The dilating drops that we typically use last, on average, 4-6 hours before they wear off. Occasionally, we use longer lasting eye drops in younger children, which can last approximately 24 hours.Most people do feel comfortable to drive after their pupils have been dilated.However, if you have never had your pupils dilated before (and therefore don't know if you will feel safe or not), we recommend that you bring a driver or arrange for someone to pick you up after your exam.ost people do feel comfortable to drive after their pupils have been dilated. However, if you have never had your pupils dilated before (and therefore don't know if you will feel safe or not), we recommend that you bring a driver or arrange for someone to pick you up after your exam.
The cell membrane (also known as the plasma membrane or cytoplasmic membrane) is a biological membrane that separates the interior of all cells from the outside environment. The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells. The basic function of the cell membrane is to protect the cell from its surroundings. It consists of the phospholipid bilayer with embedded proteins.
Neurons carry out their specialized functions of communication and integration because their outer cell membrane has special properties. The cell membrane separates the inside of a cell (all cells, not just neurons) from the outside, and all chemicals that get into and out of the cell must go thorough it. As in all cells, the cell membrane of a neuron is polarized. This means that there is an electrical difference across the cell membrane. The polarization of a cell can be measured by putting a very thin electrode inside a cell, as illustrated in Figure 3.