Chapter 10 Muscle Tissue

Front 1

Functions of Skeletal muscles

Back 1

1. Produces skeletal movement
2. Maintains posture and body movement
3. Support soft tissue
4. Guard entrances and exits
5. Maintain body temperature
6. Store nutrient reserves

Front 2

Three layers of Connective Tissue

Back 2

1. Epiimysium
2. Perimysium
3. Endomysium

Front 3

Epimysium

Back 3

an exterior collagen layer connected to the deep fascia which separates the muscle from surrounding tissues.

Front 4

Perimysium

Back 4

surrounds bundles of muscles fibers called fascicles. Perimysium holds the blood vessels and nerves that supply the fascicles.

Front 5

Endomysium

Back 5

surrounds individual muscle cells (the muscle fibers), and contains the capillaries and nerve fibers that directly contact the muscle cells. Endomysium also contains satellite cells (stem cells) that repair damaged muscles.

Front 6

what happens when all the collagen fibers of the epimysium, perimysium and endomysium come together?

Back 6

At each end of the muscle, the endomysium, perimysium and epimysium come together to form a connective tissue attachment to the bone matrix, either a tendon (a bundle) or an aponeurosis (a sheet).

Front 7

How the connective tissues supply blood vessels and nerves to muscle fibers?

Back 7

Within the endomysium, arerioles supply blood to a capilary network that services the individual muscle fiber.

Front 8

how do skeletal muscles fibers look like?

Back 8

They are enourmous and very long in length. They are multinucleated. The genes control the production of enzymes and structural proteins required for normal muscle contraction.

Front 9

Myoblasts

Back 9

Groups of embryonic cells fuse or forming individual multinucleate skeletal muscle fibers. Some myoblasts do not fuse with developing muscle fibers.

Front 10

What do unfused myoblasts do?

Back 10

Unfused myoblasts remain in the adult skeletal muscle tissue as myosatellite cells. They assist in the repair of the tissue.

Front 11

Sarcolemma

Back 11

Its a plasma membrane of a muscle fiber, it has a characteristic transmembrane potential due to the unequal distribution of positive and negative charges across the membrane.