40A - Lab - Exercise #14

Question 0

2

Answer 0

Orbicularis oris

Action: closes mouth

Question 1

1

Answer 1

Orbicularis Oculi

Action: closes eye

Question 2

3

Answer 2

Sternocleidomastoid
Origin: sternum and clavicle
Insertion: mastoid process of temporal bone
Action: 1. One muscle contracting (R/L) laterally rotates and flexed head opposite sides
2. Both muscles contacting flexes head forward

Question 3

4

Answer 3

Platysma

Question 4

5

Answer 4

Pectoralis major

Question 5

6

Answer 5

External oblique
Action: 1. One muscle contracting laterally bends torso side to side
2. Both muscles contracting will flex vertebral column and contract abdominal muscles

Question 6

7

Answer 6

Rectus abdominis 
Origin: pubic symphysis and pubic crest
Insertion: costal cartilage of ribs and xiphoid process of sternum
Action: 1. Flexes vertebral column 
2. Compresses abdomen with contractions

Question 7

8

Answer 7

External intercostals

Action: raises ribs on inhalation, to increase size of thoracic cavity

Question 8

9

Answer 8

Internal intercostals

Action: lowers ribs on exhalation, to decrease the size of the thoracic cavity

Question 9

10

Answer 9

Diaphragm

3 opening: esophageal hiatus, aortic hiatus, caval opening

Question 10

11

Answer 10

Trapezius

Question 11

12

Answer 11

Deltoid

Question 12

13

Answer 12

Latissimus Dorsi

Question 13

14

Answer 13

Biceps brachii
Origin: 2 tendons on scapula 
Insertion: radius (proximal)
Action: 1. Flexes arm at shoulder joint
2. Flexes forearm at elbow joint

Question 14

15

Answer 14

Brachialis
Origin: humerus
Insertion: ulna (proximal)
Action: flexes forearm at elbow joint

Question 15

16

Answer 15

Triceps brachii
Origin: humerus (proximal) and scapula
Insertion: ulna (proximal)
Action: extends forearm at elbow joint

Question 16

17

Answer 16

Brachioradialis
Origin: humerus (distal)
Insertion: radius (distal)
Action: flexes forearm at elbow joint

Question 17

18

Answer 17

Flexor Capri radialis
Origin: humerus
Insertion: metacarpals
Action: flexes hand at wrist joint

Question 18

19

Answer 18

Extensor carpi radialis
Origin: humerus
Insertion: metacarpals
Action: extends hand at wrist joint

Question 19

20

Answer 19

Rectus femoris
Origin: ilium of coxal bone
Insertion: patella and tibial tuberosity
Action: 1. Flex thigh at the hip joint 
2. Extend leg at the knee joint

Question 20

21

Answer 20

Vastus lateralis
Origin: femur
Insertion: patella and tibial tuberosity
Action: extend leg at the knee joint

Question 21

22

Answer 21

Vastus intermedius
Origin: femur
Insertion: patella and tibial tuberosity
Action: extend leg at the knee joint

Question 22

23

Answer 22

Vastus medialis
Origin: femur
Insertion: patella and tibial tuberosity
Action: extend leg at the knee joint

Question 23

24

Answer 23

Semitendinosus
Origin: Ishcial tuberosity
Action: 1. Flex leg at the knee joint
2. Extend thigh at the hip to move leg backwards

Question 24

25

Answer 24

Semimembranosus
Origin: Ishcial tuberosity
Action: 1. Flex leg at the knee joint
2. Extend thigh at the hip to move leg backwards

Question 25

27

Answer 25

Sartorius
Action: 1. Flexes leg at the knee joint
2. Flexes, abducts, and laterally rotates thigh at the hip to allow us to sit cross legged.

Question 26

26

Answer 26

Biceps Femoris
Origin: Ishcial tuberosity
Action: 1. Flex leg at the knee joint
2. Extend thigh at the hip to move leg backwards

Question 27

28

Answer 27

Gluteus maximus
Action: 1. Extend thigh at the hip to move backwards
2. Rotates thigh laterally

Question 28

29

Answer 28

Gracilis
Action: 1. Flexes leg at knee
2. Adducts thigh
3. Medially rotates thigh

Question 29

30

Answer 29

Tibialis anterior
Origin: tibia
Insertion: metatarsals
Action: dorsiflexes the foot at the ankle

Question 30

31

Answer 30

Gastrocnemius
Origin: lateral and medial condyle of femur
Insertion: calcaneus by calcaneal tendon
Action: 1. flexes the leg the knee joint
2. Planter flexes foot at ankle joint

Question 31

32

Answer 31

Soleus

Beneath gastrocnemius

Question 32

33

Answer 32

Calcaneal tendon (Achilles tendon)