Indicate the interval(s) that best correlate with each statement More than one l
ID: 3476404 • Letter: I
Question
Indicate the interval(s) that best correlate with each statement More than one letter may apply to each statement. +55mV Voltage OmV threshold AB 70mV time Select from intervals a, b, c, d, e or AB. 51. Permeabilit to K is still elevated even as the Na' permeability has returned to normal, resting values 52. The membrane is more permeable to K+ than to Na", and these permeabilities are not increasing or decreasing, but are constant and unchanging. 53. The membrane is experiencing rapid changes in Na" permeability. 54. Na' and K' are both at equilibrium (ie. in direction to the chemical gradient.) 55. Time during which Na" K pump is working. 56. The event shown above can be experienced by a) All cells of the body b) Only neurons and muscle cells 20Explanation / Answer
The figure depicts the graphical representation of ACTION POTENTIAL in cell membrane ,
voltage measured across the cell membrane against time, theaction potential begins with depolarization, followed by repolarization, which goes past the restingpotential into hyperpolarization, and finally the membrane returns to rest.
answers
Q 51. the corresponding interval is E
explanation - since the interval E is the phase of repolarisation characterised by increased permeability to K+ levels even permeability of Na is normal resting level
Q 52 The corresponding interval is AB
explanation - since the interval is the phase of HYPERPOLARISATION , Characterisd by more permeability to k than Na , and permeabilites are not increasing or decreasing and are constant and changing
Q 53. The corresponding interval is B and C
EXPLANATION - Since this interval is the phase of DEPOLARISATION , in which there is rapid change of Na permeability leading to generation of required threshold potential above resting membrane potential in order to generate required action potential
Q 54. The corresponding interval is A
EXPLANATION - Since this is the phase of resting membrane potential where both Na and K+ are at equibilirium
Q 55. The corresponding interval is from B,C,D,E to AB
EXPLANATION - since this is the phase when the Na + and k+ pump works exhibiting all different phases of action potential
Q 56. The above event of action potential is seen in answer is B that is in neurons and muscles cells