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33 terms

Muscular System Quiz

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Muscular system-
600 muscles that make up the human body and help us to move
Voluntary-
requires thought to move a muscle in your body
involuntary-
does not require thought to do something in your body
smooth muscle-
moves food throughout the digestive system
also help blood vessels pump blood throughout the body
cardiac muscle-
pumps blood throughout the body
skeletal muscle-
enables bones to move
flexor-
a muscle that bends part of your body
extensor-
a muscle that straightens part of your body
tendons-
strands of connective tissue that connect your bones to your muscles
resistance exercise-
when skeletal muscles are strengthened
aerobic exercise-
when endurance is increased by exercising
strain-
an injury in which a muscle or tendon is swollen or inflamed
the muscle becomes overstretched or torn
tendonitis-
a condition in which a tendon becomes inflamed
anabolic steroids-
synthetic (man-made) testosterone which is the male hormone that signals the body to add muscle fiber.
twitch-
a short single contraction
tetanus-
a long sustained contraction
contraction-
the basic action of any muscle
muscle-
a bundle of many cells called fibers
actin-
protein that makes up the thin filaments in a muscle fiber
myosin-
protein that makes up the thick filaments in a muscle fiber
myofibrils-
a basic rod-like unit of a muscle; composed of protein
Label the "muscle man"
http://www.diigo.com/item/image/3e2q8/m3br
Label the muscle fiber
http://www.diigo.com/item/image/3e2q8/htbj
What kind of muscle is a smooth muscle?
involuntary
What kind of muscle is a skeletal muscle?
voluntary
What kind of muscle is a cardiac muscle?
involuntary
Where is a smooth muscle found in your body?
found in the digestive tract and in the walls of blood
vessels
Where is a skeletal muscle found in your body?
attached to your bones for movement
Where is a cardiac muscle found in your body?
found only in your heart
How does a muscle contract?
When you want to move, signals travel from your brain to your skeletal muscle cells. The muscle cells then contract, or get shorter.
In the arm muscle, is the bicep the flexor or extensor?
flexor
In the arm muscle, are the triceps the flexor or extensor?
extensor
What do the actin and myosin do during contraction?
the myosin thick filaments grab on to the actin thin filaments by forming cross-bridges. The thick filaments pull the thin filaments past them, making the fiber shorter