Muscles

Front 1

what are the eight different muscle fiber patterns?

Back 1

Strap, Fusiform, Tricipital, Pennate, Bipennate, Multipennate, Triangular, Spiral

Front 2

Strap (muscle fiber)

Back 2

muscle fibers run parallel to each other. the muscles in the front of the abdomen are examples.

Front 3

Fusiform (muscle fiber)

Back 3

The muscle bulges in the middle and the fibers taper together at the ends, for example, the biceps brachii.

Front 4

Tricipital (muscle fiber)

Back 4

The fibers divide into three sets from a common starting point.

Front 5

Pennate (muscle fiber)

Back 5

The muscle fibers run in a diagonal direction from a central tendon.

Front 6

Multipennate (muscle fiber)

Back 6

Pennate muscle fibers run diagonally in multiple directions from central tendons, for example, the deltoids.

Front 7

Bipennate (muscle fiber)

Back 7

From a central tendon, muscle fibers run diagonally to both sides, for example the rectus femoris.

Front 8

Triangular (muscle fiber)

Back 8

The fibers taper together at one end.

Front 9

Spiral (muscle fibers)

Back 9

The fibers are aligned in parallel and the entire structure twists, for example, the latissimus dorsi.

Front 10

All-or-none response

Back 10

The muscle cell will contract completely or not at all.

Front 11

Antagonist

Back 11

A muscle that relaxes when another muscle contracts to cause movement or force.

Front 12

Bursae

Back 12

Fluid-filled cushioning sacs between bone and any other tissue such as tendons, ligaments, skin or muscles. They are filled with synovial fluid, like a joint capsule.

Front 13

Fixator

Back 13

A muscle that holds part of a joint steady so that the other part can move to produce movement of the body part. Fixators are also called stabilizers.

Front 14

Insertion

Back 14

Where a skeletal muscle attaches to a moving bone at the far end, or distal, form the body.

Front 15

Neutralizer

Back 15

A muscle that works in opposition to another muscle to prevent movement.

Front 16

Origin

Back 16

Where a skeletal muscle attaches to a stationary bone at the end nearest, or proximal, to the body.

Front 17

Prime mover

Back 17

A muscle that contracts to produce a particular movement. Another term for the prime mover is agonist.

Front 18

Synergist

Back 18

A muscle that contracts at the same time as a prime mover.

Front 19

Tendon

Back 19

Connective tissue that attaches muscle to bone.

Front 20

Threshold stimulus

Back 20

The minimum necessary nerve impulse to produce a muscle contraction.

Front 21

Abductor

Back 21

Moves a body part away from the body midline

Front 22

Adductor

Back 22

Moves a body part toward the body midline

Front 23

Biceps

Back 23

Two heads

Front 24

Brevis

Back 24

Shortest

Front 25

Deltoid

Back 25

Triangular

Front 26

Depressor

Back 26

Produces a downward movement

Front 27

Extensor

Back 27

Widens the angle between two bones at a joint

Front 28

Flexor

Back 28

Makes the angle smaller between two bones at a joint

Front 29

Gracilis

Back 29

Slender

Front 30

Latissimus

Back 30

Widest

Front 31

Levator

Back 31

Producing lifting motions.

Front 32

Longissimus

Back 32

Longest

Front 33

Longus

Back 33

Long

Front 34

Magnus

Back 34

Large

Front 35

Major

Back 35

Largest

Front 36

Oblique

Back 36

Diagonally from the middle

Front 37

Orbicularis

Back 37

Circular

Front 38

Pectinate

Back 38

Like a comb

Front 39

Piriformis

Back 39

Pear-shaped

Front 40

Platys

Back 40

Flat

Front 41

Piriformis

Back 41

Pear-shaped

Front 42

Pronator

Back 42

Turning down or backward

Front 43

Quadratus

Back 43

Square

Front 44

Quadriceps

Back 44

Four heads

Front 45

Rectus

Back 45

Parallel to the middle

Front 46

Rhomboid

Back 46

Diamond-shaped

Front 47

Rotator

Back 47

Moving around an axis

Front 48

Serratus

Back 48

Saw-tooth shaped

Front 49

Sphincter

Back 49

Decreases and opening

Front 50

Supinator

Back 50

Turning upward or forward

Front 51

Tensor

Back 51

Holds rigid

Front 52

Transverse

Back 52

Perpendicular to the middle

Front 53

Trapezius

Back 53

Trapezoid-shaped

Front 54

triceps

Back 54

Three heads