Muscle Review Packet Answer Key
Name the Muscles:
1. Latissimus dorsi
2. Orbicularis oris
3. Platysm
4. Sternocleidomastoid
5. Frontalis
6. Zygomaticus
7. Buccinator
8. Orbicularis oculi
10. Trapezius
12. External oblique & Rectus
abdominus
13. Masseter & Temporalis
16. Pectoralis major
17. Deltoid
Chapter 6 Text Review:
4. b
10. Origin – immovable end
Insertion – moveable end;
during
contraction, the
insertion moves
toward the origin
12. Prime mover – muscle that has
major responsibility for
causing a particular movement
ex: biceps – arm flexion
Synergist – aids prime mover by
causing same movement
(less effectively) or by
stabilizing joints or bones
on which the prime mover
acts ex: temporalis – aids
masseter
*Prime mover may be an antagonist
also ex: biceps – antagonist to
triceps (arm extension)
13. Masseter (prime mover for
chewing)
frontalis – forehead - move
eyebrows
buccinators – cheek –
whistle
orbicularis oris – lips – kiss
14. Trapezius (extends neck)
15. Pectoralis major & Latissimus
dorsi
16. Prime mover – biceps
Antagonist – triceps
17. The 4 muscle pairs are
arranged so that their fibers run
in different directions, much as
sheets of wood grains are
compressed together to make
plywood – extremely strong for
its thickness
3. Any muscle that inserts on the
clavicle – trapezius
6. Abnormal lateral curvature of the
spine = scoliosis – caused by
unequal muscle pull on the
spine
5. The pesticide is a chemical that
inhibits the enzyme that breaks
down acetylcholine.
Acetylcholine remains in the
synapse & stimulates skeletal
muscle activity
Vocab:
1. e
2. h
3. frontalis (j) – epicranial muscles
4. i
5. skip (g)
6. b
7. a
8. c
9. k
10. f
Multiple Choice - Part A
1. c
2. a
3. b
4. c
5. a
6. c
7. c
8. d
9. b
10. c
Fill in the Blank - Part B
1. origin
2. deltoid
3. contraction
4. belly (body)
5. circumduction
Muscle Recognition Review
1. t
2. v
3. y
4. u
5. g
6. e
7. q
8. w
9. c
10. r
11. b
12. d
13. a
14. s
15. f
16. h
1.
2.
3.
4.
5.
k
j
i
a
l
Review Guide:
1. Buccinator
2. Zygomaticus
3. Orbicularis oculi
4. Platysma
5. Frontalis
6. Orbicularis oris
7. Masseter
8. External oblique
9. Rectus abdominus
10. Sternocleidomastoid
11. Deltoid
12. Pectoralis major
13. Trapezius
14. Latissimus dorsi
15. Temporalis
16. directly to the periosteum
by tendons (cords of connective
tissue)
by an aponeurosis (sheet of
connective tissue)
17. flexion – bending the elbow
extension – standing up (legs)
abduction – moving leg out to
side of body
adduction – moving arm toward
midline of body
rotation – turning head from
side to side
circumduction – pitching a
baseball
18. The skeletal muscle pull on the
insertion (distal attachment)
causing the bone/limb to move
toward the origin (proximal
attachment)
*the muscle moves the body part it inserts into*
19. Muscles work in groups
20. Superficial muscles are closest
to the body surface & provide
contours (shape)
Deep muscles are beneath
the superficial muscles, closest
to the internal organs
21. Action - adductors
Direction of fibers – obliques
(diagonal)
Location – frontalis over frontal
bone
Shape – deltoid triangular
Size – gluteus maximus large
# of attachments – biceps 2
origins
points of attachment –
sternocleidomastoid
(sternum, clavicle, mastoid process)
22. True
23. Flexion of the wrist (radial side)
24. In humans, each muscle is one
large muscle but in cats they are
separated into 3 distinct muscles
25. Facial muscles may insert into
other muscles or connective
tissues rather than just over
bones
KNOW THE HUMAN & CAT
DIAGRAMS ~ half the quiz