Fill in the Blanks with Correct Structure of Skeletal Muscle Flashcards

Typically, both ends of skeletal muscleare connected to bone. Muscles areconnected to bone through___Exceptions include the skeletal musclesthat are attached to facial skin.

Skeletal muscle contains many ____, whichare supported by layers of connective tissue.As you probably expect, skeletal muscle alsocontains blood vessels and nerves.

The fascicles contain many muscle cells called ___

____often run the length of themuscle tissue. Note, this is much longer thanmost cells. Each muscle fiber contains manynuclei and mitochondria.

The plasma membrane is called the ___

In specific regions, the sarcolemma foldsinward and tunnels deep into the interior ofthe fiber forming___

The cytoplasm of the muscle fiber is called the___

How does the anatomy of the muscle fiberrelate to its function? For example, the sarcolemma of the musclefiber propagates ___ as occurs inneurons.

Under the microscope, skeletal muscle (andcardiac muscle) appear striped or striated. This striated appearance is due to the orderlyarrangement of ____ inside the myofibrils.

Myofibrils are composed of many repeatingunits called _____

Each sarcomere is bordered by the ___ Inthe middle of each sarcomere is the M line.

Under a microscope, a sarcomere has distinctlight and dark regions.1. The ___ is the darkest region2. The __ is a lighter region in the centerof the A band3. The ___ is the brightest region

The contractile elements of the muscle fiberare the myofilaments.

Thin filaments are called ___ which areattached at the Z line.

Thick filaments are called ___ which areattached at the M line.