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19 Cards in this Set
- Front
- Back
Proteins that span the entire cell membrane
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Integral proteins
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Membrane proteins that include Ion channels and Transport proteins
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Integral proteins
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Membrane proteins that are located on either the intracellular or extracellular side of the cell
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Peripheral proteins
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Membrane proteins that include Hormone receptors
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Peripheral proteins
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Zonula occludens alternate name
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Tight junction
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Attachments between cells that may be an intercellular pathway for solutes, depending on size, charge, and characteristics of the particular things I'm asking about
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Tight jxn (Zonula occludens)
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Are attachments between cells that permit intercellular communication
-Example: permit current flow and electrical coupling between Myocardial cells |
Gap junctions
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Describe the Na+, K+ ATPase pump
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-transports 3 Na+ out of cell against its gradient
-transports 2 K+ into the cell against its gradient |
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What are 2 drugs that inhibit the Na+/K+ ATPase pump?
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Oubain
Digitalis |
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Where is the H+/K+ ATPase at and what does it do?
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Gastric Parietal Cells
transports H+ into the stomach lumen against its gradient |
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What drug inhibits the H+/K+ ATPase (proton pump) in Parietal Cells?
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Omeprazole
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Describe the Na+/glucose cotransport system in the intestinal mucosa and renal proximal tubule cells
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-works by Secondary Active Transport
-Na+ is pumped out of the cell by the Na+/K+ ATPase -this creates a downhill gradient for Na+ and glucose to come into the cell -poisoning the Na+/K+ pump stops the Na+/glucose cotransport |
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The flow of water across a semipermeable membrane from a solution with low solute concentration to a solution with high solute concentration
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Osmosis
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When does Osmotic Pressure increase?
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when the solute concentration increases
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Which has a higher Osmotic pressure: 1 M CaCl2 or 1 M KCl?
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1 M of CaCl2 b/c it has 3 particles compared to 2
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Is the concentration of osmotically active particles in a solution
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Osmolarity
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What is the osmolarity of 1 M NaCl?
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2 particles X 1 M = 2 osm/L
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If the Reflection Coefficient is 1, the solute is _______.
What is an example? |
Impermeable
Albumin |
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If the Reflection coefficient is 0, the solute is ______
What is an example? |
completely permeable
Urea = does not exert any osmotic effect |