Portage Biod 151 Module 5 Exam
1. "When piriformis contracts, what action(s) will not occur at the hip? - CORRECT
ANSWER Internal rotation and flexion do not occur"
2."What is the insertion for Teres major? - CORRECT ANSWER Intertubercular groove
of humerus"
3. "Describe how acetylcholine, sodium ions and calcium ions work together to enable a
muscle contraction. - CORRECT ANSWER Acetylcholine is released from a motor
nerve at the neuromuscular junction. Once there, it binds with receptors on the muscle
fiber that cause sodium ions to be released inside the cell. This causes an action
potential which reaches the sarcoplasmic recticulum. The sodium ions cause calcium
ions to be released from to sarcoplasmic recticulum. The calcium ions cause the muscle
contraction. The myosin heads grab the actin and pull them along causing a
contraction."
4. "What facial muscles are innervated by CN VII (facial nerve) - CORRECT ANSWER
Orbicularis oris, orbicularis oculi, buccinator, zygomatic minor/major, frontalis, risorius"
5. "What facial muscles are innervated by the Trigeminal nerve, mandibular branch -
CORRECT ANSWER temporalis and masseter"
6. "What does the sternocleidomastoid muscle do, origin, insertion, innervation -
CORRECT ANSWER Action = neck flexion, turns face to opposite side
Origin = sternal end of clavicle and manubrium
Insertion = mastoid region of skull
Innervation = accessory nerve"
7."semispinalis capitis - CORRECT ANSWER Origin = articular processes of inferior
cervical and transverse processes of superior thoracic vertebrae (T1-T7)
Insertion= occipital bone
Action= extend head, laterally flexes neck to the same side
Innervation= spinal nerve"
8."Splenious Capitis - CORRECT ANSWER origin= spinous process/ligaments
insertion= mastoid process and occipital bone
action= extend head and laterally flexes neck to same side
innervated= cervical spinal nerves"
9. "Longissimus Cervicis - CORRECT ANSWER Origin = transverse processes of
superior thoracic vertebrae
insertion= transverse process of middle and superior cervical vertebrae
action= extend head, laterally flexes neck to same side
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1. "When piriformis contracts, what action(s) will not occur at the hip? - CORRECT
ANSWER Internal rotation and flexion do not occur"
2."What is the insertion for Teres major? - CORRECT ANSWER Intertubercular groove
of humerus"
3. "Describe how acetylcholine, sodium ions and calcium ions work together to enable a
muscle contraction. - CORRECT ANSWER Acetylcholine is released from a motor
nerve at the neuromuscular junction. Once there, it binds with receptors on the muscle
fiber that cause sodium ions to be released inside the cell. This causes an action
potential which reaches the sarcoplasmic recticulum. The sodium ions cause calcium
ions to be released from to sarcoplasmic recticulum. The calcium ions cause the muscle
contraction. The myosin heads grab the actin and pull them along causing a
contraction."
4. "What facial muscles are innervated by CN VII (facial nerve) - CORRECT ANSWER
Orbicularis oris, orbicularis oculi, buccinator, zygomatic minor/major, frontalis, risorius"
5. "What facial muscles are innervated by the Trigeminal nerve, mandibular branch -
CORRECT ANSWER temporalis and masseter"
6. "What does the sternocleidomastoid muscle do, origin, insertion, innervation -
CORRECT ANSWER Action = neck flexion, turns face to opposite side
Origin = sternal end of clavicle and manubrium
Insertion = mastoid region of skull
Innervation = accessory nerve"
7."semispinalis capitis - CORRECT ANSWER Origin = articular processes of inferior
cervical and transverse processes of superior thoracic vertebrae (T1-T7)
Insertion= occipital bone
Action= extend head, laterally flexes neck to the same side
Innervation= spinal nerve"
8."Splenious Capitis - CORRECT ANSWER origin= spinous process/ligaments
insertion= mastoid process and occipital bone
action= extend head and laterally flexes neck to same side
innervated= cervical spinal nerves"
9. "Longissimus Cervicis - CORRECT ANSWER Origin = transverse processes of
superior thoracic vertebrae
insertion= transverse process of middle and superior cervical vertebrae
action= extend head, laterally flexes neck to same side
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