BRS Phys 1 Cell Physiology
Terms
undefined, object
copy deck
- Proteins that span the entire cell membrane
- Integral proteins
- Membrane proteins that include Ion channels and Transport proteins
- Integral proteins
- Membrane proteins that are located on either the intracellular or extracellular side of the cell
- Peripheral proteins
- Membrane proteins that include Hormone receptors
- Peripheral proteins
- Zonula occludens alternate name
- Tight junction
- 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
-
Tight jxn (Zonula occludens) -
Are attachments between cells that permit intercellular communication
-Example: permit current flow and electrical coupling between Myocardial cells -
Gap junctions - Describe the Na+, K+ ATPase pump
-
-transports 3 Na+ out of cell against its gradient
-transports 2 K+ into the cell against its gradient - What are 2 drugs that inhibit the Na+/K+ ATPase pump?
-
Oubain
Digitalis - Where is the H+/K+ ATPase at and what does it do?
-
Gastric Parietal Cells
transports H+ into the stomach lumen against its gradient - What drug inhibits the H+/K+ ATPase (proton pump) in Parietal Cells?
- Omeprazole
- Describe the Na+/glucose cotransport system in the intestinal mucosa and renal proximal tubule cells
-
-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 - The flow of water across a semipermeable membrane from a solution with low solute concentration to a solution with high solute concentration
- Osmosis
- When does Osmotic Pressure increase?
- when the solute concentration increases
- Which has a higher Osmotic pressure: 1 M CaCl2 or 1 M KCl?
- 1 M of CaCl2 b/c it has 3 particles compared to 2
- Is the concentration of osmotically active particles in a solution
- Osmolarity
- What is the osmolarity of 1 M NaCl?
- 2 particles X 1 M = 2 osm/L
-
If the Reflection Coefficient is 1, the solute is _______.
What is an example? -
Impermeable
Albumin -
If the Reflection coefficient is 0, the solute is ______
What is an example? -
completely permeable
Urea = does not exert any osmotic effect