Chapter 11

Question 1

Antagonist

Answer 1

has opposite affect, or works against

Question 2

Fixator

Answer 2

muscle that functions as a joint stabilizer

Question 3

Instertion

Answer 3

attachment of a muscle to a bone, that it moves when contraction occurs

Question 4

Lever

Answer 4

any rigid bar free to turn about a fixed point

Question 5

Orgin

Answer 5

attachment of a muscle to the bone, which does NOT move when contraction occurs

Question 6

Perineum

Answer 6

area between anus and genitals

Question 7

Posture

Answer 7

position of the body, often refers to the erect position of the body maintained unconsciously

Question 8

Prime mover

Answer 8

main muscle responsible for producing a particular movement

Question 9

Synergist

Answer 9

muscle that assist a prime mover

Question 10

Endomysium

Answer 10

delicate connective tissue membrane that covers specialized skeletal muscle fibers

Question 11

Perimysium

Answer 11

IN endomysium- tough connective tissue binding together fascicles

Question 12

Epimysium

Answer 12

in perimysium-course sheath covering the muscle as a whole

Question 13

600 skeletal muscles

Answer 13

.

Question 14

Muscles can attach to tendons or directly to bones

Answer 14

.

Question 15

Bones serve as levers and joints serve as fulcrums

Answer 15

contracting muscle applies a pulling force on a bone lever at the point of the muscle attachment to the bone causing the insertion bone to move about its joint-fulcrum

Question 16

Level System 4 composed parts

Answer 16

Rigid bar (bone)
Fulcrum (F) around which the rod moves (joints)
Load (L) that is moved
Pull (P) that produces movement (muscle contraction)

Question 17

Level 3

Answer 17

pull is extended between the function and the load
permit rapid and extensive movement
most common type of lever found in the body

Question 18

Muscles of facial expressions (closest to the brain)

Answer 18

unique in that at lease one point of attachment is to the deep layers of the skin over the face or neck

Question 19

Muscles of mastication

Answer 19

responsible for chewing

Question 20

Paired muscles on either side of the neck responsible for head movement

Answer 20

.

Question 21

Muscles of the thorax (trunk muscle)

Answer 21

critical importance to respiratoin

Question 22

Muscles of the abdominal wall

Answer 22

arranged in three layers with fibers in each layer running in different directions to increase strength, holds everything in

Question 23

Muscles of the back

Answer 23

bend or stabilize the back

Question 24

An entire skeletal muscle is covered by a coarse sheath called?

Answer 24

Epimysium

Question 24

Muscles of the pelvic floor

Answer 24

support the structures in the pelvic cavity, holds everything up

Question 25

Muscles that are arranged lik the feather in a plume are described as

Answer 25

Pennate

Question 26

The aponeurosis is

Answer 26

Broad and flat

Question 27

Antagonists are muscles that

Answer 27

Oppose prime movers

Question 28

A fixed point about which a rod moves is

Answer 28

Fulcrum

Question 29

In first class levers..

Answer 29

Fulcrum is between the pull and the load

Question 30

``` All of the following are rotator cuff muscles EXCEPT Deltoid Infraspinatus Supraspinatus Tres minor ```

Answer 30

Deltoid

Question 31

The muscles that shrug the shoulders is the

Answer 31

Trapezius

Question 32

A common site for intramuscular injections is

Answer 32

The gluteus medius

Question 33

Plantar flexion of the foot is achieved by

Answer 33

Soleus

Question 34

``` The muscles of the hamstring include all of the following except Iliopsoas Semitendinous Semimembranous Biceps femoris ```

Answer 34

Iliopsoas