Biophysics 2
104-155
104-155
Set of flashcards Details
| Flashcards | 326 |
|---|---|
| Students | 14 |
| Language | Deutsch |
| Category | Physics |
| Level | University |
| Created / Updated | 09.02.2017 / 09.02.2020 |
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At hyperpolarization what current predominates?
current by K
half life is 50 years, how much time would pass for 1000 moleculces to decay to 125?
150 years
Rock 3km from submarine, how much time needed for the echo to come back when it travels at 1500m/s?
4 sec
High frequency are recognized by which part of the basilar membrane?
Closer to the oval window
What happens to the dark current when light hits the cell?
Decrease of glutamate release. Dark current is stopped
what would happen to blood flow if you increase the diameter of a vessel 3 fold?
81 times more blood would flow
Correct juxtaposition:
myasthenia gravis - motor end plate destruction, myotonia - cl- channel disfunction
Total optical power of a human eye is?
58diopter at flat lens,71diopter at thick lens average 60diopter
If the focal point is 10 cm in front of the eye then the optical power of the eye is?
D=1/0.1m
Van der Waals forces are?
Electrical forces between induced dipoles
What would decrease dipolar moment?
Either if the distance between charges is decreased or if the absolute value of charge is decreased
Entropy is?
Degree of disorder
According to Hess' Law in an isobaric/choric process Enthalpy is defined as?
Enthalpy is equal to the change in heat...if isobar and isochronic are equal
What will happen to free Enthalpy when the system is in equilibrium?
It will be minimum
chemical potential is the molecules ability to?
Energy required for introduction of 1 mole of substance into the system
Indicate in which case the energy of hydrogen bond is strongest
If the wavelength is increased by 100% and the velocity of the wave propagation is unchanged then:
The phenotypical properties of the medium changed and the density increased twice (by 100%) and the sound velocity (c) increased three (four times). Indicate how much the acoustic impedance has changed
The sound wave travels within the medium MI and enters the medium M2 crossing the interface between these two media. The acoustic impedances for M1 and M2 are 3kgm^2s and 1kgM^2s respectively. Indicate the value of reflection coefficient.
Indicate the phenomena that do not contribute to electrodiffusion:
Sound velocity:
Ultrasound beam is propagated through a soft tissue and enters one indicated below. Indicate when the reflection will be minimal:
Which phenomenon required the highest energy of photon:
The ultraviolet radiation is:
The sound waves:
A particle consisting of two protons and two neutrons are called:
Indicate the consequence of decrease in the value of the partition coefficient B (membrane-liquid partitioning) for the substancetransported through the membrane. Assume that the concentration of the transported substance on both sides of the membrane remain unequal and do not change the experimental observation.
The cell membrane (non-excitable cell) is stimulated with the current I. Assuming that the Cm is the membrane capacitance and Rm is the input resistance indicate the maximum change in the membrane voltage evoked by this stimulus.
When the input resistance of an excitable cell is increasing
Choose the correct statement for the neuromuscular junction:
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