How to prepare for your annual encounter with confusion. Daylight Saving Time ends Sunday at 2 a.m., which means that weâre all going to spend a few minutes scratching our heads trying to figure out whether weâre gaining or losing an hour of sleep. Save yourself the trouble and let TIME break it down for you.
For example, plasma membrane proteins carry out functions as diverse as ferrying nutrients across the plasma membrane, receiving chemical signals from outside the cell, translating chemical signals into intracellular action, and sometimes anchoring the cell in a particular location (Figure 4).
Transport Proteins. Transport proteins, the final type of integral protein, extend through the membrane and transport materials in and out of the cell. Some transport proteins actively move materials in and out of the cell, while other simply provide an opening for materials to passively move.hospholipids make up the membrane and create the barrier between the cell's contents and area outside the cell. Two types of proteins are found in the cell membrane: integral and peripheral proteins.