Lab 7 past Qs Flashcards

1
Q

What substances taste salty?

A

(neutral salts of strong acids and bases)

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2
Q

What effect has verapamil?

A

Ca2+channel inhibitor

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3
Q

Effects of acetylcholine ismediated by which type of receptors?(

A

muscarine Ach receptors

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4
Q

Which effect has acetylcholine on gastric SM?()

A

stimulating

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5
Q

Which gastric juice producing cells are influenced by Acetycholine?(

A

Parietal Cells

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6
Q

What enzyme initiates SM contraction?

A

MLCK = Myosin Light Chain Kinase

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7
Q

What pathway does muscarinic Ach receptors activate?

A

G-protein phosphlipase C pathway

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8
Q

ED50?

A

Active ingredient concentration needed for half maximal muscle contraction

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9
Q

Examples of bitter taste?

A

several alkaloids: strychnine, quinine, several glycosides, ethers, some Mg2+and Ca2+salts, ammonium compound and sulphates

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10
Q

Examples of sour taste?

A

hydrogen ion dissociating molecules –buffers of saliva alters sensation

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11
Q

What dissociates the actomyosin complex?

A

myosin phosphatase (MP) enzyme

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12
Q

How to measure the basal HCl consentration?

A

by titratin 0.01 M NaOH, after adding phenophtalein

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13
Q

Where can you find the food eaten last?

A

in the cardia

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14
Q

Which cells does gastrin have effect on?

A

parietal cells

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15
Q

In which way does verapamil inhibit muscle contraction?

A

Ca2+channel inhibition

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16
Q

What substance act on pariental cells?

A

Acetylcholine, Histamine and Gastrin

17
Q

Where in gastrointestinal tract does ptyalin act?

A

in the stomach

18
Q

Mixture of stomach content is called?

A

Chymus

19
Q

The mixture of food structure resembles what?()

A

onion

20
Q

The taste pathway?

A

(fascial (VII), glossopharyngeal (IX) and vagus (X) are involved