Master Fitness( Muscle Physiology) Guaranteed A+
definition ️️Muscle physiology is the study of muscle function.
3 major muscle types ️️Cardiac, skeletal, and smooth
cardiac muscle ️️Cardiac muscle is self-stimulating, in that it works without conscious thought.
Cardiac muscle s...
definition ✔️✔️Muscle physiology is the study of muscle function.
3 major muscle types ✔️✔️Cardiac, skeletal, and smooth
cardiac muscle ✔️✔️Cardiac muscle is self-stimulating, in that it works without conscious thought.
Cardiac muscle surrounds the heart, contracting with every beat. It has properties of skeletal muscle in
that it will improve in size, thickness and strength with training. The stronger the heart muscle, the more
blood containing oxygen and nutrients may be sent to the body for energy. We will discuss the structure
and function of the heart during the period of instruction on the Oxygen Transport System or OTS.
Skeletal muscle ✔️✔️Skeletal muscle is voluntary in that we can control the stimulation to contract
this type of muscle. Skeletal muscles attach to bones and provide movement and stability. Most of our
discussion about the muscular system in this course will pertain to training skeletal muscle for improved
physical performance.
Smooth muscle ✔️✔️Smooth muscle is involuntary in its ability to stimulate itself to contract. Smooth
muscle is found in the lining of the intestines and the vascular system. Smooth muscle works on its own,
without conscious thought. You don't have to think about digestion or blood flow to make it happen.
Smooth muscle contracts, providing movement of food through the intestines and blood vessel
expansion and constriction.
Muscle structure ✔️✔️Tendons attach whole skeletal muscles to bones. Whole skeletal muscles
consists of bundles of fasciculi (bundles of fibers). Each fiber (muscle cell) contains many sarcomeres. A
sarcomere is the smallest functional unit of muscle consisting of the myofiliments: actin, myosin and
troponin.
Connective tissue covers the outside of the entire muscle (epimysium), bundles of muscle (perimysium)
and myofibrils or fasciculi (endomysium) that bundle the individual fibers.
All the structures and chemicals necessary for a muscle to contract are present in each sarcomere.
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