saliva analysis

If you put a small amount of salt in your mouth...

• there will be chemical and mechanical stimulation

• more saliva will be produced

• All are correct

• the parasympathetic SN is activated

In a dangerous situation, what hormone is released?

adding acetic acid to saliva...

• mucin precipitates

• turns purple

• amylase precipitates

• all false

If saliva boils…

• works normally

• its activity temporarily decreases

• increases its activity because it is at the optimal temperature

• It denatures, losing its structure and function

What happens if adding saliva to lugol it turns purple?

• amylase has hybridized the starch

• the starch has not been hydrolyzed by amylase

• there is no presence of starch in the sample

Benedict's reaction detects...

• the presence of oxidizing sugars

• sugars that reduce Cu+ to Cu2+

• sugars that reduce Cu2+ to Cu+

• sugars that oxidize Cu2+ to Cu+

When does amylase reach its maximum activity, with respect to pH?

• when we add H2O, because pH=7

• when we add NaHCO3, because pH=6.5

• when we add HCl, because pH=6.5

Why does amylase stop working in the stomach?

• because the stomach secretes HCl

• because in the stomach there is an acidic pH

• all true

mucin provides viscosity to saliva

• True

• False