Biophysics Sample test (1. LF UK)

Below you can try a sample credit test for biophysics:

{Blood pressure of 160 mmHg: - is referred to as mean pressure + is considered pathological - is the normal physiological value of systolic pressure - is the normal physiological value of diastolic pressure
 * type=""}

{The digital tonometer is based on: + oscillometric principle - on changes in the resistance of the strain gauge wire - on changes in the capacity of the strain gauge wire - none of the above options are correct
 * type=""}

{Where will the speed of sound be the highest? - in air at a temperature of 0°C - in water at a temperature of 0°C - in air at a temperature of 20°C + in steel
 * type=""}

{Sample activity - grows linearly with time + decreases exponentially with time - decreases linearly with time - grows exponentially with time
 * type=""}

{What are the units of absorbed dose? + Gy - Bq + J.kg-1 - this quantity is dimensionless
 * type="[]"}

{A laser device is a current of: + photons - electrons - positrons - helium nuclei
 * type=""}

{Reynolds number - gives the critical speed in [m.s-1] + is a quantity with the sign R + determines the limit value when turbulent flow turns into laminar flow - depends only on the viscosity and speed of the liquid and on the lumen of the vessel
 * type="[]"}

{Hypoxic tissue: - sensitivity to radiotherapy does not depend on oxygen content + is radioresistant - is radiosensitive - has a normal sensitivity to radiotherapy
 * type="[]"}

{Positive contrast agents: + absorb radiation more than the examined organ + on the X-ray image they cause a saturated shadow - cause clarification on the X-ray image - are substances with low absorption capacity
 * type="[]"}

{Betatron uses the acceleration principle - positrons and electrons - protons and neutrons + electrons - heavy charged particles
 * type=""}

{The rheobase is: - current frequency that is needed for irritation - current value at which tissue damage occurs - the highest current that can still be used safely + the smallest current that causes irritation
 * type=""}

{Bipolar limb lead II: - connects right leg and right hand - connects left arm and left leg - connects right leg and left hand + connects right arm and left leg
 * type=""}

{Applies to the audiogram: + is used to record audiometry results + has a curve for the right and left ear separately - the pain threshold is recorded in it + the curve that is marked in the audiogram is called an isophone
 * type="[]"}

{Where does periosteal pain occur? + at the interface of soft tissue and bone - at the interface of two soft tissues - at the interface of two tissues with similar bioimpedance to ultrasound - anywhere in the organism that is affected by ultrasound
 * type=""}

{Cannot be measured by spirometry - resting tidal volume - vital capacity + residual volume - inspiratory capacity
 * type=""}

{Effective half time + is always shorter than the biological half-life - is always longer than the biological half-life - is longer in real conditions than in physical conditions - does not match any of the above definitions
 * type=""}

{Quantum physics attributes to microworld objects: + particle and wave character - only wave character - only particle character - none of the listed options
 * type=""}

{What electrical properties does the cell membrane have if a high current passes through the tissues? frequencies? - the current flows only through the extracellular space + for electric current becomes through - represents an infinite resistance to electric current - bioimpedance is proportional to the weight of the extracellular fluid
 * type=""}

{Doppler effect in sonography enables: - distance measurement - measurement of acoustic resistance + detection of speed and direction of flow - measurement of tissue echogenicity
 * type=""}

{Applies to wavelength - λ = c.f + λ = c/f - λ = f/c - λ = 1/f
 * type=""}

{The cones are in different areas of the retina: - of the same shape - same shape but different core - of different shape and do not have a nucleus on the periphery of the retina + different shape
 * type=""}

{Astigmatism is corrected: - distractions + toric glasses - couplings - bifocal glasses
 * type=""}

{Low power laser can damage - internal organs - the skin - mucous membrane + sight
 * type=""}

{Close point + is the closest point that the eye can see sharply with maximum accommodation + moves away from the eye with increasing age - is the closest point that the eye can see clearly without accommodation - gets closer to the eye with increasing age
 * type="[]"}

{For X-ray imaging methods, we use: + of the current of electrons emitted from the cathode and accelerated by the high voltage between the cathode and the anode - fluorescence, which is caused by a stream of electrons after passing through the examined object - braking radiation caused by the impact of a current of positively charged electrons emitted from the anode and accelerated by the high voltage between the cathode and the anode - beta-radiation emitted by cobalt emitters
 * type=""}

{State quantities do not include: - pressure - internal energy + work - temperature
 * type=""}

{Indicate the correct unit of the Boltzmann constant - J + J.K-1 - J.K - J.K. kg
 * type=""}

{Brassoid X-rays: + has a continuous spectrum - can have a continuous or line spectrum - is created by the transition of electrons on the levels - no answer is correct
 * type=""}

{The Doppler effect does not occur - in a situation where the transmitter and receiver move at the same speed in different directions + in a situation where the transmitter and receiver are at rest + in a situation where the transmitter and receiver are moving at the same speed in the same directions - no answer is correct
 * type="[]"}