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

If the heart is cut out from the body of a frog, it will continue beating for a long time if it is kept moist. The poikilotherm heart has a built-in pacemaker (a group of neural cells sending out regular impulses) allowing the heart to beat for hours even after the brain is no longer connected to the heart.

Keep practicing — related questions