Chapter 2 Cellular Physiology Flashcards
What does the nucleus contain?
Nucleus contains Deoxyribonucleic acid (DNA)
What does The cytoplasm contain?
The cytoplasm contains organelles
What are the three important functions of lipid Bilayer?
It forms the basic structure of membrane (**fence ** around the cell)
It’s hydrophobic interior serves as a barrier to passage of water soluble substances between ICF and ECF
It Is responsible for the fluidity of the membrane
What are the three types of membrane transport?
Passive transport
Active transport
Endocytosis and EXocytosis
What is the only form of transport which doesn’t require metabolic energy?
Passive transport———simple diffusion
Solution A and B are separated by a membrane that is Permeable to urea. solution A is 10 mm urea . If the Concentration of the urea in solutionA is doubled , the flux of urea across the membrane will ?.???
Triple
Define facilitated diffusion?
When carrier proteins or ion channels move substances down their chemical Electrical gradients.
What are the 3 important characteristics of Carrier mediated transport displays?
Specificity
(each carrier is specialized to transport a specific substance)
Saturation
(Limit known as the transport Maximum)
Competition
( glycine and alanine ) Several closely related compounds may compete each other
Which of the following transport processes involved if transport of glucose from the intestine lumen into a small intestinal cell is inhibited by abolishing the usual Na+ gradient across the cell membrane???
Secondary active transport
Adenosine triphosphate(ATP) Is used indirectly for which of the following processes?
Absorption of glucose by intestinal cell
Define Osmolarity?
The concentration of osmotically active particles in a solution.
G* C
G= Number of particles in solution (osm/mol) C= concentration
The presence of solute in solution can produce an Osmotic pressure what is the formulas ??
n=g*c*rt N= osmotic Pressure G= Number of particles C= concentration Even gas constant T= temperature
Define osmosis?
Is the flow of water across a semipermeable membrane from a solution with low solute concentration to a solution with high concentration!,!
Assuming complete dissociation of all solutes, which of the following solutions would be hyperosmotic to 1mM NaCl?
1mM CaCl2
In error a patient is infused with large volumes of a solution that causes lysis of his red blood cells . The solution was most likely?
Hypotonic urea
