An entire skeletal muscle is covered by a coarse sheath called
endomysium
perimysium
epimysium
aponeurosis
Muscles that are arranged like the feathers in a plume are described as
parallel
convergent
sphincter
pennate
An aponeurosis is
broad and flat
tube shaped
featherlike
none of the above
Antagonists are muscles that
oppose prime movers
facilitate prime movers
stabilize muscles
directly perform movements
A fixed point about which a rod moves is called a
lever
bone
belly
fulcrum
In first-class levers, the
fulcrum is between the pull and the load
load is between the fulcrum and the force
force is between the fulcrum and the load
load and force are equal
The origin of a muscle is the point of attachment that moves when the muscle contracts.
Skeletal muscles usually act in groups rather than individually.
Prime mover and agonist are synonymous.
The optimum angle of pull of a muscle is generally parallel to the long axis of the bone.
Tipping the head back, as in looking up at the sky, is an example of the function of a first-class lever.
Shape: ❌ Location: ❌ Points of attachment: ❌ Number of heads: ❌ Size of muscle: ❌ Function: ❌ Direction of fibers: ❌
❌: wrinkling the forehead vertically ❌: grating the teeth during mastication ❌: kissing ❌: raising the eyebrows ❌: flexing the head ❌: closing the eyes
Label the following diagram
The external oblique compresses the abdomen.
The rectus abdominis flexes the trunk.
The levator ani closes the anal canal.
The external intercostals elevate the ribs.
The coccygeus muscles and levator ani form most of the pelvic floor.
The muscles of the anterior and lateral abdominal wall are arranged in 3 layers.
Label the following diagram: Muscles of the Thorax
Label the following diagram: Muscles of the trunk and abdominal
❌: bends head and neck laterally ❌: elevates ribs ❌: enlarges thorax ❌: "prayer" muscle ❌: provides important postural function ❌: flexes trunk ❌: depresses last rib ❌: extends vertebral column ❌: helps from the floor of the pelvic cavity ❌: assists in laughing
Fascicles are bound together into bundles by a tough connective tissue envelope called the .
muscles have fascicles that radiate out from a small to a wider point of attachment, much like the blades in a fan.
The prime mover is also known as the .
When a muscle shortens, the central body portion called the contracts.
Lever systems have four component parts: a lever, a fulcrum, a load and a / .
During the diaphragm flattens.
The muscular pelvic floor filling the diamond-shaped outlet is called the .
A is any rigid bar free to turn about a fixed point called its fulcrum.
The deltoid is so-named because of its descriptive .
The powerful muscles that either elevate or retract the mandible are the and the .
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