One of the differences between involuntary and voluntary muscles is how each muscle moves. An involuntary muscle is one that can't be controlled. A voluntary muscle, however, is one that can be controlled through stimuli, such as movement.Know More
Involuntary and voluntary muscles also appear differently when viewed under a microscope. Involuntary muscle, called smooth muscle, is located within blood vessels, digestive system and internal organs, with the exception of the heart. It looks smooth when viewed under a microscope and doesn't have the striations or stripes that are seen in voluntary muscle tissue.
Voluntary muscles are also called skeletal muscles. These are the muscles attached to the bones, and movement is caused through contraction of these muscles. Every movement a body makes is due to voluntary muscles contracting and relaxing. There are several proteins contained in voluntary muscles that help the muscles to contract and relax, but the two primary proteins are myosin and actin. These muscles contain more than one nucleus and, depending upon the part of the body, can be up to 30 centimeters in length.
A third type of muscle, called cardiac muscle, is found within the body. This muscle is only found within the heart. It is a type of involuntary muscle, meaning it is one that can't be controlled.Learn More
Fast twitch and slow twitch muscles are types of muscle fiber used to perform different kinds of physical activity. For example, slow twitch muscles in the lower leg aid in standing, while fast twitch muscles in the eyelid enable blinking.Full Answer >
The onset of soft muscles can be a symptom of many possible diseases, as explained on Right Diagnosis from Healthgrades. It can also be an indicator of a more immediate problem, such as muscle overuse, an electrolyte imbalance, a spinal injury or dehydration. Soft and weak muscles are sometimes combined with a wide variety of other symptoms including respiratory, nerve, pain, sensory, skin and movement problems.Full Answer >
Muscles contract through a series of steps that begin with an action potential. The action potential in a neuron travels down the axon of the neuron and reaches the synapse. At the synapse, the action potential releases a neurotransmitter that stimulates a motor neuron of a muscle cell to contract.Full Answer >
Muscles rely on oxygen for energy, according to Men's Health. The energy oxygen provides is necessary for muscles to contract efficiently during work. With inefficient contracting, muscles are not as effective at performing physical work.Full Answer >