BRS PHYSIOLOGY- CELL PHYSIOLOGY EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
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Module
BRS PHYSIOLOGY
Institution
BRS PHYSIOLOGY
BRS PHYSIOLOGY- CELL PHYSIOLOGY EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
What are the backbone and tails made of in the phospholipid bilayer?
Backbone-Glycerol
Tail- Fatty acids
What interactions hold integral proteins to the cell membrane?
Hydrophobic reactions
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2) saturation: transport rate increases with concentration until saturated.
3) competition: structurally related solutes can compete
concentration when carrier is saturated
Transport maximum:
Which is more rapid, facilitated diffusion or simple diffusion?
facilitated
Which direction does the Na/K ATPase pump ions?
Pumps Na out of the cell, and K into the cell.
How many Na is pumped to each K?
3Na+/2K+
What drugs inhibit the Na/K ATPase?
ouabain
digitalis
Where and how does the Ca-ATPase work?
In sarcoplasmic reticulum, transports Ca against electrochemical gradient.
, Where and how does the H/K ATPase work?
Gastric parietal cells, transports H into the lumen of the stomach against gradient.
What drug inhibits the H/K ATPase?
omeprazole
concentration of osmotically active particles in a solution
osmolarity
osmolarity equation
=g x C
g-# of particles in solution
osmotic pressure equation
=g x C x RT
0-1, describe the ease with which solute permeates a membrane.
reflection coefficient
impermeable, creates osmotic pressure (albumin)
reflection coefficient of 1
completely permeable, will not exert osmotic effect (urea)
reflection coefficient of 0
How do you calculate the effective osmotic pressure?
Osmotic pressure multiplied by the reflection coefficient.
How are some ion channels selective?
-The charge that lines the channel
-The size of the channel
What determines the conductance of a channel?
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