CH.10- SKELETAL MUSCLE

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Convergent

fan-shaped with a broad origin which converges at one end into a tendon.

Give the Characteristics of a Bipennate:

fascicles are inserted into the tendon from each side (from 2 sides).

Pennate

feather shaped with a tendon running the length of the muscle.

Circular

forms a ring around a body opening.

Prime Mover:

"Agonist"

What is the relationship between a muscle fiber, a muscle cell and a myocyte?

A muscle fiber is made up of muscle cells, and a myocyte is a type of cell responsible for contraction.

Give an example of a Fusiform muscle:

Biceps brachii.

Endomysium

Connective tissue which surrounds an individual muscle cell.

What are the 5 functions of Skeletal Muscle?

Movement, Stability, Communication, Control of Body Openings and Passages, Heat production & Glycemic control.

What is a Muscle fiber?

Muscle cell.

Give 2 examples of Unipennate muscles:

Palmar interosseous, semimembranous

Give 2 examples of a Convergent muscle:

Pectoralis major, temporalis.

What is a Myocyte?

Type of cell found in cardiac muscle responsible for contraction.

Give the 3 catagories of Pennate muscle.

Unipennate, Bipennate and Multipennate.

What is an Aponeurosis?

a broad sheet-like tendon which is connected to some muscles.

Fascicle

a group of muscle fibers which can be seen as "parallel strands" in a muscle (or in meat)

Agonist:

aka "Prime Mover"- the muscle that produces the most force of a particular action.

Epimysium

connective tissue that surrounds the outside of an entire muscle.

Perimysium

connective tissue which surrounds and seperates a muscle into fascicles.

Tendon

connects a muscle to a bone; Very Strong!

Give an example of a Multipennate muscle:

deltoid

Parallel

long uniform width w/parallel fascicles.

Synergist:

muscle which aids the agonist.

Antagonist:

opposes the "prime mover" causes the opposite action of the "prime mover".

Give 2 examples of a Parallel muscle:

rectus abdominus, sartorious.

Give an example of a Bipennate muscle:

rectus femoris

Fascia

sheet of connective tissue that surrounds and seperates individual muscles from each other and from surrounding tissue & skin.

Fixator or Stabilizer:

stabilizes the joint so a agonist can contract properly or it stabilizes the origin of the prime mover

Give the Characteristics of a Unipennate:

tendon runs down one side of the muscle.

Give the Characteristics of a Multipennate:

tendon splits into multiple sections.

What is the difference between a Tendon and an Aponeurosis?

tendons connect muscles to bone and aponeurosis is very flattened tendon that connects SOME muscles.

Origin:

the boney site of attachment of a muscle at the relatively stationary end.

What do Tendons connect?

the muscle to bone.

Insertion:

the part of the bone that serves as the attachment site for a muscle.

Innervation:

the supply of nerves to a specific body part

Fusiform

thick middle and tapered at each end into a tendon.

Action:

type of movement a muscle produces


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