Question

. 39. Perfusion of heart of frog with acetylcholine a) Increases rate of heartbeat and increaes amplitude b) Decreases rate of heartbeat and increase amplitude c) Decreases rate of heartbeat and decrease amplitude d) Increases rate of heartbeat and decrease amplitude​

Answer 1

Answer:

High doses of acetylcholine produce positive inotropic and positive chronotropic ac' on the atropinised frog heart (7,9). We have however, now observed that during the wi months (January to March) acetylcholine either produces no action or only positive inotr action on the perfused atropinised frog heart.

Answer 2

Explanation:

Perfusion of heart of frog with acetylcholine a) Increases rate of heartbeat and increaes amplitude b) Decreases rate of heartbeat and increase amplitude c) Decreases rate of heartbeat and decrease amplitude d) Increases rate of heartbeat and decrease amplitude

→c) Decreases rate of heartbeat and decrease amplitude