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PMU - Year 1 Physics - Part 1

Beschreibung

All Questions uploaded word for word from MCQ book. All Credit to Authors. Mistakes due in process may have been made, use and check your work at your own discretion. Only simple writing allowed, i.e Superscript and Subscript absent.
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Zusammenfassung der Ressource

Frage 1

Frage
Acoustic (sound) Impedance Za of a substance is equal to the product of:
Antworten
  • 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

Frage 2

Frage
The frequency of the sound is;
Antworten
  • Physical (objective) characteristic of the sound;
  • Psycho-physical (subjective) characteristic of the sound;
  • Common term for objective and subjective characteristic of the sound.

Frage 3

Frage
The velocity of the sound is:
Antworten
  • Physical (objective) characteristic of the sound
  • Psycho-physical (subjective) characteristic of the sound
  • Common term for objective and subjective characteristic of the sound

Frage 4

Frage
Main characteristic of the noise is:
Antworten
  • 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.

Frage 5

Frage
In which frequency range the human ear has maximum sensitivity:
Antworten
  • From 1000 to 3000 кНz;
  • From 1000 to 3000 МНz;
  • From 1000 to 3000 Нz.

Frage 6

Frage
The pitch of the sound is determined mainly by:
Antworten
  • Intensity of the sound;
  • Sound pressure;
  • Sound frequency.

Frage 7

Frage
The fundamental tone f0 in a complex sound has:
Antworten
  • Minimum amplitude and maximum frequency;
  • Minimum frequency and maximum amplitude;
  • Medium frequency and amplitude.

Frage 8

Frage
Sound can propagate in;
Antworten
  • Vacuum;
  • Any substance;
  • Any medium through which the electromagnetic waves also propagate.

Frage 9

Frage
Sound wavelength in the hearing band is longer than that of:
Antworten
  • Pulse Wave
  • Infrasound
  • Ultrasound

Frage 10

Frage
Reflection coefficient a2 (Alpha) of sound at the boundary between two media with sound impedance Z1 and Z2 is determined by the expression:
Antworten

Frage 11

Frage
Which condition is least significant for sound reflection:
Antworten
  • 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

Frage 12

Frage
When our heads are submerged in water we cannot hear people because;
Antworten
  • Sound is reflected almost completely at the water surface
  • Sound does not propagate through water
  • Our ear canals are filled with water

Frage 13

Frage
Sound wave travels across two materials with similar acoustic impedance. At the boundary surface, we expect:
Antworten
  • Similar amounts of transmission and reflection;
  • More transmission and less reflection;
  • less transmission and more reflection;

Frage 14

Frage
Sound timbre is;
Antworten
  • A physical (objective) feature of sound
  • Psycho-physical (subjective) feature of the sound
  • A common term objective and subjective characteristic of the sound

Frage 15

Frage
The psycho-physical law of Weber–Fehner on the sound perception is used to define the quantity:
Antworten
  • Sound (acoustic) pressure(p);
  • Sound pitch;
  • Intensity level(Е).

Frage 16

Frage
Human hearing has a maximum sensitivity at frequencies:
Antworten
  • from 1000 to 3000 kHz
  • from 1000 to 3000 MHz
  • from 1000 to 3000 Hz

Frage 17

Frage
The pitch of sound is determined mainly by:
Antworten
  • Sound Intensity
  • Sound Pressure
  • Sound Frequency

Frage 18

Frage
The operating frequency hearing range is:
Antworten
  • 10 MHz - 100 MHz
  • 10 kHz - 10 MHz
  • 10 Hz - 10,000 Hz

Frage 19

Frage
Human Frequency hearing range is:
Antworten
  • Below 20 Hz
  • From 20 to 20,000 MHz
  • Over 20,000 Hz

Frage 20

Frage
The subjective quantity "Intensity Level E" is defined at sound frequency:
Antworten
  • 16 Hz
  • 20 kHz
  • 1 kHz

Frage 21

Frage
At what frequency is "Loudness L" approximately the same as "Sound Intensity Level"?
Antworten
  • 1000 Hz
  • from 16 to 20,000 Hz
  • 1 MHz

Frage 22

Frage
Sound Intensity Level E is measured in units of:
Antworten
  • Watt, W
  • Decibel, dB
  • Hertz, Hz

Frage 23

Frage
Sound Intensity Level "E" is equal to zero if:
Antworten
  • I = Io
  • I > Io
  • I < Io
  • SIL is never 0

Frage 24

Frage
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?:
Antworten
  • Will increase by a factor of 10 (times 10)
  • Will double (times 2)
  • Will increase with 20 dB (plus 20dB)

Frage 25

Frage
The timbre (quality) of a tone:
Antworten
  • Decreases with loudness
  • Is proportional to the frequency
  • Is inversely proportional to the frequency
  • depends upon the overtones that are present

Frage 26

Frage
Is it possible for Humans to detect ultrasound?:
Antworten
  • Not possible
  • Yes, the blue shift is visible
  • Yes, some frequencies cause a heating sensation.

Frage 27

Frage
Is it possible for humans to detect Infrasound:
Antworten
  • Not possible
  • Yes, the red shift is visible
  • The body can sense certain vibrations

Frage 28

Frage
Timbre is related to:
Antworten
  • Harmonic Overtones
  • Sound from a tuning fork
  • Noise from a medical apparatus

Frage 29

Frage
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
Image:
a62d4fa5-86b9-44d6-bd9d-c9a5f479e898 (image/jpg)
Antworten
  • 60 dB
  • 40 dB
  • 40 phons
  • 50 phons

Frage 30

Frage
During a standard audiogram procedure you hear sounds at intensity level of 0 dB. This is possible because:
Antworten
  • Intensity of 10(-12) W/m2 is audible
  • Malfunction of the knob
  • Tympanic membrane can generate own sounds.
  • Your colleagues are too loud.

Frage 31

Frage
Percussion is a method for:
Antworten
  • Ultrasound Diagnostic
  • Ultrasound therapy
  • Diagnostic with sound, produced by the Doctor.
  • Ultrasound diagnostic, based on reflections from organs.

Frage 32

Frage
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".
Antworten
  • Auscultation
  • Percussion
  • Audiometry
  • Phonocardiography.

Frage 33

Frage
Simple (pure) tones with frequencies 0.125, 0.25, 0.5, 1, 2, 4 and 8 kHz, are used in:
Antworten
  • Auscultation
  • Percussion
  • Audiometry
  • Phonocardiography

Frage 34

Frage
Sphygmomanometer is used for:
Antworten
  • Atmospheric pressure in the hospital
  • Arterial blood pressure
  • Lungs Air Pressure

Frage 35

Frage
Auscultation is:
Antworten
  • Ultrasound Diagnostic;
  • Sound based Therapy
  • Sound based diagnostic
  • Infrasound Diagnostic

Frage 36

Frage
What diagnostic method use sub-audible sounds and murmurs (infrared range) produced from the heart?
Antworten
  • Auscultation
  • Percussion
  • Audiometry
  • Phonocardiography

Frage 37

Frage
Hearing loss diagnostic based on variation of sound frequency:
Antworten
  • Auscultation
  • Percussion
  • Audiometry
  • Phonocardiography

Frage 38

Frage
Mechanical waves used for breaking renal calculi (extra-corporeal lithotripsy) does not injure surrounding tissue because:
Antworten
  • 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

Frage 39

Frage
The main characteristic of noise is:
Antworten
  • 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

Frage 40

Frage
Consider the law of noise attenuation (figure). Which symbol refers to the type of material, noise-protection screens are made of?
Image:
0551f5e8-9f12-400d-bcdf-18d5a3c074d7 (image/png)
Antworten
  • k
  • d
  • e

Frage 41

Frage
How does intensity of noise vary with the distance from the source?
Antworten
  • 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)

Frage 42

Frage
The frequency of echograph, marked on the ultrasound probe, relates mostly to:
Antworten
  • Spatial resolution
  • Depth of penetration
  • Velocity of US propagation

Frage 43

Frage
Velocity of US in biological tissues depend on:
Antworten
  • Frequency, marked on echograph's transducer
  • US Wavelength
  • Type of Examined tissues

Frage 44

Frage
Ultrasound can propagate in:
Antworten
  • Vacuum
  • Material Substance
  • Any media through which electromagnetic waves (light) can propagate

Frage 45

Frage
Reflection coefficient a(2) of US at the boundary between two media with impedance Z1 and Z2 is determined by the expression:
Antworten

Frage 46

Frage
The phenomenon, direct piezoelectric effect finds application in:
Antworten
  • Generators of US
  • Detectors of US
  • Parametric transducers

Frage 47

Frage
The phenomenon reverse piezoelectric effect finds application in:
Antworten
  • Generators of US
  • Detectors of US
  • Thermometers

Frage 48

Frage
The phenomena direct and reverse piezoelectric effect find application in:
Antworten
  • Contact gel, used in US imaging
  • Transducers of echo-graphs
  • Generators of alternating electric current

Frage 49

Frage
Ultrasound propagates through body fluids as
Antworten
  • Longitudinal Waves
  • Transverse Waves
  • Both Longitudinal and Transverse Waves

Frage 50

Frage
US propagates in the bones as
Antworten
  • Longitudinal Waves
  • Transverse Waves
  • Longitudinal and Transverse waves

Frage 51

Frage
What frequency ultrasound is appropriate for deep tissue scanning?
Antworten
  • 8 MHz
  • 3 kHz
  • 3 MHz
  • 20 MHz

Frage 52

Frage
Ultrasound propagates to a lesser depth in tissues compared to IS because:
Antworten
  • 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

Frage 53

Frage
Diagnostic imaging method that uses the phenomenon of reflection:
Antworten
  • Positron-emission tomography (PET)
  • Echography
  • Roentgen Diagnostics

Frage 54

Frage
What is the purpose of the contact gel used in echography:
Antworten
  • 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

Frage 55

Frage
In echography, tissues are examined with:
Antworten
  • Permanent magnetic field
  • Ultrasound
  • Electric field

Frage 56

Frage
The contact gel must have:
Antworten
  • 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

Frage 57

Frage
In A-mode ultrasound, the difference in acoustic impedance of tissues is depicted on the monitor as:
Antworten
  • Spikes with different amplitudes
  • Dots with different brightness
  • Regions in different colours (the arteries in red; the veins in blue)

Frage 58

Frage
In B-mode ultrasound, the difference in acoustic impedance of tissue is depicted on the monitor as:
Antworten
  • Spikes with different amplitudes
  • Dots with different brightness
  • Regions in different colours (the arteries in red; the veins in blue)

Frage 59

Frage
During echography, the contact gel is used for:
Antworten
  • 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

Frage 60

Frage
M-mode ultrasound is used for:
Antworten
  • Immovable body structures
  • Movable body structures
  • Regions of the lung with pneumothorax.

Frage 61

Frage
The ultrasound technique called Colour Doppler is used to obtain information about:
Antworten
  • Macro-circulation of blood:
  • Bone metastases
  • Glucose metabolism

Frage 62

Frage
Diagnostic imaging method based on Reflection:
Antworten
  • Positron-emission tomography (PET)
  • Colour Doppler
  • Computed-tomography (CT)
  • Roentgenography

Frage 63

Frage
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:
Antworten
  • 440 Hz
  • 250 Hz
  • 62.5 Hz

Frage 64

Frage
A diagnostic US imaging instrument uses a frequency of 6 MHz. What is the corresponding wavelength in soft tissues in the body:
Antworten
  • 200 micrometre's
  • 20 micrometre's
  • 2 micrometre's
  • 0.2 micrometre's

Frage 65

Frage
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:
Antworten
  • 5%
  • 0.5%
  • 0.05%

Frage 66

Frage
Sonophoresis is:
Antworten
  • A drug sterilization method using ultrasound;
  • A therapeutic method using ultrasound
  • An ultrasound diagnostic

Frage 67

Frage
Pharmaceuticals applied with sonophoresis are:
Antworten
  • Water-soluble only
  • Fat-soluble only
  • Either of them

Frage 68

Frage
Sonophoresis can transport
Antworten
  • Ions only
  • Molecules
  • Either

Frage 69

Frage
High Intensity Focused Ultrasound (HIFU) procedure is:
Antworten
  • Ultrasound surgery
  • Ultrasound diagnostic
  • Physical therapy with ultrasound

Frage 70

Frage
Ultrasound Diathermy is procedure for:
Antworten
  • Ultrasound Surgery
  • Ultrasound Diagnostic
  • Therapy with Ultrasound

Frage 71

Frage
Ultrasound diathermy causes tissue:
Antworten
  • Deep Heating
  • Coagulation
  • Necrosis

Frage 72

Frage
Sonophoresis and Ionophoresis are both methods for:
Antworten
  • Electrostimulation
  • Surgical Procedures
  • Transcutaneous drug delivery

Frage 73

Frage
Infrasound (IR) of certain frequencies can cause:
Antworten
  • Resonant vibration, and damage to internal organs
  • Deep penetration into tissues
  • Change in Propagation Velocity
  • Energy Deposition in Tissues

Frage 74

Frage
The speed of IS propagation, in certain medium, depends on:
Antworten
  • The Frequency of IS
  • The Wavelength of IS
  • The Properties of the Medium

Frage 75

Frage
IS does not propagate in:
Antworten
  • Vacuum
  • Soft Biological Tissues
  • Bones

Frage 76

Frage
Wavelengths of infrasound are shorter than:
Antworten
  • Ultrasound
  • Audible sound
  • Sound with frequency of 3 kHz
  • None of the above

Frage 77

Frage
The resonant frequency of cardiac activity is in the:
Antworten
  • Ultrasound Range
  • Infrasound Range
  • Frequency of about 10 MHz

Frage 78

Frage
The resonant frequency of vestibular apparatus is within:
Antworten
  • Sound frequency of about 10 MHz
  • The Infrasound
  • The Ultrasound

Frage 79

Frage
The resonant frequency of Internal Organs is within:
Antworten
  • Sound frequency of about 10 MHz
  • The Ultrasound
  • The Infrasound

Frage 80

Frage
The phenomenon of diffraction is more common for:
Antworten
  • Infrasound
  • Ultrasound
  • Audible Sound

Frage 81

Frage
Which Science is related to IS:
Antworten
  • Pediatrics
  • Seismology
  • Dentistry
  • Archeology

Frage 82

Frage
Which of the following is not true for earthquakes?
Antworten
  • They are Longitudinal sound waves
  • They are transverse sound waves
  • Frequency is in the ultrasound range

Frage 83

Frage
What is the quantity transferred during diffusion:
Antworten
  • Mass
  • Energy
  • Electric Charge

Frage 84

Frage
The quantity transferred during heat conduction is:
Antworten
  • Impulse
  • Mass
  • Energy (Quantity of Heat)

Frage 85

Frage
Quantity transferred by internal friction:
Antworten
  • Energy
  • Impulse
  • Electric Charge

Frage 86

Frage
A necessary condition for the process of diffusion is the availability of:
Antworten
  • Semi-permeable membrane
  • Temperature Gradient
  • Concentration Gradient

Frage 87

Frage
A necessary condition for the process of internal friction is:
Antworten
  • Concentration Gradient
  • Velocity gradient, in a direction perpendicular to the direction of fluid motion
  • Difference in the concentration of free electrons

Frage 88

Frage
A necessary condition for heat conduction is:
Antworten
  • Temperature higher than the absolute zero
  • Difference in concentration (concentration gradient)
  • Temperature gradient

Frage 89

Frage
High heat conductivity of metals is explained by:
Antworten
  • Higher Density
  • Free electrons in their crystals
  • Their smooth surface

Frage 90

Frage
Wet clothes make you feel cold because:
Antworten
  • Thermal conductivity of water is higher than that of air:
  • It is only a subjective sensation
  • Wet clothes increase the total mass

Frage 91

Frage
Which organs and tissues of the human body have the least heat conductivity:
Antworten
  • Muscles
  • The Brain
  • Skin and Fat Tissue

Frage 92

Frage
Which organs and tissues have the greatest heat conductivity
Antworten
  • The Blood
  • The Brain
  • Skin and Fat Tissue

Frage 93

Frage
What is the physical meaning of cell membrane permeability, measured in m/s:
Antworten
  • 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

Frage 94

Frage
What is the different between osmosis and diffusion:
Antworten
  • 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

Frage 95

Frage
Which fluid phenomenon is used in hemodialysis:
Antworten
  • Internal Friction
  • Diffusion
  • Osmosis

Frage 96

Frage
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:
Image:
7215bef8-355f-469a-9957-da2ccd2c5bdb (image/png)
Antworten
  • 2/3 t
  • 4/3 t
  • 3/2 t
  • 1/2 t

Frage 97

Frage
The two properties of ideal fluids (liquid) are:
Antworten
  • Incompressibility and absence of internal friction
  • Fluidity and low density
  • Molecular pressure and surface tension

Frage 98

Frage
Ideal Fluids are defined as:
Antworten
  • p = const, n = const
  • p = const, n = 0
  • p = 0, n = const
  • p = 0, n = 0

Frage 99

Frage
Newtonian fluids (blood in large vessels) have density p and dynamic viscosity n as:
Antworten
  • p = const, n = const
  • p = const, n = 0
  • p = 0, n = const
  • p = not const, n = not const

Frage 100

Frage
Non-newtonian fluids (blood in small vessels) are characterized by density - p, dynamic viscosity n; as follows
Antworten
  • p = const, n = const
  • p = const, n = 0
  • p = 0, n = const
  • p = not const, n = not const

Frage 101

Frage
The role of surfactant in the alveoli of lungs is to reduce:
Antworten
  • The surface tension coefficient
  • The molecular pressure
  • The dimensions of the alveoli

Frage 102

Frage
The additional (Laplace) pressure Change-P does not depend on:
Antworten
  • The cross-sectional area - S, of blood vessel
  • The atmospheric pressure - b
  • The surface tension coefficient

Frage 103

Frage
The flow-ability (fluidity) of blood is determined by the value of:
Antworten
  • Surface Tension Coefficient
  • Density - p
  • Dynamic Viscosity - n

Frage 104

Frage
Fluidity of which body liquid is much lower than the rest:
Antworten
  • Blood
  • Synovial fluid
  • Urine

Frage 105

Frage
Let n be the dynamic viscosity of a liquid, and n-water = dynamic viscosity of water. The relative viscosity is given by:
Antworten
  • The difference (n - nwater)
  • The sum (n + nwater)
  • The ratio (n/nwater)
  • The ration nwater/n

Frage 106

Frage
Relative viscosity is a dimensionless quantity, because it is:
Antworten
  • Empirically determined
  • A ratio of two quantities
  • Equal to the dynamic viscosity which is a dimensionless quantity

Frage 107

Frage
Obstruction of blood vessels by gas bubbles (embolism) can be contributed to:
Antworten
  • Reynolds number (Re)
  • Dynamic viscosity n of the blood
  • Additional (Laplace) pressure Change-p

Frage 108

Frage
Pulse wave velocity depends primarily on:
Antworten
  • The Hematocrit (relative volume of erythrocytes in blood)
  • The elasticity of blood vessels
  • The cross section of blood vessels

Frage 109

Frage
Gas embolism is explained best with:
Antworten
  • 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

Frage 110

Frage
What is a pulse wave?
Antworten
  • Propagation of elastic deformation along the walls of arterial vessels
  • Periodic contractions of the cardiac muscle (myocard)
  • The cause for gas or fat embolism

Frage 111

Frage
Pulse wave velocity in people with atherosclerosis
Antworten
  • Matches the speed of blood
  • Increases
  • Decreases

Frage 112

Frage
The most informative quantity about Vascularity of organ is:
Antworten
  • Arterial blood pressure
  • Speed of the blood
  • Volume flow rate

Frage 113

Frage
Reynolds number Re for blood fluid describes:
Antworten
  • Contractibility
  • Type of motion - Laminar or turbulent
  • Flowability (fluidity)

Frage 114

Frage
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:
Antworten
  • Hypertension
  • Hypotension
  • Hypoxia

Frage 115

Frage
In the cardiovascular system, what physical quantity is preserved to assure a proper function:
Antworten
  • Total pressure
  • Blood velocity
  • Volume Flow Rate

Frage 116

Frage
In auscultation blood pressure measurement, systolic pressure is indicated by:
Antworten
  • The maximum loudness of sounds
  • The first detection of sounds
  • The disappearance of sounds

Frage 117

Frage
In auscultation blood pressure measurement, Diastolic pressure is indicated by:
Antworten
  • The maximum loudness of sounds
  • The first detection of sounds
  • The disappearance of sounds

Frage 118

Frage
What causes the so called Korotkoff sounds
Antworten
  • Laminar blood flow
  • Turbulent blood flow
  • Maximal blood flow

Frage 119

Frage
I would expect that, together with a sphygmomanometer, the finger pulse detector:
Antworten
  • Could not be used to determine diastolic pressure
  • Could be used to determine diastolic pressure
  • Could not be used to determine systolic pressure

Frage 120

Frage
I would expect that the systolic blood pressure measured with the arm raised above the dead would be:
Antworten
  • 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.

Frage 121

Frage
The terms systole and diastole usaully refer to the ........... and ............. , respectively, of the ............. .
Antworten
  • Relaxation, contraction, ventricles
  • Contraction, relaxation, ventricles
  • Relaxation, contraction, atria
  • Contraction, relaxation, aria
  • None of the above

Frage 122

Frage
The lower bound of blood pressure in "Arteria Brachialis", is determined (stethoscope) from what type of sounds:
Antworten
  • Infrasounds
  • Ultrasounds
  • Noises caused by a turbulent motion
  • Disappearance of noises, after return to a laminar motion.

Frage 123

Frage
The optimal blood pressure is considered to be:
Antworten
  • 120/80 mm Hg
  • 130/85 mm Hg
  • 140/90 mm Hg

Frage 124

Frage
Normal blood pressure is considered to be:
Antworten
  • 120/80 mm Hg
  • 130/85 mm Hg
  • 140/90 mm Hg

Frage 125

Frage
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 ........... .
Antworten
  • Blood Vessels, The Heart
  • The Heart, Blood Vessels
  • Pulse Wave, The Heart
  • None of the above.

Frage 126

Frage
Define the sub-pressure in the intrapleural space:
Antworten
  • Pressure lower than the atmospheric pressure
  • Negative pressure, i.e pressure with negative sign
  • Pressure lower than the blood pressure.

Frage 127

Frage
Surfactant facilitates breathing through
Antworten
  • Reduction of intrapressure
  • Increase of frequency of breathing
  • Reduction of Alveoli surface tension

Frage 128

Frage
The role of the surfactant in the lungs is to make changes in:
Antworten
  • Alveolar Radius
  • Alveolar surface tension coefficient
  • molecular pressure p-coh

Frage 129

Frage
Inspiration is:
Antworten
  • An active process with the participation of surfactant
  • A passive process
  • None of the Above

Frage 130

Frage
What is the approximate volume of air in one inspiration:
Antworten
  • 0.5 L
  • 1.0 L
  • 200 ml

Frage 131

Frage
The expiration is:
Antworten
  • An active process with participation of a surfactant
  • A Passive process
  • An active process without participation of a surfactant

Frage 132

Frage
Difficult breathing in long-term smokers is due to:
Antworten
  • Reduced secretion of surfactant in the alveoli
  • Weakening of breathing muscles
  • Pathological changes in the upper respiratory tracts

Frage 133

Frage
What physical phenomenon is associated with a physiological process involving a surfactant:
Antworten
  • Internal friction and breathing
  • Surface tension and breathing
  • Harmonious vibration of the breathing and circulation of blood

Frage 134

Frage
During inhalation (breathing in) air moves into the lungs due to:
Antworten
  • Diffusion
  • The force of gravity
  • Pressure difference.

Frage 135

Frage
During respiration Oxygen and CO2 are exchanges in the alveoli due to:
Antworten
  • Diffusion
  • Pressure difference
  • Osmotic pressure

Frage 136

Frage
At higher elevations breathing frequency is increased to compensate for:
Antworten
  • Lower Gravity
  • Higher Blood Pressure
  • Lower Atmospheric Pressure
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