Ch 9 Muscular System Flashcards
List the types of muscle tissue.
Cardiac
Smooth
Skeletal
Skeletal muscle tissue is involuntary or voluntary?
Voluntary
Another name for a single skeletal muscle cell is a skeletal muscle_________.
Fiber
Which muscle tissue type is the most abundant?
Skeletal
The sarcolemma is
A. Cytoplasm
B. Smooth ER
C. A cell membrane
• a cell membrane
Voluntary movements such as raising your hand are produced by the contraction of what type of muscle cells?
Skeletal
The ability of muscle to shorten forcefully is called
Contractability / contract
_______ is a threadlike structure, approximately 1-3 micrometers in diameter, that extends from one end of the muscle fiber to the other
myofibril
When examined in a longitudinal section, skeletal muscle has alternating light and dark bands producing a(n)______ appearance
Striated
The darker-staining band in the center of each sacromere is called a ______
Band
Each A Band contains both actin and ______ filaments overlapping except in ________ of the A band
Myosin ; the center
_______are tube-like invaginations of the sarcolemma that extend inward throughout the muscle cell
transverse (T) tubules
Myosin heads bind to ______
globular actin
The sarcomere is called the basic functional unit of a muscle fiber because it is the smallest part of the fiber that is capable of _______\
Contracting
Which is the thinnest myofilament?
Actin
