1 Bind to receptors in the plasma membrane of the target cell and bring about response without entering the cell. 2  These are called first messengers. 3  A second messenger is a molecule affected by the binding of a first messenger to a receptor. 4  e.g. adrenaline, insulin.
While it is correct, and good example of how to determine the size of 4mm, the picture of the ruler shown is not in direct proportional size to an actual ruler. 1mm is not as large as shown on the picture, nor would 4mm's be as large as 4 of the black marks pictured. 4mm is about 1/8th of an inch.
Â· just now. Report Abuse. there are 100 millimeters in a centimeter. 16.2(centimeters) x 100(millimerters per centimeter) = 1620 millimeters.LITTLE GREEN GOD Â· 9 years ago.eport Abuse. there are 100 millimeters in a centimeter. 16.2(centimeters) x 100(millimerters per centimeter) = 1620 millimeters. LITTLE GREEN GOD Â· 9 years ago.