Lab 7: The Sarcomere + The Muscular System 2

How does the size of the I-Band and H-band change when the sarcomere contracts? Relaxes?

Contracts = smaller

Relaxes = larger

How does the size of the A-band change when the sarcomere contracts? When it relaxes?

Does not change

Deltoid (cut)

Biceps Brachii: Short Head

Biceps Brachii: Long Head

Triceps Brachii: Short Head

Triceps Brachii: Long Head

Biceps Brachii

Brachioradialis

Pronator Quadratus

Iliacus

Iliac Crest

Rectus Femoris

Vastus Lateralis

Psoas Major

Adductor Longus

Gracialis

Adductor Magnus

Sartorius

Vastus Medialis

Quadriceps (patellar) Tendon

Patellar Ligament

Iliac Crest

Obturator Internis

Gluteus Maximus (cut)

Semimembranosus

Semitendinosus

Gluteus Medius (cut)

Gluteus Minimus

Piriformis

Superior Gemellus

Inferior Gemellus

Obturator Externus

Quadratus Femoris

Biceps Femoris

Gastrocnemius (cut): Lateral Head

Gastrocnemius (cut): Medial Head

Soleus

Calcaneal (Achilles) Tendon

Calcaneus

Tibialis Anterior

Deltoid

Origin: Acromion and spine of scapula

Insertion: Deltoid tuberosity of humerus

Action: Adduction of humerus

Supraspinatus

Origin: Supraspinatus fossa of scapula

Insertion: Greater tubercle of humerus

Action: Abduction of humerus

Infraspinatus

Origin: Infraspinatus fossa of scapula

Insertion: Greater tubercle of humerus

Action: External rotation of humerus

Teres Minor

Origin: Scapula

Insertion: Greater tubercle of humerus

Action: External rotation of humerus

Subscapularis

Origin: Subscapular fossa of scapula

Insertion: Lesser tubercle of humerus

Action: Internal rotation and adduction of humerus

Biceps Brachii

Origin: Long head: superior edge of glenoid cavity Short head: coracoid process

Insertion: Tuberosity of radius

Action: Flexes elbow

Brachioradialis

Origin: Humerus

Insertion: Radial Styloid Process

Action: Flexes elbow

Triceps Brachii

Origin: Long Head: inferior edge of glenoid cavity Lateral Head: posterior humeral shaft Medial Head: posterior humeral shaft

Insertion: Olecranon

Action: Adducts humerus

Pronator Quadratus

Origin: Ulna

Insertion: Radius

Action: Pronates Forearm

Gluteus Maximus

Origin: Coccyx

Insertion: Gluteal tuberosity of femur

Action: Extends thigh

Gluteus Medius

Origin: Ilium

Insertion: Gluteal tuberosity of femur

Action: Adducts thigh

Gluteus Minimus

Origin: External surface of ilium

Insertion: Greater trochanter of femur

Action: Adducts thigh

Rectus Femoris

Origin: Ilium

Insertion: Patella

Action: Extends knee

Vastus Lateralis

Origin: Greater trochanter

Insertion: Patella

Action: Extends knee

Vastus Intermedius

Origin: Femur at proximal, anterior, and lateral surfaces

Insertion: Patella

Action: Extends knee

Biceps femoris

Origin: Ischial tuberosity

Insertion: Tibia

Action: Extends thigh

Semitendinosus

Origin: Ischial tuberosity

Insertion: Tibia

Action: Extends thigh

Tibialis Anterior

Origin: Tibia

Insertion: Ankle

Action: Dorsiflexes foot

Gastrocnemius

Origin: Femur at condyle

Insertion: Posterior calcaneus

Action: Plantar flexes foot

Soleus

Origin: Tibia

Insertion: Posterior calcaneus

Action: Plantarflexion

Z-disc

Number 1

Tropomyosin

Number 2

Troponin (which binds to calcium)

Number 3

Thin Filament (which is made of actin)

Number 4

Thick Filament (which is made of myosin)

Number 5

M-line

Number 6

Number 7

H-zone

I-band

Number 8

A-band

Number 9

Sacromere

Number 10