Lab 7 past Qs Flashcards
What substances taste salty?
(neutral salts of strong acids and bases)
What effect has verapamil?
Ca2+channel inhibitor
Effects of acetylcholine ismediated by which type of receptors?(
muscarine Ach receptors
Which effect has acetylcholine on gastric SM?()
stimulating
Which gastric juice producing cells are influenced by Acetycholine?(
Parietal Cells
What enzyme initiates SM contraction?
MLCK = Myosin Light Chain Kinase
What pathway does muscarinic Ach receptors activate?
G-protein phosphlipase C pathway
ED50?
Active ingredient concentration needed for half maximal muscle contraction
Examples of bitter taste?
several alkaloids: strychnine, quinine, several glycosides, ethers, some Mg2+and Ca2+salts, ammonium compound and sulphates
Examples of sour taste?
hydrogen ion dissociating molecules –buffers of saliva alters sensation
What dissociates the actomyosin complex?
myosin phosphatase (MP) enzyme
How to measure the basal HCl consentration?
by titratin 0.01 M NaOH, after adding phenophtalein
Where can you find the food eaten last?
in the cardia
Which cells does gastrin have effect on?
parietal cells
In which way does verapamil inhibit muscle contraction?
Ca2+channel inhibition