Biophysics

104) Which of the following statements below is correct?

 

105) When the membrane potential is at its resting level

 

110) Inactivation of sodium channels:
 

112) Neuromuscular transmission results in:

 

113) In the closed system, when the volume of the system is compressed (a small volume change), the internal energy will change by (p-pressure, T-temperature and K- constant):
 

114) For the ideal fluid, when the pressure is constant and the diameter of the tube is increased 2-fold, the
velocity of the flow will:
 

116) the mechanism underlying “one way” propagation of action potential is

 

117) the term “population invasion” is used to describe the following situations

 

118) the correct description of chromatic aberration is given by

 

121) The depolarization of hair cells is caused by
 

122) Let Re denote the Reynold number, the flow is lamina

 

123) The average pressure difference driving the blood flow.. about

 

127) In chemical synapse postsynaptic potentials are generated
 

129) In excitatory and inhibitory system synapses the postsynaptic potentials are as follows

 

130) in neuro-muscular junction AChR proteins are located mainly

 

131) in striated muscle cells the contraction is triggered by increase of calcium concentration. Calcium ions
enter sarcoplasm from
 

133) spontaneous depolarization

 

138) Bernoulli's equation describes the formula:

 

139) The speed of sound is best transmitted

 

141) Ruby laser:

 

142) In the phase of repolarization during the action potential:

 

144) All or nothing:

 

145) The reverse piezoelectric effect:

 

158) The diameter of a cylindrical artery transporting a viscous fluid (blood) was reduced by 1/3 (approximately by 33%). Indicate a true sentence

 

160) Acetylcholine

 

162) The velocity propagation of the pulse wave along the arterial vessels is

 

163) What happens to the optical power of a symmetrical lens if one of its curvature radii gets 50% shorter
and the other remains unchanged?
 

165) The closed system containing the ideal gas is expanding (increasing its volume) without exchanging
heat with the environment. The internal energy of this system is:
 

166) Indicate how the average kinetic energy (Ek) of gas particle is related to the gas temperature T ( in
Kelvin scale):
 

167) The entropy (measure of systems disorder) is (p - pressure, Ω - number of microstates
characterizing a given macrostate, V - Volume, R - gas constant, Q - Heat, T - temperature)
S = k * ln (Ώ)
 

168) In the state of equilibrium in the closed system the value of the free enthalpy
 

173) The considered system can be found in the two states: state S1 characterized by the energy U1 and
state S2 characterized by the energy U2. If U1 > U2 then
 

176) In the interaction described by Van der Walls (A,B – constant >0, r is distance)
 

177) A hydrogen bond is formed between the OH group and an Oxygen atom from water. Choose true
statement:
 

178) Indicate the effect of hydrogen bonding water

 

181) Acoustic pressure is
 

182) If an artificial membrane contains non-selective channels only (i.e. channels permeable equally to
anions and cations), the resting membrane potential will take the value: (assume that electrolytes
surrounding the membrane are physiological, i.e. on one side cytoplasmatic and on the other -
extracellular)
 

185) GABAA receptors are

 

187) Corpuscular radiation is/are:

 

188) Consider a probe consisting of a certain amount of one type of radioactive element. The radioactive
decay law predicts that the number of nuclei of considered isotope will