Bioassay of drug

Question

A response of complete arrest

induced by a Cardiac glycoside to

Heart of Pigeon is noted _-------as

response

Select one:

a. Antagonism

b. Quantal

c. Dilatory

d. Graded

Answer 1

When a response of complete arrest is induced by a cardiac glycoside in the heart of a pigeon, it's referred to as a "Quantal" response.

A quantal response is one that occurs in an "all-or-none" fashion, meaning it either happens completely or not at all. In this case, the complete arrest of the heart's activity induced by the cardiac glycoside fits this description, making it a quantal response.