Which general type of membrane protein provides "assistance" for LARGE, CHARGED, and/or HYDROphilic Solutes to cross plasma membrane?
Process involving movement of substance (other than water) from a region of High Concentration to region of Low Concentration
A membrane, a Concentration Gradient, & a Transport Protein are required for _______ Diffusion.
Facilitated; No Energy is used
What's the main difference between Simple Diffusion & Facilitated Diffusion?
Facilitated = Need Protein
Simple = Does not
--The transport of substances that are unable to cross membrane by simple diffusion must be "facilitated" by proteins
True or False: Osmosis has no impact on membrane permeability
In order to communicate, cells produce ________ molecules that travel throughout the body of a multicellular organism & attach to _________ proteins found on or in ________ cells. The interaction of these molecules results in a __________ ____________ __________ that may turn on genes that help cell respond to message it has received.
signal transduction pathway
Maintaining the chemical composition of cytoplasm requires great deal of ______.