Biophysics Final
Optics, Hearing, NMR, Thermodynamics etc.
Optics, Hearing, NMR, Thermodynamics etc.
Fichier Détails
Cartes-fiches | 47 |
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Utilisateurs | 16 |
Langue | English |
Catégorie | Physique |
Niveau | Université |
Crée / Actualisé | 23.01.2017 / 31.01.2019 |
Lien de web |
https://card2brain.ch/box/20170123_biophysics_final
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Considering the flow of ideal (non-viscous) fluid through a cylindric vessel, indicate how will change the velocity of the fluid flow if the vessel’s length is increased 3 times (we assume that the pressure inducing the flow does not change):
If we measure, for the sake of experiment, the blood pressure to a subject in the standing position and the cuff is placed on the part of the arm kept high above the head, then the measured values of systolic/diastolic pressures will read:
When a viscous fluid is transported through a cylindrical vessel of constant diameter and under a constant pressure,
Parameter Q defines the volume of viscous liquid transported per unit time through a cylindrical vessel. If the radius of the vessel are reduced by 50% and its length is increased twice (100% increase) how much the parameter Q will change (assuming that all other parameters including pressure and liquid viscosity remain the same) ?
Indicate the orders of magnitude for number of photoreceptors and ganglion cells in the human eye retina
A symmetrical spherical lens changed its shape by increasing the curvature radius 4 times. How such a deformation will affect the optical power ?
When the degree of order in the isolated system increases
Thermodynamically, the process of diffusion can be regarded as
For the open system the chemical potential (µ) for a given compound can be described as
When cells are suspended in a hypotonic solution:
In the harmonic movement a particle is oscillating around the equilibrium point and A denotes the amplitude i.e. the maximum absolute distance of particle from the equilibrium point. Indicate the situation in which the absolute value of the harmonic force (F) is reaching its maximum: (y – distance from equilibrium point, -A ≤ y ≤ A).
- If the medium density increases two times but the speed of acoustic wave propagation does not change then the acoustic impedance is
The incoming acoustic stimulus has induced a deformation of the basilar membrane very close to the oval window. We may deduce that the detected voice
Relaxation time T1 describes the process (symbols: Mz is the component of magnetization M parallel to external magnetic field Bo)
- Find the true statement
Human ear shows the highest sensitivty for sounds characterized by Frequencies:
Blood velocity in the vessels can be estimated when applying:
Indicate proper statement regarding X and gamma rays
The feature that a lens focuses the light not at a focal point but at a blurred spot is referred to as:
Typically, the wavelength of absorbed photon is:
The energy of interaction between the magnetic moment and the external magnetic field is minimal when:
In the MRI scanning, the gradients of magnetic field are used to:
Indicate in which units is measured the ECG signal:
Indicate where in the heart tissue, the propagation of excitability occurs with the lowest velocity
Sensory neurons are typically:
In the electrolyte, local intensity of electric field
Assuming that the membrane voltage is 100 mV and the membrane thickness is 10 nm, the intensity of electric field is:
The intracellular concentration of chloride ions is increased while the extracellular one remains unchanged. Indicate how this change will affect the value of the equilibrium potential for chloride ions (VCl).
In an electrophysiological experiment the number of moles of electrical charges per membrane surface unit and per unit time is determined. The name of the physical quantity measured in this experiment is:
The phenomenon of diffusion is quantitatively described by:
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