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Which of the following statements concerning the permeability of a typical nerve cell membrane at rest is true?
Wiki User
∙ 14y ago
The nerve membrane is freely permeable to potassium, although there is a Na+/K+ ATPase that pumps 3 Na+ in and 2 K+ out.
The resting potential is around -60mV to -70mV
The driving force of Na+ is inwards, as is Cl- and Ca2+, while the driving force of K+ faces outwards.
K+ wants to go down its concentration gradient (there is more K+ in the cell than out of the cell).
Na+ wants to go down its concentration and electrical gradient (it's more negative inside the cell and there's less Na+ there).
The permeability of a cell is determined by the number of channels it has, the length the channels are open, and the conductivity of each channel to a particular ion.
The Nernst potential for Na+ is +65, while it is around -95 for K+.
Wiki User
∙ 14y ago
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What feature of a membrane describes whether molecules can cross the membrane?
permeabiity
Which of the following factors does not affect membrane permeability?
The polarity of membrane phospholipids -Mastering Biology
Which part of the cell allows for selective permeability?
Cell membrane
Improper functioning or regulation of what might lead to poor regulation of membrane permeability?
plateletsplateletes"The following" means the list after the question.There is no list following this question.Fibrinogenalbumin fibrinogen platelets lymphocytes chloride ion levelsalbluminplatelets
What controls what passes in and out of cells?
Through something called "Selective permeability"
What feature of a membrane describes whether molecules can cross the membrane?
permeabiity
Which of the following factors does not affect membrane permeability?
The polarity of membrane phospholipids -Mastering Biology
What are facts about permeability?
Changes in permeability are changes in the number of compounds that can pass through a membrane. The presence of certain chemicals or radiation can change the permeability of a membrane.
What is the ability of a cell membrane to allow material to pass through it called?
permeability
Which feature of a membrane describes molecules whether can cross the membrane?
permeability
Which molecule of a membrane describes whether molecules can cross the membrane?
permeability
What is cell membrane permeability?
It is the ability of the membrane to allow ions and/or particles to cross.
What is the permeability of the cell membranes?
A membrane is selectively permeable.
What membrane allows materials to pass into and out of the cell?
Permeability
How does the permeability of the plasma membrane relate to homeostasis?
who the knows
Selective permeability refers to the fact that the plasma membrane keeps all molecules out of the cell?
Selective permeability refers to the fact that the plasma membrane can choose which molecules to let in or out of the cell.
What part of the membrane indicates how easy it is for substances to cross?
Permeability
