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32 Cards in this Set

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Identify the connective tissue membrane that covers individual muscle fibers,
endomysium
Identify the connective tissue membrane that surrounds groups of skeletal muscle fibers (fascicles)
perimysium
Identify the connective tissue membrane that covers the muscle as a whole
epimysium
Name the tough connective tissue cord that serves to attach a muscle to a bone
tendon
Name three types of fiber arrangements seen in skeletal muscle
Parallel, convergent, pennate
Identify the point of attachment of a muscle to a bone that does not move when the muscle contracts
origin
Identify the point of attachment of a muscle to a bone that moves when the muscle contracts
insertion
What name is used to describe a muscle that directly performs a specific movement?
prime mover or agonist
What type of muscles helps maintain posture or balance during contraction of muscles acting on joints in the arms and legs?
fixator muscle
Name the type of muscles that generally function as joint stabilizers
fixator muscles
Name the four major components of any lever system.
A rigid rod or bar (bone), a fixed pivot, or fulcrum around which the rod moves (joint) a load or resistance that is moved, & a force, or pull, which produces movement (muscle contraction)
Identify the three types of lever systems found in the human body and give one example of each
First class levers, second class levers, and third class levers
What type of lever system permits rapid and extensive movement and is the most common type found in the body?
third class lever
List 6 criteria that may determine a muscle's name, & give an example of a specific muscle named according to each criterion
Location, function, shape, direction of fibers, number of heads or divisions, points of attachment, & size of muscle
What is meant by the terms origin and insertion?
origin is that point of attachment that does not move when the muscle contracts. insertion is the point of attachment that moves when the muscle contracts
What group of muscles provides chewing movements?
Masseter, temporalis, and pterygoids.
Which muscle of facial expression has two parts, one lying over the forehead and the other covering the back of the skull?
Occipito frontalis
What is the action of the sternocleidomastoid muscle?
Flexes head
Name the skeletal muscles that produce respiratory movements
Internal and external intercostal muscles and the diaphragm
Name two functions of the rectus abdominis muscle
Protects the abdominal viscera and flexes the spinal column
What is the perineum?
Area between the anus and genitals (pelvic floor).
What are the functions of the deltoid muscle?
Flexes and extends the arm and abducts upper arm
What is the function of the biceps brachii muscle?
Flexes supinated forearm
Distinguish the extrinsic from the intrinsic muscles of the hand and wrist.
Extrinsic muscles originating in the forearm can pull on their insertions in the wrist, hand,fingers 2 move them. Intrinsic muscles are actually w/i the part moved
Name the three gluteal muscles
Gluteus maximus, medius, and minimus
What is the function of the gastrocnemius muscle?
Extends foot and flexes lower leg
A&P Anatomy of the Muscular System
A&P Anatomy of the Muscular System
Synergist
muscle that assists a prime mover
Posture
position of the body; often refers to the erect position of the body maintained unconsciously
Fixator
muscle that functions as a joint stabilizer
Prime mover
main muscle responsible for producing a particular movement
Antagonist
muscle that directly opposes prime movers; for ex muscles that flex the upper arm are antagonists to muscles that extend it