Question

1] voluntary and involuntary
Actions

2] Medullated and non-Medullated nerve fibre ​

Answer 1

Answer:

1) voluntary actions are the actions that are performed by our own free will  

     like talking,etc.

   involuntary actions are actions which we cannot control like beating of    

     our heart,etc

2) the nerve cell which is having a layer of myelin sheath is called medulated.

    the nerve cell which is not having the layer of myelin sheath is non medulated.

Answer 2

Explanation:Voluntary action - Actions which are controlled by "the Cerebrum (Fore brain)" are called voluntary actions. Theses actions are slow actions which can regulate by muscles of the body. ... Involuntary action - Actions that are controlled by "the Hind brain and the Spinal cord" are called Involuntary actions.Medullated nerve fibre is a nerve fibre with a medullary sheath. Non-medullated nerve fibre is a nerve fibre without medullary sheath. Medullated nerve fibre is also referred to as myelinated nerve fibre. Non-medullated nerve fibre is also referred to non-myelinated nerve fibre.

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