Anatomy Ch 7 Muscle Quiz

The three layers of connective tissues comprising each muscle are

• cardiac, smooth, and skeletal.

• epimysium, perimysium, and endomysium .

• sarcolemma, sarcomeres, and T tubules.

• A band, I band, Z lines.

The dense layer of collagen fibers that surrounds an entire skeletal muscle is the

• epimysium.

• tendon.

• perimysium.

• fascicle.

Fascicles are bundles of muscle fibers that are surrounded by

• epimysium.

• endomysium.

• myofibrils.

• perimysium.

Tendons are bundles of collagen fibers at the end of a skeletal muscle that

• attach muscle to muscle.

• connect different skeletal muscles.

• allow blood vessels andd verves to innervate muscle tissue.

• attach muscle to bone.

What is labeled as I in this picture?

• Muscle fiber

• Myofibril

• Fascicle

• Myosin

What is labeled as E in this picture?

• Muscle fiber

• Myofibril

• Fascicle

• Myosin

The thick filaments of a sarcomere consist of

• actin.

• myosin.

• troponin.

• muscle fibers.

The filaments that are covering the attachment sites on actin are

• tropomyosin.

• myosin.

• troponin.

• tropomyosin.

Active sites on the actin become available for binding when

• actin binds to troponin.

• myosin binds to troponin.

• calcium binds to troponin.

• troponin binds to tropomyosin.

The neurotransmitter released from the synaptic vesicles that initiates an action potential in the sarcolemma is

• troponin.

• calcium ions.

• acetylcholine.

• actin.