BIOS 252 Lab Practicum
Anterior Scalene - 🧠 ANSWER ✔✔Origin: Anterior Tubercles of the
transverse processes of C3,C4,C5,C6
Insertion:1st rib
Action: Laterally flexes neck and lifts 1st rib
Innervation: (Cervical Spinal Nerves)
sarcomere structure - 🧠 ANSWER ✔✔
Troponin-Tropomyosin Complex - 🧠 ANSWER ✔✔
Triad - 🧠 ANSWER ✔✔
,Neuromuscular Junction - 🧠 ANSWER ✔✔point of contact between a motor
neuron and a skeletal muscle cell
Mucle histology - 🧠 ANSWER ✔✔
Occipitofrontalis - 🧠 ANSWER ✔✔Action: raises eyebrows and wrinkles
forehead; moves scalp; Innervation: Fascial (VII) nerve
Obicularis Oris - 🧠 ANSWER ✔✔Origin: Muscle fibers surronding the
opening of the mouth
Insertion: Skin at the corner of the mouth
Action: closes and protrudes lips (kissing muscle) Innervation: Fascial
Nerve (VII)
Zygomaticus Major - 🧠 ANSWER ✔✔Origin: Zygomatic Bone
Insertion: SKin at angle of mouth
Action: retracts and elevates corner of mouth(SMiling) Innervation: (Fascial
(VII) Nerve)
Zygomaticus Minor - 🧠 ANSWER ✔✔Origin: Zygomatic Bone
Insertion: Upper Lip
,Action: retracts and elevates upper lip Expose Teeth: Innervation: Facial
Nerve (VII)
Orbicularis Oculi - 🧠 ANSWER ✔✔Origin: Medial wall of orbit
Insertion: Circular path around orbit
Action: Closes eyelids; used in blinking, winking, and squinting;
Innervation: Facial Nerve VII
corrugator Supercillii - 🧠 ANSWER ✔✔Origin: Frontal bone
Insertion: Skin of eyebrow
Action: Draws eyebrows together; wrinkles forehead: Frowning Fascial
Nerve (VII)
superior rectus - 🧠 ANSWER ✔✔Origin: Common tendinous ring
Insertion: Superior central part of eyeball
Action: elevates eye and turns it medially
Innervation: (oculomotor III)
inferior Rectus - 🧠 ANSWER ✔✔Origin:Common tendinous ring
Insertion: Inferrior and central part of eyeball
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
, Action: depresses eye and turns it medially
Innervation:(oculomotor III)
lateral rectus - 🧠 ANSWER ✔✔moves eye laterally (abducens VI)
medical rectus - 🧠 ANSWER ✔✔Origin: Common tendinous ring
Insertion: Medical side of the eyeball
Action: moves eye medially
Innervation: (Occulomotor III)
superior Oblique - 🧠 ANSWER ✔✔Origin: Sphenoid bone; superior and
medial to common tendinous ring in the orbit
Insertion: Attaches to tendon that passes through the trochlea
Action: moves eye inferiorly and laterally
Innervation: (Trochlear IV)
inferior oblique - 🧠 ANSWER ✔✔Origin: Maxilla in the floor of orbit
Insertion: Eyeballs between inferior and lateral recti
Action: rotates the eye upward and away from the midline
Anterior Scalene - 🧠 ANSWER ✔✔Origin: Anterior Tubercles of the
transverse processes of C3,C4,C5,C6
Insertion:1st rib
Action: Laterally flexes neck and lifts 1st rib
Innervation: (Cervical Spinal Nerves)
sarcomere structure - 🧠 ANSWER ✔✔
Troponin-Tropomyosin Complex - 🧠 ANSWER ✔✔
Triad - 🧠 ANSWER ✔✔
,Neuromuscular Junction - 🧠 ANSWER ✔✔point of contact between a motor
neuron and a skeletal muscle cell
Mucle histology - 🧠 ANSWER ✔✔
Occipitofrontalis - 🧠 ANSWER ✔✔Action: raises eyebrows and wrinkles
forehead; moves scalp; Innervation: Fascial (VII) nerve
Obicularis Oris - 🧠 ANSWER ✔✔Origin: Muscle fibers surronding the
opening of the mouth
Insertion: Skin at the corner of the mouth
Action: closes and protrudes lips (kissing muscle) Innervation: Fascial
Nerve (VII)
Zygomaticus Major - 🧠 ANSWER ✔✔Origin: Zygomatic Bone
Insertion: SKin at angle of mouth
Action: retracts and elevates corner of mouth(SMiling) Innervation: (Fascial
(VII) Nerve)
Zygomaticus Minor - 🧠 ANSWER ✔✔Origin: Zygomatic Bone
Insertion: Upper Lip
,Action: retracts and elevates upper lip Expose Teeth: Innervation: Facial
Nerve (VII)
Orbicularis Oculi - 🧠 ANSWER ✔✔Origin: Medial wall of orbit
Insertion: Circular path around orbit
Action: Closes eyelids; used in blinking, winking, and squinting;
Innervation: Facial Nerve VII
corrugator Supercillii - 🧠 ANSWER ✔✔Origin: Frontal bone
Insertion: Skin of eyebrow
Action: Draws eyebrows together; wrinkles forehead: Frowning Fascial
Nerve (VII)
superior rectus - 🧠 ANSWER ✔✔Origin: Common tendinous ring
Insertion: Superior central part of eyeball
Action: elevates eye and turns it medially
Innervation: (oculomotor III)
inferior Rectus - 🧠 ANSWER ✔✔Origin:Common tendinous ring
Insertion: Inferrior and central part of eyeball
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
, Action: depresses eye and turns it medially
Innervation:(oculomotor III)
lateral rectus - 🧠 ANSWER ✔✔moves eye laterally (abducens VI)
medical rectus - 🧠 ANSWER ✔✔Origin: Common tendinous ring
Insertion: Medical side of the eyeball
Action: moves eye medially
Innervation: (Occulomotor III)
superior Oblique - 🧠 ANSWER ✔✔Origin: Sphenoid bone; superior and
medial to common tendinous ring in the orbit
Insertion: Attaches to tendon that passes through the trochlea
Action: moves eye inferiorly and laterally
Innervation: (Trochlear IV)
inferior oblique - 🧠 ANSWER ✔✔Origin: Maxilla in the floor of orbit
Insertion: Eyeballs between inferior and lateral recti
Action: rotates the eye upward and away from the midline
