MUSCLE
SKELETAL MUSCLE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
True or False:Muscle fiber contraction is “all of none".
|
|
True
|
|
|
False
|
|
|
Either A or B
|
|
|
None of the above
|
Explanation:
Detailed explanation-1: -Individual muscle fibers contract in an all or nothing phenomenon, but whole can contract in a graded phenomenon. This is achieved by altering the number of motor units activated in the whole muscle.
Detailed explanation-2: -Muscles do not contract in an all-or-nothing way. All of the fibers do not have to contract at the same time, meaning that a muscle can generate a precisely gradated amount of force, coordinated by the dialogue between the nervous system and the muscles.
Detailed explanation-3: -Muscle fibres are said to be contractile in nature.
There is 1 question to complete.