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Carrier Mediated TP
KCKCC Bannister Spring 2011-Chapter 3
| Question | Answer |
|---|---|
| Much of the cation-anion difference is made up by | protein anions |
| If an anion gap 13 or less | electrolyte balance in the body is fine |
| 2 types of carrier-mediated transport | Facilitated diffusion and active transport |
| Facilitated Diffusion | aka facilitated transport |
| Active Transport | Uses ATP to bring in stuff through pores |
| Facilitated diffusion requires a | protein pore molecule in the membrane |
| A protein pore molecule is a | trans-membrane protein |
| Facilitated diffusion is net movement of molecules or ions from regions of | high concentration to areas of lower concentration. |
| Facilitated Diffusion is(active or passive) transport? | passive |
| Energy for facilitated diffusion is________energy of the molecules or ions | kinetic |
| Cellular metabolism (does or does not) provide energy for facilitated diffusion? | does not |
| ATP(is or is not) needed for facilitated diffusion? | is not |
| Glucose is always higher | outside of the cell |
| Protein pores that admit glucose are only open when insulin is bound to an_______receptor protein. | insulin |
| Glucose(does or does not) require ATP energy to enter a cell? | does not |
| Facilitated diffusion of glucose into a cell goes(down or up) the concentration gradient. | down |
| Glucose levels are always(high or low) inside cells because glucose is always being________in cells | used up |
| Primary active transport | requires energy in the form of ATP. |
| Primary active transport always goes (down or up) the concentration gradient. | up |
| Na/K pump: Extracellular fluids include blood______ and _____________fluid | plasma, interstitial |
| extracellular fluids: Na+ levels are always(high or low) and K+ levels are always(high or low) inside cells. | high; low |
| Intracellular fluids: Na+ levels are always (high or low) inside cells | low: high |
| Intracellular fluid: the Na+/ K+ pump uses ATP energy to pump Na+ (out of or into) and pumps K+ (out of or into). | Out of: into |
| Active Transport of one substance | allows another substance to also come in with it or against it(in the other direction) |
| Co-transport | 2 molecules going in the same direction |
| ________follows Na+ from lumen to interstitial fluid in small intestine. | Glucose |
| Epithelial transport | movement of molecules across tight cell membranes. |
| Epithelial transport | Intestinal lumen -> lumen-facing membrane -> epithelial cytosol -> blood-facing membrane -> interstitial fluid ->blood |
| Food and nutrients pass through epithelial cells of the | lumen of the small intestine |
| Oxygen passes through_________cells of the _________. | epithelial; lungs |
| Equilibrium potentials: the inside of a cell membrane tends to be electrically (negative or positive). | negative |
| Equilibrium potentials: the outside of a cell membrane tends to be electrically (negative or positive). | positive |
| cations tend to pass __________cells. | out of |
| Anions tend to pass_______cells | into |
| the passage of anions and cations across the membrane is call the | electrochemical gradient |
| Resting Membrane potential | about -70 mV |
| Roles of the Na/K pumps: | 1.maintains extracellular and intracellular Na+ and K+ levels. 2. Maintains the electrochemical gradient. |
| Under normal conditions, _________ is normal brain food. | glucose |
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