Question

Frog' heart when taken out of the body contiaues to *** for sometime. Select the best option from the following statements.

I. Frog is a poikilotherm.

II. Frog does not have any coronary circulation.

III. Heart is myogenic in nature.

IV. Heart is autoexcitable.

(a) Only III

(b) Only IV

(c) I and II

(d) III and IV

Answer 1

Correct option (d) III and IV

Explanation

Frog heart is myogenic and autoexcitable. In this conditions, contraction of the heart originates within the muscles itself. when muscles are contracting. They are releasing heat, which keeps the electrochemical reactions in muscles going so the muscles of heart keep contracting after the removal of heart from the body.