In most companies, they're just different names for the same role. They're all typically the person who either does outbound calling for an account rep or who answers inbound leads, filtering them for an account rep. The typical progression is the following: BDR, SDR, LDR - development rep. Answers inbound leads, makes outbound calls, generates new opportunities for a rep. Sales Rep, Account Rep, Account Executive - salesperson. does the actual selling, builds longer term relationships, closes deals.
The plasma membrane is the outer lining of the cell. It separates the cell from its environment and allows materials to enter and leave the cell. Ribosomes. Ribosomes are organelles that process the cellâs genetic instructions to create proteins.
If the Cell is a plant Cell, the Cell membrane  is inside of the Cell wall. It is semi-permeable, so water can move  freely into and out of the cell. Nutrient particles and gas  exchange occur where some molecules enter and waste products leave  through the Cell membrane. cell membrane protects a cell by controlling what substances go in and out of the cell. It lets good products go inside, but harmful products go out, which is basically prot â¦ ecting the cell.