Question:

All or none law is not applicable for

Updated On: Aug 8, 2023

whole skeletal muscle
single skeletal muscle fibre
whole cardiac muscle
single smooth muscle fibre

Hide Solution

Verified By Collegedunia

The Correct Option is A

Approach Solution - 1

All or none law or Bowditchs law is a principle which states that response of a muscle nerve to a stimulus is not proportionate to the intensity of stimulus but is either present in full strength or completely absent. This law is applicable to single muscle fibre but entire muscle does not follow this law.

Was this answer helpful?

Hide Solution

Verified By Collegedunia

Approach Solution -2

Ans: All and none law is the functioning of the muscle fibres and how they respond to stimuli. According to this law, a muscle fibre will contract fully in response to a stimulus or it will not contract at all. This means that if the muscle a=has received a stimulus and reached its threshold then it will contract fully even though another stimulus occurs. But in the case of the whole skeletal muscle, the all and none law is not applicable at macroscopic level. The reason is that there are multiple muscles that are involved in the contraction and all the muscles have different threshold potential.Thus, the overall force of contraction of a whole muscle can vary.

Was this answer helpful?

Learn with videos:

All and none law

Questions Asked in WBJEE exam

View More Questions

Concepts Used:

Locomotion and Movement

Locomotion

The movement of a creature from one place to another is known as locomotion. During the process, there is the action of appendages such as wings, limbs, and flagella. In some animals, like fish, whales, and sharks, locomotion upshots from a wave-like series of muscle contractions. Locomotion helps an organism in finding their food, avoid harsh weather conditions, escape from their predators, etc.

Some examples of locomotion are walking, running, swimming, etc. Movement, on the other hand, refers to any type of motion that need not be localized.

Read More: Locomotion and Movement

Movement

Movement is generally described as a state of changing the position from rest to motion or vice-versa. Movement can be both voluntary movement and involuntary movement. Movement helps an organism perform essential functions, such as pumping blood to the different parts of the body, etc.