chapter 9 skeletal muscle tissue
The region of the sarcomere containing the thick and thin filaments is the
A Band
Muscle tissue, one of the four basic tissue groups, consists chiefly of cells that are highly specialized for
Contraction
Skeletal muscle fibers are formed from embryonic cells called
Myoblasts
At each end of the muscle, the collagen fibers of the epimysium, and each perimysium and endomysium, come together to form a
Tendon
The bundle of collagen fibers at the end of a skeletal muscle that attaches the muscle to bone is called a(n)
Tendon
The delicate connective tissue that surrounds the skeletal muscle fibers and ties adjacent muscle fibers together is the
Endomysium
Nerves and blood vessels that service the muscle fibers are located in the connective tissues of the
Perymysium
The plasma membrane of skeletal muscle is called the
Sacrolemma
The advantage of having many nuclei in a skeletal muscle fiber is the ability to
The ability to produce large amounts of the enzymes and structural proteins needed for contraction.
The repeating contractile unit of a skeletal muscle fiber is the
sacromere
Individual muscle cells are surrounded by what connective tissue?
endomysium
Muscle fibers differ from "typical cells" in that muscle fibers
have many nuclei
The area in the center of the A band that contains no thin filaments is the
H band
The region of the sarcomere that always contains only thin filaments is the
I Band
Each skeletal muscle fiber contains ________ myofibrils.
hundreds to thousands
The skeletal muscle complex known as the triad consists of
B) a transverse tubule and two terminal cisternae.
2) Which of the following statements is incorrect? A) The contractions of skeletal muscles pull on tendons and move bones of the skeleton. B) Skeletal muscles store nutrient reserves. C) Skeletal muscles are responsible for the pumping action of the heart. D) Skeletal muscles support the weight of some internal organs. E) Skeletal muscle contractions help maintain body temperature.
C) Skeletal muscles are responsible for the pumping action of the heart.
1) Which of the following is a recognized function of skeletal muscle? A) produce movement B) maintain posture C) maintain body temperature D) guard body entrances and exits E) All of the answers are correct.
E) All of the answers are correct.
The dense layer of connective tissue that surrounds an entire skeletal muscle is the
Epimysium
________ are stem cells located between the endomysium and sarcolemma that function in the repair of damaged muscle tissue.
Myosatellite cells
Which of the following best describes the sarcoplasmic reticulum?
storage and release site for calcium ions