Download Study Questions Skeletal Muscle Tissue

Study Questions Skeletal Muscle Tissue
1. What is the main function of skeletal muscles?
Movement
2. List the three types of contractile cells of the body.
Smooth muscle cells, Cardiac muscle cells, Skeletal muscle cells
3. Match the following types of contractile cells to their shape (branching,
elongated, spindle-shaped):
_____elongated______________ a. Skeletal muscle cells
_____branching______________ b. Cardiac muscle cells
_______spindle-shaped_______ c. Smooth muscle cells
4. Match the following types of contractile cells to the characteristics of their
nuclei and presence or absence of striations:
Cardiac Muscle Cells Smooth Muscle Cells
Skeletal Muscle Cells
____Cardiac muscle_______________ a. presence of visible striations &
single, centrally-located nuclei
___skeletal muscle________________ b. presence of visible striations &
multiple peripheral nuclei
_____smooth muscle_________ c. absence of visible striations & single,
centrally-located nuclei number of nuclei
5. What is the name of the structure that attaches skeletal muscles to bones?
tendon
6. Bundles of skeletal muscle cells are called __fascicles______________.
7. The connective tissue which immediately surrounds a muscle is called
___epimysium____________ and the connective tissue around the fascicles is
called _____perimysium___________.
8. What is the function of endomysium? wraps individual cell fibers
9. Match these terms to their description:
Triad
T tubules
Terminal cisternae
Sarcolemma
Muscle fibers
Mitochondria
Sarcoplasmic reticulum
Myofibril
_terminal cisterna_ a. Sac-like regions of the sarcoplasmic reticulum
that contain calcium ions.
_____mitochondria_____ b. Sites of ATP synthesis.
__sarcolemma_____
Muscle fiber________
c. Plasma membrane of the muscle cell.
d. Alternative name for skeletal muscle cells.
Sarcoplasmic reticulum e. Interconnecting tubules of endoplasmic
reticulum that surround each myofibril.
____Triad_________
f. A group of one T tubule lying between two
adjacent terminal cisternae.
___T-tubules__________ g. Invaginations of the
projecting deep into the cell.
__Myofibril_______
sarcolemma
that
h. Contains the contractile filaments within the
skeletal muscle cell.
10. What are the names for the two types of filament in a myofibril?
Actin and Myosin
11. What creates the skeletal muscle cell's striated appearance?
The arrangement of thick (myosin ) and thin (actin) filaments form light and dark
bands. Myosin dark band actin light band
12. Match the following:
A band
I band
H zone
_____I band_________ a. Contains only thin filaments.
_____A band_________ b. Contains only thick filaments.
______H zone________ c. Contains both thin and thick filaments.
13. Perpendicular to the myofilaments are the Z lines and the M lines. The Z
lines connect the ____thin_________ filaments and the M lines connect the
____thick _________ filaments.
14. The region of the myofibril between two Z lines that is the contractile unit
of a muscle cell is called a __Sarcomere___________ .
15. Arrange the following from smallest structure to largest structure:
Muscle cell or muscle fiber 3
Fascicle 4
Myofilaments 1
Whole skeletal muscle 5
Myofibril 2