Multiple choice

If the heart is cut out from the body of a frog

  1. it will continue beating for a long time if it is kept moist

  2. it will continue beating for a long time if it is kept dry

  3. it will not beat at all

  4. none of the above

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Frog hearts have myogenic properties, meaning they can generate their own electrical impulses without external nerve stimulation. When kept moist, the cardiac muscles continue to contract rhythmically for extended periods even after removal from the body. Option A correctly states this phenomenon. Option B is incorrect because dry conditions cause tissue damage. Option C is false as the heart will beat autonomously. This is a classic demonstration of cardiac muscle automaticity.

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