Chapter 15

Question 1

There are more than ____ skeletal muscles in the body

Answer 1

6000

Question 2

From ____ to _____ of our body weight is skeletal muscles

Answer 2

40-50%

Question 3

Muscles fill in the ___ and _____ of the body

Answer 3

Form and contour

Question 4

Endomysium

Answer 4

Delicate CT membrane that covers skeletal muscle fibers

Question 5

Muscle fibers=

Answer 5

Muscle cells

Question 6

Perimysium are

Answer 6

Tough CT that binds groups of skeletal muscle fibres which are called fasicles (together)

Question 7

Epimysium

Answer 7

Coarse sheath that covers the muscle as a whole

Question 8

3 structures that fuse to become a tendon

Answer 8

Endomysium
Perimysium
Epimysium

Question 9

The endomysium may extend as a

Answer 9

Flat, broad sheet of CT called an aponeurosis which typically merges wit hthe epimysuim of another

Question 10

Tendons and aponeuroses are very ______ and often are not torn but _________

Answer 10

Strong

Pulled off bones

Question 11

Most muscle span at least ______

Answer 11

One joint, attaching to the bone on either side

Question 12

Origin of muscle

Answer 12

Point of attachement to the bone that remain fixed when movement at joint occurs

Question 13

Insertion of muscle

Answer 13

Point of attachment to the bone that moves when a muscle contracts

Question 14

Body of muscle

Answer 14

Main part of the muscle

Question 15

Most body movements are produced dby the ______________

Answer 15

Coordinated action of groups of muscle. Somemuscles contract others relax

Question 16

Types of main muscles involved in a movement (4)

Answer 16

Prime mover (agonist)
Synergist
Antagonist
Fixator

Question 17

Primemover (agonist) main contraction is

Answer 17

Mainly responsible for producing a movement

Question 18

A synergist contraction

Answer 18

Helps the prime mover produce a movement

Question 19

The antagonist actions

Answer 19

Oppose the action of the prime mover in a movement

Question 20

Fixator functions

Answer 20

As a joint stabilizer

Question 21

In the upper arm the bicep is ___ the brachialis is ____ and the tricep is _____

Answer 21

Prime mover

Brachialis

Antagonist

Question 22

Muscle movement resembles a _______ system

Answer 22

Lever and fulcrum

Bone are levers

Joints are falcrum

Question 23

Movement is caused by

Answer 23

The ability of muscle cells to shorten of contract

Question 24

Muscle cells are called

Answer 24

Fibers

Question 25

All muscle fibers specialize in

Answer 25

Contraction (shortening)

Question 26

Muscles are named according to whch 4 thinfs

Answer 26

1. Location, function, shape, direction of fibers
2. Number of heads or divisions
3. Points of attachment
4. Relative size- small, medium or large

Question 27

3 muscles of the thorax

Answer 27

External intercostals
Internal intercostals
Diaphragm

Question 28

Fibres in the abdominal wall run is _______ to ____________

Answer 28

Different directions to increase strength

Question 29

3 abdominal wall layers

Answer 29

Rectus, transverse, oblique

Question 30

Muscles of the abdominal wall

Answer 30

External oblique 
Internal oblique
Transverse abdominis
Rectus abdominis 
Quadratus lumborum

Question 31

Muscles of the back ____- or _____ the back

Answer 31

Bend or stabilize

Question 32

Muscle of the back include

Answer 32

Sternocleidomastoid
Trapezius
Deltoid
Latissimus dorsi