Unit 2D Worksheet
1) Skeletal Muscle is_____________, multinucleated, _____________ and under _________
control. The skeletal muscle cell can also be referred to as muscle________ or____________.
Its function is to ______________bones and stabilize body ________________and
skeletal__________.
2) Cardiac Muscle is also striated, but is_______________, branched, and under
___________ control which can also be referred to as_____________________. Its
function is to _________the blood and ______________volume.
3) Smooth muscle which can be found in blood vessels, ____________& intestines, is
_______________, involuntary and _________________and under the control of the
_______________ system.
4) The functions of muscles are__________, which in skeletal muscles ________bone, in
cardiac muscle __________blood, and in smooth muscle is the _________and _________
movements through hollow structures. The affects movements are __________changes in
smooth muscle such as vasodilation, which is the ____________of a vessel and/or
vasoconstriction, which is the ______________ of a vessel these adjust the _________flow
through a structure. An example of effects movement might be muscle _____________or
peristalsis. Other functions are _____________body position and __________in _________
muscle and regulation of ______________in cardiac and ______________muscle and lastly
____________________in which muscles produce __________as a by-product of
muscle________________.
5) Characteristics of muscles are:____________________, ____________________,
_________________ and__________________.
6) Each muscle is stimulated by a____________, each muscle __________is stimulated by a
synaptic end _______or _______or motor_______ __________ (which is the same thing) at
the neuromuscular_________________.
7) Each muscle cell or _________is surrounded by a __________bed which allows both
_______________and _________________ of the muscle.
8) Myoglobin which has red pigmentation stores __________for aerobic _______________
_____________________.
9) The components of connective tissue of the muscle are the __________which are
_____________of connective tissue beneath the skin and around the ____________which is
a pathway for _____________and ___________vessels. The next layer is the
______________fascia which is ____________and loose areolar connective tissue, which
stores ________and provides ____________and protection. The last layer is the
__________ fascia which is dense _____________connective tissue which lines body
_________ and ______________and also separates________________.
10) Beneath the fascia is the_____________, which wraps the entire___________, the
_______________which covers the _____________which are bundles of ___________or
muscle cells, and________________, which penetrates each ______________and
________________the fibers.
11) All 3 of these tissues, the______________, the _____________and the ____________
may extend beyond muscle to from a_____________, which attach muscle to _________
which would be the___________ of that bone, or other muscle tendons.
12) The _____________ _____________ (SR) contain terminal cisternae which _________
and releases ____________ to the sarcoplasm to cause a_____________.
13) Cylindrical structures in ______________consist of thick and thin________________,
which don’t go the entire length of the________________, they separate into units called
______________which are the ________________units of skeletal muscle.
14) ____ discs are plates of ___________which form separations between ______________
and anchor _______ filaments, they are found in ___ bands which are isotropic, which means it
________ size. ___ bands run from sarcomere to ________________and are composed of
only ______ filaments.
15) ___ bands are anisotropic which means it does ______ change size, and is composed of
___________filaments and its border look dark, due to the ___________of the thick and
________filament. The ______ zone is composed of _________ filaments. The M line is the
connection point of ___________ filaments using the protein_________.
16) Thin filaments are mostly _________ and also include the regulatory proteins __________
and_____________, where thick filaments are mostly ________and has bulbous __________
that form the cross bridges with for contraction.
17) Motor units consist of a _________ ____________and all the _____________ (muscle
fibers) that _____________ or innervates it.
18) The fact that muscles are never totally ___________and that there are always some
_________ _________contracted is referred to as__________ ___________.
19) When a _____________ operates at a mechanical _________________, the
_________________ (or load) is closer to the ________________.
20) __________________ class levers are rare/common, and can be found in the joints
forming the _____________ of the foot when standing ________________.
Courtesy: mbmadsen