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IUPUI BIOL N261 EXAM 3 MUSCLES
AND ACTIONS ACTUAL MIDTERM
ASSESSMENT 2025
Trapezius - ANSWER>>> Extends and abducts head, and adducts scapula, fixes scapula Deltoid
- ANSWER>>> Abducts arm; flexes, extends, medially and laterally rotates arm Pectoralis major - ANSWER>>> Flexes, adducts, and medially rotates arm Pectoralis minor - ANSWER>>> Depress glenoid cavity, raises ribs 3- 5 Latissimus dorsi - ANSWER>>> Extends, adducts, and medially rotates arm; draws shoulder inferiorly Supraspinatus - ANSWER>>> Abducts arm, helps stabilizes shoulder joint Infraspinatus - ANSWER>>> Laterally rotates arm, stabilizes shoulder joint Subscapularis - ANSWER>>> Medially rotates arm, stabilizes shoulder joint Teres minor (^) - ANSWER>>> Laterally rotates and adducts arm, stabilizes shoulder joint Biceps brachii - ANSWER>>> Flexes arm, flexes forearm, supinates hand Triceps brachii - ANSWER>>> Extends and adducts arm, extends forearm Coracobrachialis - ANSWER>>> Flexes and adducts arm
Brachioradialis - ANSWER>>> Flexes forearm Supinator - ANSWER>>> Supinates hand Pronator teres
ANSWER>>>
Pronates hand, flexes forearm Palmaris longus - ANSWER>>> Flexes hand Flexor carpi radialis (^) - ANSWER>>> Flexes and abducts hand Flexor carpi ulnaris - ANSWER>>> Flexes and adducts hand Flexor digitorum superficialis
- ANSWER>>>
Flexes proximal and middle phalanges, flexes hand Flexor pollicis longus - ANSWER>>> Flexes thumb Extensor carpi radialis longus - ANSWER>>> Extends and abducts hand Extensor carpi radialis brevis - ANSWER>>> Extends and abducts hand Extensor carpi ulnaris - ANSWER>>> Extends and adducts hand Extensor digitorum - ANSWER>>> Extends phalanges, extends hand Abductor pollicis longus - ANSWER>>> Abducts thumb Extensor pollicis longus and brevis - ANSWER>>> Extends thumb Teres major (^) - ANSWER>>> Extends, adducts, and medially rotates arm The 4 rotator cuff muscles - ANSWER>>> - Supraspinatus
Vastus lateralis - ANSWER>>> Extends leg Vastus intermedius - ANSWER>>> Extends leg Vastus medialis - ANSWER>>> Extends leg Tensor fasciae latae - ANSWER>>> Flexes, abducts, and medially rotates thigh Gluteus maximus - ANSWER>>> Extends and laterally rotates thigh, braces knee Gluteus medius - ANSWER>>> Abducts and medially rotates thigh Gluteus minimus - ANSWER>>> Abducts and medially rotates thigh The 3 hamstring muscles - ANSWER>>> - Biceps femoris (long and short head)
- Semitendinosus
- Semimembranosus Biceps femoris (^) - ANSWER>>> Extends thigh, flexes leg Semitendinosus - ANSWER>>> Extends thigh, flexes leg Semimembranosus - ANSWER>>> Extends thigh, flexes leg Gastrocnemius - ANSWER>>> Flexes leg, plantar flexes foot Soleus - ANSWER>>> Plantar flexes foot Plantaris - ANSWER>>> Flexes leg, plantar flexes foot Tibialis posterior - ANSWER>>> Plantar flexes and inverts foot Flexor digitorum longus (^) - ANSWER>>> Flexes toes, plantar flexes and inverts foot Flexor hallucis longus - ANSWER>>> Flexes hallux, inverts foot Tibialis anterior - ANSWER>>> Dorsiflexes and inverts foot
Extensor digitorum longus (^) - ANSWER>>> Extends toes, dorsiflexes foot Extensor hallucis longus - ANSWER>>> Extends hallux, dorsiflexes foot Fibularis longus - ANSWER>>> Plantar flexes and everts foot Levator scapulae - ANSWER>>> Elevates scapula, abducts and rotates neck Scalenes (anterior, middle, and posterior)
- ANSWER>>>
Flexes and rotates neck, elevates rib 1 and 2 Sternocleidomastoid (^) - ANSWER>>> Rotates and flexes head Sternohyoid - ANSWER>>> Depresses hyoid Sternothyroid - ANSWER>>> Depresses thyroid cartilage Omohyoid (superior and inferior belly) - ANSWER>>> Depresses hyoid Platysma - ANSWER>>> Depresses lower lip, opens jaw Digastric (anterior and posterior belly) (^) - ANSWER>>> Elevates, protracts, retracts hyoid; opens mandible Frontalis - ANSWER>>> Raises eyebrows, draws scalp anteriorly Occipitalis (^) - ANSWER>>> Draws scalp posteriorly Temporalis - ANSWER>>> Closes mandible Masseter - ANSWER>>> Closes mandible Orbicularis oculi - ANSWER>>> Closes eyelid
Serratus anterior - ANSWER>>> Abducts scapula, rotates scapula to elevate shoulder External intercostals - ANSWER>>> Elevates ribs (increases volume in thorax) Internal intercostals - ANSWER>>> Depresses ribs (decreases volume in thorax) The erector spinae (I love spagetti) muscles - ANSWER>>> - Iliocostalis
- Longissimus
- Spinalis Iliocostalis - ANSWER>>> Extends and rotates vertebral column and head Longissimus - ANSWER>>> Extends and rotates vertebral column and head Spinalis - ANSWER>>> Extends and rotates vertebral column and head Rhomboideus major - ANSWER>>> Adducts scapula (draws scapulae together) Rhomboideus minor - ANSWER>>> Adducts scapula (draws scapulae together) Splenius - ANSWER>>> Extends and rotates head Rectus sheath - ANSWER>>> Encloses the abdominal muscles Linea alba - ANSWER>>> Verically divides the right and left side of rectus abdominis Tendinous intersections - ANSWER>>> Small connective tissue bands which run horizontally across rectus abdominis The 5 hip lateral rotator muscles - ANSWER>>> - Piriformis
- Gemellus superior
- Orbturator internus
- Gemellus inferior
- Quadratus femoris
Brachialis - ANSWER>>> Flexes forearms Flexor digitorum profundus - ANSWER>>> Flexes phalanges, flexes hand Galea aponeurotica - ANSWER>>> Tendinous sheet on superior aspect of scull
