lecture 6 Flashcards
What characteristics describe both skeletal and cardiac muscle?
striations
The outermost layer of connective tissue surrounding a skeletal muscle is the
epimysium
Contraction of myofibrils within a muscle fiber begins when
calcium is released from the sarcoplasmic reticulum
Skeletal muscle contraction is triggered to begin when calcium is released from
terminal cisterns of sarcoplasmic reticulum
Which region of a sarcomere contain thin filaments?
both the I and A band
Which functions as a motor protein in all three types of muscle tissue?
myosin
name a something that is not a function of skeletal muscle tissue?
moving food through the small intestine
Skeletal muscle is covered, surrounded and protected by various layers of connective tissue. Which layer of connective tissue would surround a bundle of muscle fibers (muscle cells)?
perimysium
What structure occurs at the border between two adjacent sarcomeres?
Z band
The sheet or broad band of fibrous connective tissue that supports and surrounds muscles and other organs of the body is called
fascia
Autonomic motor neurons regulate
both smooth and cardiac muscle
Which muscle fiber type usually has the lowest threshold for activation and thus is recruited first?
slow-oxidative muscle fibres
Which type of muscle tissue would have these characteristics: branched cells, usually has one nucleus, has striations (a striped appearance)?
cardiac
which type of muscle tissue is under the voluntary control of our nervous sytem. We can consciously control the movement of this type of muscle tissue.
skeletal
Which type of muscle tissue is found in the walls of hollow organs and is not under voluntary control.
smooth
