Question

Why are voluntary muscles called striated muscles?

Answer 1

Hint: Muscles are the soft tissues which are found in most animals. They contain protein filaments which include actin and myosin.

Complete answer:
Voluntary muscles are the muscles which are under conscious control and can be controlled at force or we can decide when to use them. They are also termed as skeletal muscles as they are seen attached to the bones. Voluntary muscles are the reasons for the movement of body parts and the locomotion. They are made with muscle fibers that are multinucleated cells with nuclei situated towards the edge of the cells. The muscle fiber has a cell membrane which is known as sarcolemma. The muscle fibers are set as one in a bundle to form the muscle. The power of voluntary muscles can be improved by exercising regularly.

Involuntary Muscles:
Involuntary muscles, they are also known as smooth muscles. They are the muscles in the human body that act without mindful control or cannot be controlled at our own desire. They are generally controlled by the autonomic nervous system in the body. As a result the involuntary muscles include all the muscles whose working is not affected by voluntary nerve activity.

The involuntary muscles are generally spindle-shaped and have a single centrally located nucleus. They are generally visceral and because of this they are mostly found in the walls of hollow organs such as the stomach, intestine, urinary bladder, uterus, etc. involuntary muscles are responsible for the movement of food in the alimentary canal and the contraction of the uterus during labor or childbirth and controlling the internal diameter of the blood vessels. Cardiac muscles also have involuntary muscles that they maintain the blood circulation all through the body by maintaining the heartbeat.

Voluntary muscles are also known as Striated muscles and are the skeletal muscles. The reason behind why they are called voluntary muscles is that their action is under the control of the somatic nervous system and their movement can be controlled by us not like as in the case of involuntary muscles. The muscle fibers of striated muscles or the voluntary muscles are multinucleated and cylindrical. These muscles are fond of the bones and tendons and are the important reasons for the movements of the skeleton. The striated muscles also comprise longitudinal and cross striations.

Note: Striated muscles are the highly organized tissue which will help to convert chemical energy to physical work. Their primary function is to generate and contact in order to help in the respiration, locomotion and pumping of blood.