Phospholipids have a polar head a nonpolar tailbexplain how this allows them to spontaneously form the plasma membrane of the cell

The head of a phospholipid is hydrophilic and the tail is hydrophobic. Hydrophilic means that the head of the phospholipid like water. The hydrophobic tail does not like water, so the tails connect and the heads form a barrier around the hydrophobic tails which is turn makes a cell membrane. It has been a while since i was on this unit s. I might be wrong.

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

answer; /// i believe the name your looking for is called (plaque)or check good luck