How the movement of ions across plasma membrane of neuron is maintained? Show with sketch only.

Simultaneous movement of two molecules across a membrane in same direction is known as:

Show the various modifications of plasma membrane with the help of sketch.

Name the two ions which cannot move across the resting membrane of neuron.

How do neutral solutes move across the plasma membrane? Can the polar molecules also move across it in the same way? If not, then how are these transported across the membrane?

The potential difference across the membrane of nerve fibre when it does not show any physiological activity ,is called resting potential .It is about:

Column - I and Column - II contains four emtries each. Entries of Column -I are to be matched with some entries of Column - II . One or more than one entries of Column -I may have the matching with the same entries of Column - II. {:("column-I","column-II"),("(A) peptization ","(P) preparation of sols "),("(B) Ultra centrifugation ",(Q) " Purification of sols "),("(C) Electrodialysis","(R) perparation of metal sols "),("(D) Breding's arc method ","(S) movement of ions acress the membrane in prsence of electric field "):}

Give the biochemical composition of plasma membrane. How are lipid molecules arranges in the membrane?

List the factors which govern the movement of substances across membrane.