BIO201 Muscles Practical 3

Question 1

masseter

Answer 1

Origin: maxilla and zygomatic arch
Insertion: angle and ramus of mandible

Question 2

sternocleidomastoid

Answer 2

Origin: manubrium and medial clavicle Insertion: mastoid process of temporal bone

Question 3

pectoralis major

Answer 3

Origin: clavicle, sternum, costal cartilage of vertebrosternal ribs
Insertion: greater tubercle of humerus

Question 4

rhomboid major

Answer 4

Origin: spinous processes of T2-5 Insertion: medial margin of scapula

Question 5

deltoid

Answer 5

Origin: clavicle, spine of scapula, and acromion process of scapula Insertion: deltoid tuberosity

Question 6

biceps brachii

Answer 6

Origin: coracoid process of scapula and supraglenoid tuberosity
Insertion: radial tuberosity

Question 7

triceps brachii

Answer 7

Origin: lower glenoid fossa of scapula and two locations on humerus
Insertion: olecranon process

Question 8

flexor carpi ulnaris

Answer 8

Origin: medial epicondyle of humerus, olecranon process
Insertion: base of metacarpals 5, and carpal (pisiform)

Question 9

Extensor carpi radialis longus

Answer 9

Origin: lateral ridge of distal humerus
Insertion: base of metacarpal

Question 10

Rectus abdominus:

Answer 10

Origin: superior pubic bone, pubic symphysis
Insertion: xiphoid process, costal cartilage of ribs 5-7

Question 11

Rectus femoris:

Answer 11

Origin: anterior inferior ilium Insertion: patella

Question 12

Biceps femoris

Answer 12

Origin: ischial tuberosity and femur
Insertion: head of fibula, lateral condyle of tibia

Question 13

Tibialis anterior

Answer 13

Origin: lateral condyle of tibia
Insertion: medial tarsal and metatarsal 1

Question 14

Gastrocnemius

Answer 14

Origin: 1) medial condyle of femur 2) lateral condyle of femur
Insertion: Achilles tendon (calcaneon tendon)

Question 15

Flexor hallucis longus

Answer 15

Origin: medial shaft of fibula and interosseous membrane
Insertion: under arch of foot to distal phalanx of great toe