresis can transport
Respuesta
-
Ions only
-
Molecules
-
Either
Pregunta 69
Pregunta
High Intensity Focused Ultrasound (HIFU) procedure is:
Respuesta
-
Ultrasound surgery
-
Ultrasound diagnostic
-
Physical therapy with ultrasound
Pregunta 70
Pregunta
Ultrasound Diathermy is procedure for:
Respuesta
-
Ultrasound Surgery
-
Ultrasound Diagnostic
-
Therapy with Ultrasound
Pregunta 71
Pregunta
Ultrasound diathermy causes tissue:
Respuesta
-
Deep Heating
-
Coagulation
-
Necrosis
Pregunta 72
Pregunta
Sonophoresis and Ionophoresis are both methods for:
Respuesta
-
Electrostimulation
-
Surgical Procedures
-
Transcutaneous drug delivery
Pregunta 73
Pregunta
Infrasound (IR) of certain frequencies can cause:
Respuesta
-
Resonant vibration, and damage to internal organs
-
Deep penetration into tissues
-
Change in Propagation Velocity
-
Energy Deposition in Tissues
Pregunta 74
Pregunta
The speed of IS propagation, in certain medium, depends on:
Respuesta
-
The Frequency of IS
-
The Wavelength of IS
-
The Properties of the Medium
Pregunta 75
Pregunta
IS does not propagate in:
Respuesta
-
Vacuum
-
Soft Biological Tissues
-
Bones
Pregunta 76
Pregunta
Wavelengths of infrasound are shorter than:
Respuesta
-
Ultrasound
-
Audible sound
-
Sound with frequency of 3 kHz
-
None of the above
Pregunta 77
Pregunta
The resonant frequency of cardiac activity is in the:
Respuesta
-
Ultrasound Range
-
Infrasound Range
-
Frequency of about 10 MHz
Pregunta 78
Pregunta
The resonant frequency of vestibular apparatus is within:
Respuesta
-
Sound frequency of about 10 MHz
-
The Infrasound
-
The Ultrasound
Pregunta 79
Pregunta
The resonant frequency of Internal Organs is within:
Respuesta
-
Sound frequency of about 10 MHz
-
The Ultrasound
-
The Infrasound
Pregunta 80
Pregunta
The phenomenon of diffraction is more common for:
Respuesta
-
Infrasound
-
Ultrasound
-
Audible Sound
Pregunta 81
Pregunta
Which Science is related to IS:
Respuesta
-
Pediatrics
-
Seismology
-
Dentistry
-
Archeology
Pregunta 82
Pregunta
Which of the following is not true for earthquakes?
Respuesta
-
They are Longitudinal sound waves
-
They are transverse sound waves
-
Frequency is in the ultrasound range
Pregunta 83
Pregunta
What is the quantity transferred during diffusion:
Respuesta
-
Mass
-
Energy
-
Electric Charge
Pregunta 84
Pregunta
The quantity transferred during heat conduction is:
Respuesta
-
Impulse
-
Mass
-
Energy (Quantity of Heat)
Pregunta 85
Pregunta
Quantity transferred by internal friction:
Respuesta
-
Energy
-
Impulse
-
Electric Charge
Pregunta 86
Pregunta
A necessary condition for the process of diffusion is the availability of:
Respuesta
-
Semi-permeable membrane
-
Temperature Gradient
-
Concentration Gradient
Pregunta 87
Pregunta
A necessary condition for the process of internal friction is:
Respuesta
-
Concentration Gradient
-
Velocity gradient, in a direction perpendicular to the direction of fluid motion
-
Difference in the concentration of free electrons
Pregunta 88
Pregunta
A necessary condition for heat conduction is:
Respuesta
-
Temperature higher than the absolute zero
-
Difference in concentration (concentration gradient)
-
Temperature gradient
Pregunta 89
Pregunta
High heat conductivity of metals is explained by:
Respuesta
-
Higher Density
-
Free electrons in their crystals
-
Their smooth surface
Pregunta 90
Pregunta
Wet clothes make you feel cold because:
Respuesta
-
Thermal conductivity of water is higher than that of air:
-
It is only a subjective sensation
-
Wet clothes increase the total mass
Pregunta 91
Pregunta
Which organs and tissues of the human body have the least heat conductivity:
Respuesta
-
Muscles
-
The Brain
-
Skin and Fat Tissue
Pregunta 92
Pregunta
Which organs and tissues have the greatest heat conductivity
Respuesta
-
The Blood
-
The Brain
-
Skin and Fat Tissue
Pregunta 93
Pregunta
What is the physical meaning of cell membrane permeability, measured in m/s:
Respuesta
-
The cross section of ion-channels (ionic channels), in the cell membrane
-
The speed of ions passing across the cell membrane
-
The density of cell membrane
Pregunta 94
Pregunta
What is the different between osmosis and diffusion:
Respuesta
-
In osmosis, the solvent moves in order to equalize concentrations; in diffusion - the solute moves
-
Osmosis is a special case of diffusion
-
There is no difference
Pregunta 95
Pregunta
Which fluid phenomenon is used in hemodialysis:
Respuesta
-
Internal Friction
-
Diffusion
-
Osmosis
Pregunta 96
Pregunta
Consider Fick's Law (Figure) of diffusion, If contact surface is doubled and concentration gradient is reduced by a third, how can we adjust exposure time, to ensure the same total mass transfer:
Respuesta
-
2/3 t
-
4/3 t
-
3/2 t
-
1/2 t
Pregunta 97
Pregunta
The two properties of ideal fluids (liquid) are:
Respuesta
-
Incompressibility and absence of internal friction
-
Fluidity and low density
-
Molecular pressure and surface tension
Pregunta 98
Pregunta
Ideal Fluids are defined as:
Respuesta
-
p = const, n = const
-
p = const, n = 0
-
p = 0, n = const
-
p = 0, n = 0
Pregunta 99
Pregunta
Newtonian fluids (blood in large vessels) have density p and dynamic viscosity n as:
Respuesta
-
p = const, n = const
-
p = const, n = 0
-
p = 0, n = const
-
p = not const, n = not const
Pregunta 100
Pregunta
Non-newtonian fluids (blood in small vessels) are characterized by density - p, dynamic viscosity n; as follows
Respuesta
-
p = const, n = const
-
p = const, n = 0
-
p = 0, n = const
-
p = not const, n = not const
Pregunta 101
Pregunta
The role of surfactant in the alveoli of lungs is to reduce:
Respuesta
-
The surface tension coefficient
-
The molecular pressure
-
The dimensions of the alveoli
Pregunta 102
Pregunta
The additional (Laplace) pressure Change-P does not depend on:
Respuesta
-
The cross-sectional area - S, of blood vessel
-
The atmospheric pressure - b
-
The surface tension coefficient
Pregunta 103
Pregunta
The flow-ability (fluidity) of blood is determined by the value of:
Respuesta
-
Surface Tension Coefficient
-
Density - p
-
Dynamic Viscosity - n
Pregunta 104
Pregunta
Fluidity of which body liquid is much lower than the rest:
Respuesta
-
Blood
-
Synovial fluid
-
Urine
Pregunta 105
Pregunta
Let n be the dynamic viscosity of a liquid, and n-water = dynamic viscosity of water. The relative viscosity is given by:
Respuesta
-
The difference (n - nwater)
-
The sum (n + nwater)
-
The ratio (n/nwater)
-
The ration nwater/n
Pregunta 106
Pregunta
Relative viscosity is a dimensionless quantity, because it is:
Respuesta
-
Empirically determined
-
A ratio of two quantities
-
Equal to the dynamic viscosity which is a dimensionless quantity
Pregunta 107
Pregunta
Obstruction of blood vessels by gas bubbles (embolism) can be contributed to:
Respuesta
-
Reynolds number (Re)
-
Dynamic viscosity n of the blood
-
Additional (Laplace) pressure Change-p
Pregunta 108
Pregunta
Pulse wave velocity depends primarily on:
Respuesta
-
The Hematocrit (relative volume of erythrocytes in blood)
-
The elasticity of blood vessels
-
The cross section of blood vessels
Pregunta 109
Pregunta
Gas embolism is explained best with:
Respuesta
-
Sound impedance at the boundary of air and blood
-
The half-life of a radionuclide introduced in the blood
-
Change in additional (Laplace) pressure "change-p" of blood
Pregunta 110
Pregunta
What is a pulse wave?
Respuesta
-
Propagation of elastic deformation along the walls of arterial vessels
-
Periodic contractions of the cardiac muscle (myocard)
-
The cause for gas or fat embolism
Pregunta 111
Pregunta
Pulse wave velocity in people with atherosclerosis
Respuesta
-
Matches the speed of blood
-
Increases
-
Decreases
Pregunta 112
Pregunta
The most informative quantity about Vascularity of organ is:
Respuesta
-
Arterial blood pressure
-
Speed of the blood
-
Volume flow rate
Pregunta 113
Pregunta
Reynolds number Re for blood fluid describes:
Respuesta
-
Contractibility
-
Type of motion - Laminar or turbulent
-
Flowability (fluidity)
Pregunta 114
Pregunta
In a microgravity environment, such as the International Space Station, blood flow is not subjected to gravitational forces. This leads to reduction of the heart rate and the cardiac output. Upon return to earth cosmonauts often faint. This is due to:
Respuesta
-
Hypertension
-
Hypotension
-
Hypoxia
Pregunta 115
Pregunta
In the cardiovascular system, what physical quantity is preserved to assure a proper function:
Respuesta
-
Total pressure
-
Blood velocity
-
Volume Flow Rate
Pregunta 116
Pregunta
In auscultation blood pressure measurement, systolic pressure is indicated by:
Respuesta
-
The maximum loudness of sounds
-
The first detection of sounds
-
The disappearance of sounds
Pregunta 117
Pregunta
In auscultation blood pressure measurement, Diastolic pressure is indicated by:
Respuesta
-
The maximum loudness of sounds
-
The first detection of sounds
-
The disappearance of sounds
Pregunta 118
Pregunta
What causes the so called Korotkoff sounds
Respuesta
-
Laminar blood flow
-
Turbulent blood flow
-
Maximal blood flow
Pregunta 119
Pregunta
I would expect that, together with a sphygmomanometer, the finger pulse detector:
Respuesta
-
Could not be used to determine diastolic pressure
-
Could be used to determine diastolic pressure
-
Could not be used to determine systolic pressure
Pregunta 120
Pregunta
I would expect that the systolic blood pressure measured with the arm raised above the dead would be:
Respuesta
-
No different from that measured with the arm in its normal position.
-
Higher than that measured with the arm in its normal position.
-
Lower than that measured with the arm in its normal position.
Pregunta 121
Pregunta
The terms systole and diastole usaully refer to the ........... and ............. , respectively, of the ............. .
Respuesta
-
Relaxation, contraction, ventricles
-
Contraction, relaxation, ventricles
-
Relaxation, contraction, atria
-
Contraction, relaxation, aria
-
None of the above
Pregunta 122
Pregunta
The lower bound of blood pressure in "Arteria Brachialis", is determined (stethoscope) from what type of sounds:
Respuesta
-
Infrasounds
-
Ultrasounds
-
Noises caused by a turbulent motion
-
Disappearance of noises, after return to a laminar motion.
Pregunta 123
Pregunta
The optimal blood pressure is considered to be:
Respuesta
-
120/80 mm Hg
-
130/85 mm Hg
-
140/90 mm Hg
Pregunta 124
Pregunta
Normal blood pressure is considered to be:
Respuesta
-
120/80 mm Hg
-
130/85 mm Hg
-
140/90 mm Hg
Pregunta 125
Pregunta
Choose the correct match: Upper bound arterial blood pressure depends on the condition of ............. ; Lower bound of arterial blood pressure depends on the condition of ........... .
Respuesta
-
Blood Vessels, The Heart
-
The Heart, Blood Vessels
-
Pulse Wave, The Heart
-
None of the above.
Pregunta 126
Pregunta
Define the sub-pressure in the intrapleural space:
Respuesta
-
Pressure lower than the atmospheric pressure
-
Negative pressure, i.e pressure with negative sign
-
Pressure lower than the blood pressure.
Pregunta 127
Pregunta
Surfactant facilitates breathing through
Respuesta
-
Reduction of intrapressure
-
Increase of frequency of breathing
-
Reduction of Alveoli surface tension
Pregunta 128
Pregunta
The role of the surfactant in the lungs is to make changes in:
Respuesta
-
Alveolar Radius
-
Alveolar surface tension coefficient
-
molecular pressure p-coh
Pregunta 129
Pregunta
Inspiration is:
Respuesta
-
An active process with the participation of surfactant
-
A passive process
-
None of the Above
Pregunta 130
Pregunta
What is the approximate volume of air in one inspiration:
Respuesta
-
0.5 L
-
1.0 L
-
200 ml
Pregunta 131
Pregunta
The expiration is:
Respuesta
-
An active process with participation of a surfactant
-
A Passive process
-
An active process without participation of a surfactant
Pregunta 132
Pregunta
Difficult breathing in long-term smokers is due to:
Respuesta
-
Reduced secretion of surfactant in the alveoli
-
Weakening of breathing muscles
-
Pathological changes in the upper respiratory tracts
Pregunta 133
Pregunta
What physical phenomenon is associated with a physiological process involving a surfactant:
Respuesta
-
Internal friction and breathing
-
Surface tension and breathing
-
Harmonious vibration of the breathing and circulation of blood
Pregunta 134
Pregunta
During inhalation (breathing in) air moves into the lungs due to:
Respuesta
-
Diffusion
-
The force of gravity
-
Pressure difference.
Pregunta 135
Pregunta
During respiration Oxygen and CO2 are exchanges in the alveoli due to:
Respuesta
-
Diffusion
-
Pressure difference
-
Osmotic pressure
Pregunta 136
Pregunta
At higher elevations breathing frequency is increased to compensate for:
Respuesta
-
Lower Gravity
-
Higher Blood Pressure
-
Lower Atmospheric Pressure
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