Biophysics
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
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
Working with laser, remember to use
Safety glasses
Thyroid shield
Creams with UV filters
Protective lead screen
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
All listed types of radiation are of the same nature except
X ray
Gamma radiation
Alpha radiation
Cosmic radiation
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
CT
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
A contraindication for the X-ray test is
Pregnancy
Pacemaker
Hypertension
None of the 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
15
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
In what wavelength range do NMR devices work?
Microwaves (radars)
Radio waves
Ultraviolet
Infrared waves
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
80
48
75
Effects of interaction of radiation with organisms are
Only stochastic
Only deterministic
Stochastic and deterministic
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