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

The frog heart is myogenic, meaning it generates its own electrical impulses independent of nervous system input. When removed from the body and kept moist in physiological saline, the excised heart continues beating autonomously for extended periods due to this intrinsic automaticity. Keeping it moist is essential for maintaining cellular function.

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