What are the three types of muscle? correct answers Smooth Muscle, Cardiac Muscle, and
Skeltal muscle
Why is myofibril? correct answers any of the elongated contractile threads found in striated
muscle cells.
What are poins of origin? correct answers the attachment site that doesn't move during
contraction
What are points of insertion. correct answers attachment site that does move when the muscle
contracts.
What is a nueromuscular junction. correct answers connects the nervous system to the
muscular system via synapses between efferent nerve fibers and muscle fibers
Describe skeletal muscle. correct answers those which attach to bones and have the main
function of contracting to facilitate movement of our skeletons
Describe smooth muscle. correct answers sometimes known as Involuntary muscle due to our
inability to control its movement
Describe cardiac muscle. correct answers Found in the walls of the heart is also sometimes
known as Involuntary muscle due to our inability to control its movements,
What s an agonist? correct answers muscles that associate with motion itself by shortening
with contraction to produce a movement
What is an antagonist? correct answers muscles that act as opposing muscles to agonists,
usually contracting as a means of returning the limb to its original, resting position.
What is a bursae? correct answers a fluid-filled sac or saclike cavity, especially one
countering friction at a joint.
What are aponeuroses? correct answers a sheet of pearly-white fibrous tissue that takes the
place of a tendon in sheetlike muscles having a wide area of attachment.
Describe muscle fibers? correct answers A cylindrical, multinucleate cell composed of
numerous myofibrils that contracts when stimulated.
What is actin? correct answers a protein that forms the contractile filaments of muscle cells,
and is also involved in motion in other types of cells.
What is myocin? correct answers a fibrous protein that forms (together with actin) the
contractile filaments of muscle cells and is also involved in motion in other types of cells.
What is acetylcholine and how does it affect muscle? correct answers a compound that occurs
throughout the nervous system, in which it functions as a neurotransmitter.