Biophysics

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How does the flow rate of viscous liquid depend on its viscosity?

It is inversely proportional to the viscosity (correct)

It increases proportionally to the fourth power of the viscosity

It does not depend on the viscosity

It is directly proportional to the viscosity

The diffusion constant depends on…

The density of the medium

The shape of the diffusing particle

The temperature (correct)

The viscosity of the medium (correct)

What is the Na concentration in isotonic NaCl saline?

0.09% (correct)

0.18%

0.1%

0.03%

The unit of effective does is…

J/Kg Signup and view all the answers

Which of the following statements are true? The alpha particles are…

Doubly ionised He atoms Signup and view all the answers

Which of the following statements are true?

The penetration of higher frequency sound is less than that of lower frequency sounds Signup and view all the answers

Which infusion solution causes hemolysis?

Hypotonic solution Signup and view all the answers

The activity of a radioactive source means…

the number of radioactive decays per seconds Signup and view all the answers

The height of the QRS complex peak in Lead II ECG signal is…

1-2mV Signup and view all the answers

Lambert’s law gives…

the attenuation of the intensity of light passing through a material as a function of the thickness of the material Signup and view all the answers

Which method does NOT use electromagnetic radiation to make the image?

Echoencephalography Signup and view all the answers

Which quantity has the SI unit of kg/ms?

The viscosity Signup and view all the answers

What does the degree of light refraction at the boundary of two media depend on?

the speed of light in the two media Signup and view all the answers

Which statement is false?

the transformation of the eyes from light-adapted state to dark-adapted one takes over about five minutes Signup and view all the answers

What happens when two light waves meet?

their amplitudes are added together Signup and view all the answers

The patch-clamp technique…

measures the difference between intracellular and extracellular Na ion concentrations Signup and view all the answers

The frequency used in capacitance type diathermy is…

0.03 Gh Signup and view all the answers

If a real object is within the focal length of the converging lens, the image is…

Virtual and erect Signup and view all the answers

Which statement about Bremsstrahlung is true?

its power depends on the acceleration voltage Signup and view all the answers

After one hour, what percentage of the inhaled 11C isotope with a half-life of 20 minutes has not yet decayed?

12.5% Signup and view all the answers

Which EEG wave frequency falls in the frequency range of 4 Hz to 7 Hz?

Theta Signup and view all the answers

The power of two thin lenses in contact is equal to…

the sum of the powers of the two lenses Signup and view all the answers

Which answer is true? The diffusion coefficient depends on…

Viscosity of the medium Signup and view all the answers

Which one is true?

incoming intensity is equiled absorb intensity plus reflected intensity plus transmitted intensity Signup and view all the answers

Greek letters: lambda, delta, pi

λ Signup and view all the answers

The dimension of impulse is…

kg x m / s Signup and view all the answers

The dimension of energy does is…

J/kg Signup and view all the answers

The light atomic nucleus is about…

10-15 meters big Signup and view all the answers

How is the performance defined?

energy/time Signup and view all the answers

A half radian is…

approximately 28.672° Signup and view all the answers

Beta radiation…

has a continuous spectrum with maximum energy Signup and view all the answers

Properties of the mesophases…

Anisotropy Signup and view all the answers

Applies to the sine function…

sin(t) is the same sin(t+2*pi) Signup and view all the answers

Remain after three times the half-life…

12.5% the kernels Signup and view all the answers

Lambert-Bert’s law applies to…

light reflection for thin solutions Signup and view all the answers

One type of torque is…

Bending Signup and view all the answers

A thermodynamically isolated system is…

a system with an exchange of energy and matter Signup and view all the answers

What is correct? (multiple answers)

1000 micrometer is 1 millimeter Signup and view all the answers

In mechanical equilibrium what adds up?

All the forces Signup and view all the answers

Isotherm thermodynamics is when…

the temperature is constant Signup and view all the answers

Onsager equation shows the dependence of the electrical conductivity of an electrolyte on its concentration (multiple answers)

Ideal fluids Signup and view all the answers

sin(π/2) + sin(π/4) (multiple answers)

Etwa 0.85 Signup and view all the answers

Ionization is when electrons are…

freely dispersed Signup and view all the answers

A bird is 1 kg and flies with 36 km per hour. What is the kinetic energy?

50 j Signup and view all the answers

Which dimension corresponds to sound?

Ground frequency Signup and view all the answers

Elementary process of attenuation of x-rays (multiple answers)

Photoeffect Signup and view all the answers

Abbe theory is valid for…

light refraction Signup and view all the answers

Extensive dimensions are…

additive Signup and view all the answers

Ionized radiations are… (multiple answers)

Beta radiation Signup and view all the answers

Lens error are… (multiple answers)

chromatic aberration Signup and view all the answers

Range of beta radiation (multiple answers)

in the air 10 cm ~ a few meters Signup and view all the answers

Boltzmann distribution does NOT describe (multiple answers)

effective half time Signup and view all the answers

Transport of heat processes are… (multiple answers)

Conduction Signup and view all the answers

A kitten of 2 kg mass sits on a 1 m high wall and then runs on the ground at the speed of 4m/s. When is the kitten’s mechanical energy bigger? (g=10m/s)

when it sits on the wall Signup and view all the answers

Where is the highest blood pressure of a standing person?

In the foot Signup and view all the answers

Which imaging equipment can most accurately delineate cancerous tumors?

MRI Signup and view all the answers

Which quantity decreases with increasing number of measurements?

the average (mean) Signup and view all the answers

Which quantity decreases as the number of measurements increases?

The error of the mean Signup and view all the answers

Which device does not have an electron gun?

The X-ray tube Signup and view all the answers

Which of the following statements are FALSE?

During faciliated diffusion, the particles move from the area of lower concentration to the area of higher concentration through the cell membrane Signup and view all the answers

Which formulas are related to light diffraction?

asinθ =mλ Signup and view all the answers

Which statement concerning the dark-adapted state of the eye is FALSE?

The dark-adapted state develops within minutes moving from the light to the dark room Signup and view all the answers

Which EEG wave frequency falls in the frequency range between 8 Hz and 13 Hz?

The alpha wave Signup and view all the answers

How does the pressure of an ideal fluid flowing in a tube change if the diameter of the tube decreases?

It decreases Signup and view all the answers

How does the pressure of an ideal fluid flowing in a tube change if the diameter of the tube increases?

It increases Signup and view all the answers

After forty minutes, what percentage of the inhaled 13N isotope with a half-life of 10 minutes has already decayed?

93,75% Signup and view all the answers