why is cell membrane called selectively permeable membrane
Answers
Answer:
because it only permits selected substances or particles to enter in it . we can also call it as plasma membrane. the study model of plasma membrane is called fluid mosaic model given by singer and Nicholson. hope this helps u and if then pls follow me and Mark me as branliest.
Answer:
Explanation:
Oh, the NEURON cell membrane is even cooler - it has “dynamic permeability.” Selective permeability means that some small particles such as “ions” (single atoms of elements with electrical charges) are able to pass through tiny holes or “gates” in the membrane while other small particles are not - dynamic means actively changing, so the neuron cell membrane gates are changing all the time depending on the chemical and electrical signals it receive —
In general, changes in membrane permeability are either: 1. excitatory which allow more positive ions in and make the neuron’s electrical charge closer to threshold for an action potential or 2. inhibitory which allow more negative ions in the cell driving the cell’s electrical charge more negative or further from threshold. Which kind of electrical changes happens depends on which ion gates or channels are opened in the membrane which is essentially the effect of the neurotransmitter than binds with that cell’s nero-receptors.
Neuron cell membranes also contain active “ion pumps” which can move ions in or out to “restore” the cell’s resting electrical potential after an action potential also known as a “nerve impulse”.
These features of the cell membrane are extremely important for cell function in general and for understanding brain function.