4. PSP - BHS - Biology - Short Answers Study 4th - Create a Venn Diagram on Facilitated vs. Active

Active transport

Active Transport: requires energy in the form of ATP. Capable of moving solute particles against the conc. gradient (from low conc. to high conc.) Uses transport/carrier proteins (protein pumps) embedded in the plasma membrane. Carrier proteins are specific for the molecules that they allow through. The carrier protein changes shape which requires energy (ATP). It is the movement of molecules from areas of low concentration to areas where the molecule is found in higher concentration. This movement is not spontaneous and requires ATP energy and a protein carrier. The ATP is used to drive conformational changes in the protein to pump molecules against their concentration gradient. This process occurs continuously in nerve cell membranes with sodium-potassium pumps. The active transport animation shows a simplified version of how such a pump operates. Active transport requires chemical energy because it is the movement of biochemicals from areas of lower concentration to areas of higher concentration.

simiiar

Active and passive transport are biological processes that move oxygen, water and nutrients into cells and remove waste products. On the other hand, passive trasport moves biochemicals from areas of high concentration to areas of low concentration; so it does not require energy.

Create a Venn Diagram to compare and contrast facilitated diffusion and active transport. Include 2 ways they are similiar and 2 ways they are different

Facilitated transport and active transport both utilize proteins to transport substances across membranes. they are both substance transport.. Facilitated Diffusion: movement to area of lower concentration, glucose transport into muscle cell Active Transport: Requires energy (ATP), sodium ion transport out of cell Both: Movement across a membrane, movement assisted by proteins Active transport requires an input of energy, usually ATP, while facilitated transport does not. Active transport can transport chemicals against their concentration gradients while facilitated transport cannot. two diff: f.d.: the facilitated diffussion is a passive transport(which means it is a substance transport which requires no energy) which happens in the cell through the aids of those 'tunnels' or the proteins embedded in the cells' lipid bilayer enclosure. (the example of the substance in this transport are glucoseand urea) active transport: of course it requires energy,unlike the facilitated diffusion, which is an example of the passive transport. Hence it is active transport. examples: bulk transport- some wastes materials are too bulky to move in or out of the cell, so they mustbe packed first in a portion of the cell membrane before they can move from one place to another. plants' nutrient uptake: the plants'roots absorb water, minerals, etc against concentration gradients so it requires energy. so generally speaking, their diff is the energy necessity and their examples...

Facilitated diffusion

Particles always move with (down) a concentration gradient. Uses transport/channel proteins. Passive transport. Usually for specific molecules such as glucose. Facilitated diffusion stops at equilibrium. It is s the movement of a molecule from an area of high concentration to an area of lower concentration with the help of a protein channel or carrier. The generic molecules in the previous animation used a channel protein to enter the cell. In the facilitated diffusion animation both amino acids and glucose are shown entering the cell facilitated by a protein carrier. In a cell membrane there would be proteins specific to each molecule and the carriers would not be shared in this way. The animation shows that movement occurs until the concentration of the molecules reaches equilibrium.

2 ways different

The key difference is really that passive transport does not require energy whereas active transport does

Active transport

While active transport requires energy and work, passive transport does not.

Active Transport

active towards higher concentration Carrier protein and ATP energy Ions, sugars, and amino acids. Active transport is the mediated process of moving particles across biological membrane against a concentration gradient. If the process uses chemical energy, such as from ATP, it is termed primary active transport. Secondary active transport involves the use of an electrochemical gradient. Active Transport is: Endocytosis: a process of taking material into the cell by means of infoldings, or pockets, of the cell membrane (usually putting them into a vacuole). Phagocytosis -"Cell eating" Nonspecific molecules Intake of solids Pinocytosis -"Cell Drinking" Nonspecific molecules Intake of small droplets of liqu

Facilitate diffusion

is an example of passive diffusion, but aided by membrane-spanning channel proteins that span the lipid bilayer. Therefore the particles (molecules or ions) do not have to dissolve in the cell membrane's hydrophobic lipid bilayer, allowing hydrophylic and larger molecules (carbohydrates, ions) to be transported into the cell. No external source of energy is needed and travel across the membrane in the direction determined by their concentration gradients and, in the case of charged molecules, by the electric potential across the membrane (Cooper, 2000).

facilitated Diffusion

passive towards lower concentration Concentration gradient, plus channel or carrier proteins Water, glucose, and amino acids. Facilitated diffusion (or facilitated transport) is a process of diffusion, a form of passive transport facilitated by transport proteins. Facilitated diffusion is the spontaneous passage of molecules or ions across a biological membrane passing through specific transmembrane transport proteins.