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-70 mV this potential difference in a resting neuron (Vr) is called the resting membrane potential, and the membrane is said to be polarized.
What else can I help you with?
Why does the polarity of a cell membrane reverse during an action potential?
The reversal of polarity during an action potential is due to the changes in ion concentrations across the cell membrane. When the membrane depolarizes, sodium ions rush into the cell and make the inside more positive. Repolarization occurs when potassium ions leave the cell, bringing the membrane potential back to negative.
What is a factor that determines whether molecule can cross a cell membrane?
size/ polarity can be the factors
Do epithelial tissues always exhibit polarity?
Yes, epithelial tissues typically exhibit polarity, with distinct apical and basal surfaces. The apical surface faces the external environment or a body cavity, while the basal surface is anchored to a basement membrane. This polarity allows for the specialized functions of epithelial cells, such as secretion and absorption.
What to substances control the movement of the materials into and out of the cell?
Some of the proteins and lipids do control movement of materials into and out of the cell.
What problems are there with reverse polarity?
Reversing polarity ,changes the rotation of the device you are changing polarity on.
Which of the following factors does not affect membrane permeability?
The presence of membrane proteins does not directly affect membrane permeability. Membrane proteins mainly play a role in transport, signaling, and cell recognition rather than impacting the permeability of the membrane itself.
What is a factor that determines of a molecule can cross a cell membrane?
Polarity
How is the cell membrane selectively permeable?
The pores of the cell membrane only allow objects of a certain size or polarity through. The lipids that make up the membrane have a certain polarity at the head and tail and only certain objects are allowed through because of this.
Which is a factor that determines wether a molecule can cross the cell membrane?
Polarity
What is a factor that determines whether a molecule cross a cell membrane?
size/ polarity can be the factors
Why does the polarity of a cell membrane reverse during an action potential?
The reversal of polarity during an action potential is due to the changes in ion concentrations across the cell membrane. When the membrane depolarizes, sodium ions rush into the cell and make the inside more positive. Repolarization occurs when potassium ions leave the cell, bringing the membrane potential back to negative.
What is a factor that determines whether molecule can cross a cell membrane?
size/ polarity can be the factors
What is the main factors that influences membrane permeability?
The best answer here is probably polarity but size is the second runner up.
What is a factor that determines if a molecule can cross a cell membrane?
size/ polarity can be the factors
What are two characteristics of a molecule that will keep it from passing through a membrane and how does each keep the molecule from passing through?
size and polarity
Do epithelial tissues always exhibit polarity?
Yes, epithelial tissues typically exhibit polarity, with distinct apical and basal surfaces. The apical surface faces the external environment or a body cavity, while the basal surface is anchored to a basement membrane. This polarity allows for the specialized functions of epithelial cells, such as secretion and absorption.
What is the core of microvilli?
The core of microvilli is attached to the plasma membrane. It also contain a bundle of about 40 filaments of actin.
