A cell that carries out the final response or function of a particular process. The main effector cells of the immune system, for example, are activated lymphocytes and phagocytesâthe cells involved in destroying pathogens and removing them from the body.
Best Answer: Yes you can track it online here: https://tools.usps.com/go/TrackConfirmAc... The tracking number should look like this: CP 000 000 000 US. You can find it on the receipt, and the customs form you filled out.
To retrieve your USPS PIN follow these instructions: 1  Dial 1- 877-477-3273. 2  Press 1 when prompted, enter your Employee ID printed at the top of your earnings statement. 3  When prompted for your PIN, pause and then press 2. Your USPS PIN will be mailed to your address of record the next business day.