Which of the following obeys the all-or-none law?
A)The whole muscle
B)A muscle fiber
C)The whole muscle and a muscle fiber

Question

Quizplus · Accepted Answer

The all-or-none law states that a muscle fiber either contracts fully or not at all, regardless of the intensity of the stimulus. Therefore, a single muscle fiber obey the all-or-none law, but a whole muscle consists of many muscle fibers that may not all contract at the same time, so it does not obey the all-or-none law.

Which of the Following Obeys the All-Or-None Law