Quick Answer. The function of a synaptic knob is to change the action potential that is carried by axons into a chemical message. The chemical message then interacts with the recipient neuron or effector. This process is called synaptic transmission.
Over-the-counter (OTC) medicines that are recommended for head or pubic lice include: 1  Permethrin creme rinse 1% (such as Nix), which is a common first choice for treating head lice. 2  Shampoos containing pyrethrins and piperonyl butoxide (such as Rid), which are left on the hair for 10 minutes and then rinsed out.
To get rid of head lice, the most common treatment is to kill the adults with a pediculocide and to clear out the nits with a special fine-toothed comb. Pyrethrins are a common treatment that is available over the counter.. Some studies suggest pyrethrins can affect cognitive development in children.ermethrin lotion 1% (also known as Nix) is another over the counter product which also only kills lice, but not eggs, and will require repeat treatment in nine to 10 days. Malathion lotion 0.5% (also known as Ovide) is a prescription medication that is approved for head lice and can kill some eggs.