Biophysics

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Biophysics Exploration Quiz

Test your knowledge in the fascinating field of biophysics with our comprehensive quiz! This engaging quiz consists of 41 questions covering various topics related to biophysics, from electromagnetic waves to human physiology.

Join us to challenge yourself and discover:

Key concepts in biophysics
Applications of physics in biological systems
The interplay between biology and various physical phenomena

41 Questions10 MinutesCreated by AnalyzingWave341

Physical phenomen/phenomena used in Magnetic resonance (MRI) is/are

Nuclear Magnetic Resonance (NMR) and Electron spin resonance (ESR)

Nuclear Magnetic Resonance (NMR)

Nuclear magnetic resonance (NMR) and electron paramagnetic resonance (EPR)

Radioactive decay

Circulatory system consists of

Pulmonary circulation

Systemic circulation

Blood, hear, vessels

All answers are correct

In the computed tomography (CT) scanners:

X rays are attenuated in Tissues, depending on the tissue density

X rays are attenuated in tissues, depending on elastic properties of the tissue

X rays echo (result of EM) waves reflection from tissues) is detected by RF coils

Gamma rays are attenuated in tissues, depending on the tissue density

What information from absorption spectrum is needed to find the composition of the sample?

Height of maximum absorbance

Wavelength which corresponds with maximum of absorbance

Width of maximum absorbance

Wavelength which correspond with constant value of absorbance

Necessary to leaser action is

Population inversion

Metastable state of energy

Metastable stateof energy and population inversion

Metastable state of energy and equal population on all levels of energy

During normal breathing the pressure in the alveoli is

Always negative (below atmospheric pressure)

Always positive (more than -//-)

Negative during inspiration and positive during expiration

Positive during inspiration and negative during expiration

For the electromagnetic wave we can observe:

Compton effect

Photoelectric effect

Interference and diffraction

All answers are correct

Residual volume is about 1 liter, with the strong effort of expiration one can dimnish residual volume by

0 ml

100 ml

200 ml

500 ml

The phenomenon of total internal reflection of light is used in the

Brain ultrasound

Lungs ultrasound

Endoscopy

Eardrum

Energy of electromagnetic wave is

Proportional to wavelength

Proportional to frequency

Inversely proportional to frequency

Inversely proportional to frequency and wavelength

The image formed on the retina of the eye is an image of

Apparent simple

Apparent inverted

Real reverse

Real straight

The patient will reveive the highest dose of ionizing radiation as a result of _______ scan/imaging

MRI

PET

Conventional RTG

Density of liquid is equal to 1g/cm3; choose correst values in other units.

0,1 kg/dm3, and 1000kg/m3

1kg/dm3 and 1000 kg/m3

1kg/dm3, and 10 000 kg/m3

10 kg/dm3, and 106 kg/m3

To describe vector quantities it is necessary to know

Numerical value and initial point

Numerical vale and direction

Only the numerical value

Numerical value and initial point

If you know Z (atomic number) then you can know:

The name of the element, the numver of the nucleons in the nucleus and the place of the element in periodic table

The name of the element, the number of neutrons in the nucleus and the place of the elemnt in the periodic tale

The name of the element, the numver of protons in the nucelus and the place of the element in the periodic table

None of the above answers is correct

Absorption spectrum describes

Relation between transmittance and wavelength

Relation between reflected radiation and wavelength

Relation between absorbed radiation and wavelength

Relation between aborbance and transmittance

Medical ultrasound uses frequencies on the order of 2 MHz. If the speed of sound in tisse is 1500 m/s. If the penetration distance is approximately 200 wavelengths, how deep can this instrument penetrate.

15 cm

1,5 cm

3 cm

3 mm

Surgical lasers in comparison with traditional surgical tools are

Equally presice, reduce bleeding

Less preciste but reduce bleeding

More precise, reduce bleeding

More presice, do not reduce bleeding

Magnetic resonance tomography may be__________ examination

An anatomical

A functional

A spectroscopic

All of the above

Magnification of microscope is 150; magnifaction of microscope eyepieces is 10, what is the magnification of objective

1200

130

110

In the x ray tube

Electrons move towards the cathode and are accelreated due the potential difference

Electrons move towards the anode and are accelareted due the potential difference

Electrons move towards the cathode and are decelareted due to the potential difference

Electrons move towards the anode and are decelerated due to the potential difference

The activity of the sample used in radioactive nuclear medicine 60Co after heating it to the temperature of 100oC will be:

Greater than before heating

Smaller than before heating

The same as before heating

It will cease to be radioactive

The recording speed of ECG is 250 mm/sec. There are regular heartbeats (HB). The distance between nearest two QRS waves (between two HB) is 20 mm. Calculate the heartbeats rate (HB/min), please

125

Effects of interaction of radiation with organisms are

Only stochastic

Only deterministic

Stochastic and deterministic

Which elements of the eye take a direct (main) part in "dirrecting" the course of light rays:

Cornea - lens

Cornea - iris

C. lens

D. pupil - lens

In the room air partial pressure of water vapor is 2kPa. What is the pecentage of water vapor in the room of air atmospheric pressusre is about 100 kPa:

0.2%

20%

Water vapor is not a gas

Biophysics

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