CH.10- SKELETAL MUSCLE
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
