The intake of Iodine in to the Thyroid Gland is an example of which of the followings means of molecular transpo?
Primary active transpo
Secondary active transpo
Facilitated diffusion
Endocytosis
Secondary active transpo or co-transpo, uses energy to transpo molecules across a membrane against a concentration/electrochemical gradient.In contrast to primary active transpo, there is no direct coupling of ATP; instead, the electrochemical potential difference created by pumping ions out of the cell is used. Primary active transpo, also called direct active transpo, directly uses energy to transpo molecules across a membrane. Facilitated diffusion is a type of passive transpo that allows substances to cross membranes with the assistance of special transpo proteins. Endocytosis is a process by which cells absorb molecules (such as proteins) by engulfing them.