True or false? When the nerve cell is excited, it becomes more permeable to potassium ions...
Homework Answers
False - When nerve cell is excited, it becomes more permeable to sodium ions than potassium ions. This because the sodium channels are opened while the potassium channels are closed.
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True or false? When the nerve cell is excited, it becomes more
permeable to potassium ions...
With respect to the membrane potential which of the following is NOT true? A. In resting...
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...
The concentration of potassium ions inside a nerve cell is around 25 times that outside the...
The concentration of potassium ions inside a nerve cell is around 25 times that outside the cell. Calculate the potential difference between inside and outside a nerve cell, if it depends only on this ionic imbalance. For simplicity, pretend that the temperature = 25°C (standard) even though body temperature is higher than that. (10 marks)
In its resting state, the membrane surrounding a neuron is permeable to potassium ions but only...
In its resting state, the membrane surrounding a neuron is
permeable to potassium ions but only slightly permeable to sodium
ions. Thus, positive K ions can flow through the membrane in an
attempt to equalize K concentration, but Na ions cannot as quickly.
This leads to an excess of Na ions outside of the cell. If the
space outside the cell is defined as zero electric potential, then
the electric potential of the interior of the cell is negative.
This...
Correct answer is 51.1 mV 4. Magnitude of the revereal potential oreated by nerve cell discharge....
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,...
Potassium, sodium, and chloride ions are involved in fluid balance. a.) true b.) false
Potassium, sodium, and chloride ions are involved in fluid balance. a.) true b.) false
At resting membrane potential (-70mV), there are more sodium ions inside the cell than there are ...
At resting membrane potential (-70mV), there are more sodium ions inside the cell than there are outside the cell. True or False?
When a nerve cell is stimulated electrically, mechanically, or chemically, the permeability of the cell membrane...
When a nerve cell is stimulated electrically, mechanically, or chemically, the permeability of the cell membrane changes and sodium ions (Na+) can diffuse more readily into the cell. If 1.5 x 106 Na+ ions move through the membrane in 5.0 ms, what is the corresponding electric current?
The lipid bilayer is most permeable to phosphate ions water molecules potassium ions small proteins Compared...
The lipid bilayer is most permeable to phosphate ions water molecules potassium ions small proteins Compared to water, a lipid bilayer freely allows the passage of glucose is impermeable to ions prefers negatively charged molecules is permeable to small proteins Cell membranes have only phosopholipids are formed from liposomes have proteins with different kinds of attachments none of the above
Question 61 The ATP dependent sodium-potassium pump forces potassium ions the cell and sodium ions the...
Question 61 The ATP dependent sodium-potassium pump forces potassium ions the cell and sodium ions the cell. out of, out of out of into into; out of into: into
Order the following events that occur in a neuron in response to a stimulus Sodium Potassium...
Order the following events that occur in a neuron in response
to a stimulus
Sodium Potassium Pumps and Potassium Leak Channels re-establish the resting potential Voltage Gated Potassium channels close The inside of the cell becomes more negative than the original resting potential V Voltage Gated Sodium channels open Sodium ions rush into the cell The inside of the cell becomes temporarily positive Votage Cated Potatalum channels open which causes potassium to flood out of the cell
The concentration of potassium ions inside a nerve cell is around 25 times that outside the cell. Calculate the potential difference between inside and outside a nerve cell, if it depends only on this ionic imbalance. For simplicity, pretend that the temperature = 25°C (standard) even though body temperature is higher than that. (10 marks)
In its resting state, the membrane surrounding a neuron is
permeable to potassium ions but only slightly permeable to sodium
ions. Thus, positive K ions can flow through the membrane in an
attempt to equalize K concentration, but Na ions cannot as quickly.
This leads to an excess of Na ions outside of the cell. If the
space outside the cell is defined as zero electric potential, then
the electric potential of the interior of the cell is negative.
This...
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,...
Question 61 The ATP dependent sodium-potassium pump forces potassium ions the cell and sodium ions the cell. out of, out of out of into into; out of into: into
Order the following events that occur in a neuron in response
to a stimulus
Sodium Potassium Pumps and Potassium Leak Channels re-establish the resting potential Voltage Gated Potassium channels close The inside of the cell becomes more negative than the original resting potential V Voltage Gated Sodium channels open Sodium ions rush into the cell The inside of the cell becomes temporarily positive Votage Cated Potatalum channels open which causes potassium to flood out of the cell
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