The Muscular System Chapter Test Review

Voluntary muscle tissue is

• skeletal muscle

• cardiac muscle

• smooth muscle

• dense irregular

• dense regular

Endomysium covers

• an individual muscle cell

• an entire muscle

• myrofibrils

• fascicles of muscle cells

• smooth muscle only

The type of msucle tissue picture in Figure 6.3 is

• skeletal muscle

• voluntary

• found only in the heart

• smooth muscle

• striated

Smooth muscle cells are

• involuntary

• multinucleate

• striated

• branched

• cylindrical

Which type of muscle tissue repsonds the fastest to stimulations to contract?

• tendons

• skeletal

• cardiac

• visceral

• smooth

Which of the following is NOT a function of the muscular system?

• maintenance of postur

• stabilization of joints

• generation of heat

• hematopoiesis

• production of movement

Which one of the followign is composed of myosin protein?

• thick filaments

• light bands

• thin filaments

• Z discs

• all myofilaments

Place these structures of the skeletal muscle in order from largest to smallest:

1) fascicle

2) mytofilament

3) muscle fiber (cell)

4) myofibril

5) sarcomere

• 2, 5, 4, 3, 1

• 3, 1, 2, 4, 5

• 3, 2, 4, 4, 1

• 1, 4, 3, 2, 5

• 1, 3, 4, 5, 2

The light and ark banding patterns found in striated muscle, like skeletal muscle, originate from

• layers of thick and thin filaments

• organization of M lines, H zones, and Z discs

• repetitive Z discs

• presence of H zones and Z discs

• alternating light and dark bands

Why are calcium ions necessary for skeletal muscle contraction?

• calcium causes ATP binding to actin

• calcium triggers the binding of myosin to actin

• calcium releases the inhibition on Z discs

• calcium increases the action potential transmitted along the sarcolemma

• calcium binds to regulatory proteins on the myosin filaments, changing both their shape and their position on the thick filaments