Essential Cell Biology Flashcards Questions and Answers 2023

How do membrane proteins allow transport of non-permeable matter through the cellular membrane? - -Channels and transporters are what let non permeable matter inside the membrane. -Passive vs. Active Transport - -Passive transport there is no need of energy, the molecules will move according ton their gradient. With Active transport, there is a need of energy from pumps that harness energy to make things move against the concentration gradient. -What are the different types of transport proteins and how do they work? - -The channel is a tunnel like protein that are ion specific and look for charge and size. Transporters are specific proteins that let in only certain molecules, they look for shape, charge, and size, they make conformation changes when moving molecules. -Electrochemical gradient - -Determines the direction on ions and how they move across the membrane. -Membrane potential - -The difference between positive and negative charges across the membrane. When the number is the same on both sides of the membrane.