EXSC 224 LAB FINAL QUESTIONS + ANSWERS
1. The forms myelination in the CNS, and the forms myelination
in the PNS: Oligodendrocytes and Schwann cells
2. Which cells produce cerebrospinal fluid?: ependymal cells
3. Identify the posterior horn/gray matter.: #11
4. The brachial plexus is made up of what nerves that innervate the arm
and hand?: musculocutaneous, axillary, median, radial, ulnar
5. 5. The lumbosacral plexus originates (roots) from which spinal nerves?: Lumbar:
T12-L4, Sacral: L4-S4
6. Identify the highlighted nerve.: The tibial nerve
7. Identify the highlighted nerve.: Axillary nerve
8. Identify the highlighted nerve.: Ulnar nerve
9. Identify the highlighted area.: Arbor vitae/cerebellum
,10. Identify the highlighted area.: medulla oblongata
11. Identify the highlighted area.: hypothalamus
, 12. hypoglossal nerve: (CN 12) motor nerves, control speech and swallowing
13. Oculomotor nerve: (CN 3), motor nerve, adapt lens in eye for focus, pupil size regulation for light intake
14. optic nerve: (CN 2), sensory nerve, sight
15. Accessory nerve: (CN 11), motor nerve, controls sternocleidomastoid and trapezius function, shoulder and
neck movement
16. Trigeminal nerves: (CN 5), sensory and motor nerves, largest nerves, control facial movement and
massification; 3 branches: Ophthalmic (innervates eyelids, lacrimal glands), Maxillary (only SENSORY, face sensations
from top of teeth to eyes), Mandibular (chewing)
17. Vagus nerve: (CN 10) both sensory and motor, parasympathetic activity
18. What is the role of the limbic system?: motivation, emotion, learning, and memory
19. Identify the cingulate gyrus:
1. The forms myelination in the CNS, and the forms myelination
in the PNS: Oligodendrocytes and Schwann cells
2. Which cells produce cerebrospinal fluid?: ependymal cells
3. Identify the posterior horn/gray matter.: #11
4. The brachial plexus is made up of what nerves that innervate the arm
and hand?: musculocutaneous, axillary, median, radial, ulnar
5. 5. The lumbosacral plexus originates (roots) from which spinal nerves?: Lumbar:
T12-L4, Sacral: L4-S4
6. Identify the highlighted nerve.: The tibial nerve
7. Identify the highlighted nerve.: Axillary nerve
8. Identify the highlighted nerve.: Ulnar nerve
9. Identify the highlighted area.: Arbor vitae/cerebellum
,10. Identify the highlighted area.: medulla oblongata
11. Identify the highlighted area.: hypothalamus
, 12. hypoglossal nerve: (CN 12) motor nerves, control speech and swallowing
13. Oculomotor nerve: (CN 3), motor nerve, adapt lens in eye for focus, pupil size regulation for light intake
14. optic nerve: (CN 2), sensory nerve, sight
15. Accessory nerve: (CN 11), motor nerve, controls sternocleidomastoid and trapezius function, shoulder and
neck movement
16. Trigeminal nerves: (CN 5), sensory and motor nerves, largest nerves, control facial movement and
massification; 3 branches: Ophthalmic (innervates eyelids, lacrimal glands), Maxillary (only SENSORY, face sensations
from top of teeth to eyes), Mandibular (chewing)
17. Vagus nerve: (CN 10) both sensory and motor, parasympathetic activity
18. What is the role of the limbic system?: motivation, emotion, learning, and memory
19. Identify the cingulate gyrus:
