Muscular system

Question 1

Nomenclature of skeletal muscles

Answer 1

Question 2

Nomenclature of skeletal muscles

• Size

Answer 2

1. vastus (huge);
2. maximus (large);
3. longus (long);
4. minimus (small);
5. brevis (short).

Question 3

Nomenclature of skeletal muscles: shape

Answer 3

1. deltoid (triangular);
2. rhomboid (like a rhombus with equal and parallel sides);
3. lattissimus (wide);
4. teres (round);
5. trapezius (like a trapezoid, a four-sided figure with two sides parallel).

Question 4

Nomenclature of skeletal muscles: direction of fibres

Answer 4

1. rectus (straight);
2. transverse (across);
3. oblique (diagonally);
4. orbicularis (circular).

Question 5

Nomenclature of skeletal muscles: location

Answer 5

1. pectoralis (chest);
2. gluteus (buJock or rump);
3. brachii (arm);
4. supra- (above);
5. infra- (below);
6. sub- (under or beneath);
7. lateralis (lateral).

Question 6

Nomenclature of skeletal muscles

• Number of origins:

Answer 6

1. biceps (two heads)
2. triceps (three heads);
3. quadriceps (four heads).

Question 7

Nomenclature of skeletal muscles:Sites of origin and insertion

Answer 7

1. sternocleidomastoideus (origin on the sternum and clavicle, insertion on the mastoid process);
2. brachioradialis (origin on the brachium or arm, insertion on the radius).

Question 8

Nomenclature of skeletal muscles:action

Answer 8

1. abductor (to abduct a structure);
2. adductor (to adduct a structure)
3. ; flexor (to flex a structure);
4. extensor (to extend a structure);
5. levator (to lia or elevate a structure);
6. masseter (a chewer).

Question 9

Answer 9

Question 10

Fascicle (Muscle bundle) Arrangements

Answer 10

Question 11

Muscle AJachment Sites: Origin and InserLon

Answer 11

Question 12

direction of muscle fibers,

Answer 12

1. rectus (e.g., rectus abdominis)
2. transverse (e.g., transversus abdominis)
3. oblique (e.g., external oblique)

Question 13

size, such as:

Answer 13

size, such as:

1. maximus (e.g., gluteus maximus)
2. minimus (e.g., gluteus minimus)
3. longus (e.g., adductor longus)
4. brevis (e.g., peroneus brevis)

Question 14

shape, such as:

Answer 14

1. deltoid
2. trapezius
3. serratus (e.g., serratus anterior)
4. rhomboid (e.g., rhomboid major)

Question 15

action

Answer 15

action, such as:
! flexor (e.g., flexor carpi radialis)

Question 16

Answer 16

extensor (e.g., extensor carpi ulnaris)

Question 17

Answer 17

action:

abductor (e.g., abductor pollicis brevis)

Question 18

Answer 18

action:

adductor (e.g., adductor longus

Question 19

Answer 19

action:

levator (e.g., levator scapulae

Question 20

Answer 20

action:

depressor (e.g., depressor labii inferioris)

Question 21

Answer 21

action:

pronator (e.g., pronator teres)

Question 22

Answer 22

action:

sphincter (e.g., external anal sphincter

Question 23

Answer 23

action:

tensor (e.g., tensor fasciae latae

Question 24

Answer 24

action:

rotator (e.g., rotatore)

Question 25

Answer 25

number of origins, such as:

• biceps (e.g., biceps brachii)

Question 26

Answer 26

number of origins,

triceps (e.g., triceps brachii

Question 27

Answer 27

number of origins,

quadriceps (e.g., quadriceps femoris)

Question 28

location muscle examples

Answer 28

1. frontalis,
2. tibialis anterior

Question 29

Answer 29

origin and insertion (e.g., sternocleidomastoid)

Question 30

Answer 30

origin and insertion (e.g., stylohyoid)