Across
- 4. pump, ,an enzyme in the membrane that pumps calcium ions out of the cell
- 6. ,a positively charged ion
- 9. driving force, ,difference in actual membrane potential and a specific ion’s ionic equilibrium potential
- 10. ,a positive change in membrane potential from -65mV
- 12. ,a negatively charged ion
- 13. membrane potential, ,the electrical charge difference in the membrane when action potentials are not occurring
- 14. ,a single atom or an entire molecule that has a net electrical charge
- 15. pump, ,proteins embedded in the phospholipid bilayer that uses ATP as an energy source to transport ions across the membrane
Down
- 1. potential, ,force exerted on a charged particle, measured in Volts
- 2. potassium pump, ,an enzyme in the membrane that pumps 3 sodium ion out for every 2 potassium ion it pumps in, uses ATP because it moves the ions against their concentration gradient
- 3. brain barrier, ,a specialization of the walls of brain capillaries that limits the movement of bloodborne substances into the extracellular fluid of the brain
- 5. ,a property of some ion channels to open or close
- 7. potential, ,voltage across the neuronal membrane
- 8. potential, ,aka nerve impulse, spike, or discharge; it is brief condition where the inside side of the membrane becomes more positive instead of negative
- 11. bilayer, ,the double sheeted neuronal membrane made of phospholipids, studded with proteins