The processing requirements include successful completion of: 1  The application process, which includes a background and polygraph examination, a medical examination, a physical fitness evaluation, and a written examination; 2  24-26 weeks of intensive Academy training.
The cell membrane, being exposed to the outside environment, is an important site of cell-cell communication. As such, a large variety of protein receptors and identification proteins, such as antigens, are present on the surface of the membrane.
Membrane Receptors Membrane receptor is a protein molecule that are specific to the cell membrane, (hormones, neurotransmitters, drugs) external molecules them, causing a change in cell function, was added. This process is called transduction: external signal, is introduced into the action.