M. Koeppen, MD, PhD and Bruce A. Stanton, PhD
9780323393942 Chapter 1-44 Complete Guide .
Skeletal muscle - ANSWER: Voluntary act on the skeleton, maintenance of posture, locomotion,
speech and respiration
Cardiac muscle - ANSWER: Controlled by the ANS, striated, involuntary
Smooth muscle - ANSWER: Involuntary
Origin - ANSWER: Point of attachment closest to the spine
Insertion - ANSWER: Point of attachment on the far side of the joint
Tendons - ANSWER: Connective tissue at the end of the muscle
Flexor - ANSWER: Curled
Extensor - ANSWER: Extended
Muscle fibers - ANSWER: Composed of numerous cells
Endomysium - ANSWER: Connective tissue layer surrounding each of these fibers
Fascicles - ANSWER: Individual muscle fibers grouped together
Perimysium - ANSWER: Connective tissue layer surrounding the fascicles
Epimysium - ANSWER: Connective tissue sheath that surrounds the muscle
Myotendinous junction - ANSWER: Transmission of the force of contraction of the muscle to the
tendon to effect movement of the skeleton
Myofibrils - ANSWER: Bundles of filaments
Sarcomeres - ANSWER: Myofibrils subdivided longitudinally
Z lines - ANSWER: Represents a repeating contractile unit in skeletal muscle
I band - ANSWER: Contains thin filaments composed of actin
A band - ANSWER: Thick filaments composed primarily of myosin
H band - ANSWER: Light area in the center of the sarcomere that contains myosin thick filaments and
no thin actin filaments
M line - ANSWER: Dark line that includes proteins critical for organization and alignment of the thick
filaments in the sarcomere
Sarcoplasmic reticulum - ANSWER: Intracellular membrane that regulates intracellular [Ca++]
T tubules - ANSWER: Invaginations of the sarcolemma that is in contact with the extracellular space