one more - nitya

[ArchivalUser]

Which of the following explains why the digestive action of salivary amylase continues for some time after swallowing?
a. Gastric HCI increases the digestive action of amylase
b. Gastric mucin lubricates the bolus and assists amylase activity
c. The amylase inside the bolus is protected from the inactivating action of gastric HCI.
d. Water absorption by the stomach concentrates amylase and make its action more effective

[ArchivalUser]

An analysis of an EKG shows P-waves occuring in the ST segment. This would indicate ectopic beats originating in the
a. Atria.
b. A-V node.
c. Lower portion of the Bundle of His.
d. Upper portion of the bundle of His.

[ArchivalUser]

cc

[ArchivalUser]

c,?

[ArchivalUser]

for 1.c is correct
2.i thought it was atria

[ArchivalUser]

i dont know abt second one