1) Which statement regarding skeletal muscle is true?

A) Skeletal muscles are directly, but not indirectly, attached to bones.

B) Skeletal muscles do not contain connective tissue.

C) Skeletal muscles do not maintain body temperature.

D) Skeletal muscles do not contain nervous tissue.

E) Skeletal muscles contain blood vessels.

2) Which of the following statements describes how muscles help maintain homeostasis?

A) The contractions of skeletal muscles pull on tendons and move elements of the skeleton.

B) Skeletal muscles are responsible for guarding the openings of the digestive and urinary tracts.

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.

3) A layer of collagen fibers that surrounds an entire muscle is called

A) endomysium.

B) perimysium.

C) sarcolemma.

D) sarcomere.

E) epimysium.

4) A sheath of connective tissue surrounding a bundle of striated muscle fibers is called ________.

A) endomysium

B) perimysium

C) sarcolemma

D) epimysium

E) sarcoplasmic reticulum

5) Muscle fascicles are separated by

A) endomysium.

B) perimysium.

C) epimysium.

D) sarcolemma.

E) periosteum.

6) Regarding a skeletal muscle fiber, wherever a T-tubule encircles a myofibril, the tubule is tightly bound to

A) the nucleus.

B) the sarcolemma.

C) the endomysium.

D) the sarcoplasmic reticulum.

E) thick filaments.

7) Each myofibril consists of approximately ________ sarcomeres.

A) 10

B) 500

C) 10,000

D) 100,000

E) 2-3 million

8) A muscle ________ contains a sarcolemma, sarcoplasm, myofilaments, and myofibrils.

A) fiber

B) intercalated disc

C) T-tubule

D) myofibril

E) motor end plate

9) The area between Z lines is the

A) sarcolemma.

B) sarcomere.

C) sarcoplasmic reticulum.

D) myofibril.

E) myofilament.

10) Which of the following sarcomere components is made up of proteins that connect the central portions of each thick filament to its neighbors?

A) Z line

B) M line

C) H band

D) A band

E) I band