Flashcards
Transport accross a cell membrane
Flashcards do conjunto (21)
- 1Passive, random movement of uncharged particles from regions of high to regions of low concentration.Simple diffusion
- 2Cell mediated movement from regions of high concentration to regions of low concentration for larger particles; requires no extra energy, carrier protein changes spontaneouslyFacilitated diffusion
- 3Movement of a solvent, through a semi-permeable membrane to create an equal concentration of solute molecules.Osmosis
- 4—Osmosis
- 5—Simple diffusion
- 6—Facilitated diffusion
- 7Uses energy from to transport material against a gradient; that can be concentration, pressure, osmotic or voltagePrimary active transport
- 8What is the sodium potassium pump?it is the most common primary active pump found in most cell membranes. It is responsible for maintaining the high potassium low sodium levels of the intracellular fluid.
- 9—Sodium potassium pump: a primary active pump
- 10Primary active pump found in the sarcoplasmic reticulum (SR) of muscle cells. Moves ions back in to SR after contraction.Calcium pump
- 11Movement of one type of molecule is brought about due to a change in shape of the carrier protein caused by another molecule being transported.Secondary active transport
- 12What is a uniporter?A membrane protein which can transport a single particle in one direction – e.g. facilitated diffusion of glucose
- 13What are symporters?Membrane proteins which can transport two particles in the same direction – e.g. secondary active glucose transport
- 14What is an antiporter?A membrane protein which can transport molecules in opposite directions – e.g. sodium / calcium and sodium / hydrogen exchangers
- 15Process which transports particles into the cell by trapping them in vesicles produced from the cell membrane.Endocytosis
- 16Process which transports particles out of the cell in to the ECF with using vesicles produced by the cell membrane.Exocytosis
- 17The name given to the difference in voltage between the inside of the cell and the outside of the cell, across the cell membrane.Membrane potential
- 18The inside of the cell membrane generally has a more positive, or negative charge?Negative
- 19The outside of the cell membrane generally has a more positive, or negative charge?Positive
- 20How many mV is the membrane potential of cardiac cells?-90mV
- 21How many mV is the membrane potential of red blood cells?-10mV
Informações
- Descrição
- Anatomy and Physiology FlashCards sobre Transport accross a cell membrane, criado por Kirsty Lesniak em 21-09-2013.
- Criado por
- Kirsty Lesniak
- Visualizações
- 811
- Tags
- Avaliação