
Question 16 The resting membrane potential of the nerve cell is O-10v +30mv -30mv O-70mv Question...
At resting membrane potential (-70mV), there are more sodium ions inside the cell than there are outside the cell. True or False?
if you were able to record the actual resting membrane potential of a single cell in this nerve would you see a normal resting potential? why or why not? how is an action potential propagated down the axon? include when each channel opens. Thank you!
A cell has a resting membrane potential of -70mV. In each of the following cases, would the cell depolarize, or hyperpolarize? Justify your answers with a written explanation that relates to the GHK equation; you do not need to calculate new membrane potentials, but you should explain why the changes would occur. Hint: Use the simulations from class to solve these Cell becomes more permeable to Cl- Cell becomes more permeable to Ca++ (Hint: which ion shown in the simulation...
With respect to the membrane potential which of the following is NOT true? A. In resting cells, the membrane potential is negative because sodium ions are less permeable than potassium ions. B. The resting potential of the nerve cell depends on voltage gated potassium channels C. While chloride is much more permeable than sodium, it adds relatively little to the negative membrane potential. D. The concentration of chloride inside/outside the cell is the reciprocal of the potassium concentration of the...
Correct answer is 51.1 mV
4. Magnitude of the revereal potential oreated by nerve cell discharge. A nerve cell (resting potential 75 mv: inside negative) fires when some stimulus affects the nerve cell membrane and causes it to suddenly become highly permeable to Na ions. Depolarization occurs as Na ions rush inside the cell. At the height of this process, enough Na ions are inside the cell to actually make the interior positively charged relative to the exterior; that is,...
When a nerve cell depolarizes, charge is transferred across the cell membrane, changing the potential difference. For a typical nerve cell, 9.0 pC of charge flows in a time of 0.50ms . What is the average current?
1. The chemical reasons for the value of the resting membrane potential for a typical neuron (-70mV) and the electrochemical forces that act on sodium and potassium. Know the role of the Na+/K+ pump. What is a K+ leak channel? 2. Describe the events at a synapse during neurotransmission including how a neurotransmitter is released from the presynaptic cell (calcium triggers exocytosis), and what determines the effect that a neurotransmitter will have on the postsynaptic cell. 3. A function of:...
Nerve cells maintain a charge separation across their cell membrane. The cell membrane in a particular cell is 12 nm thick and the cell can be modeled as a cylinder with a diameter of 12 μm and a length of 75 μm. If the potential difference across the cell membrane is 120 mV, what is the charge stored on the cell? (Assume that the dielectric constant of the cell membrane is 1.0.)
1. Consider a typical cell at its resting membrane potential
(rest Vm). The membrane temporarily becomes more permeable to Na+.
Ena = +55mV, resting Vm = -60mV How would the change in membrane be
represented in a graph of Vm vs. time?
a. no change b. Graph B c. Graph
C
Please explain why the right answer is correct and why the wrong
answers are incorrect.
PLEASE ANSWER WITH UNITSNerve cells maintain a charge separation across their cell membrane. The cell membrane in a particular cell is 13 nm thick and the cell can be modeled as a cylinder with a diameter of 11 um and a length of 90 um. If the potential difference across the cell membrane is 50 mV, what is the charge stored on the cell? (Assume that the dielectric constant of the cell membrane is 1.0.)