Bios 252 - Exam WITH CORRECT
SOLUTIONS (2026-2027 UPDATED)
GRADED A+
1. arachnoid mater - ANSWER-weblike middle layer of the three
meninges
2. ascending tracts - ANSWER-carry sensory information to the
brain
3. ascending tracts pathways - ANSWER-spinocerebellar,
spinothalamic, dorsal column
4. Broca area function - ANSWER-Generates motor program for
the muscles of the larynx, tongue, cheeks, and lips for
speaking
5. carry motor information from the CNS to effectors - ANSWER-
direct pathway
6. cauda equina - ANSWER-bundle of nerve roots that occupy the
vertebral canal from L2 to S5
7. Cerebellum - ANSWER-controls skeletal muscle movements,
coordinates skeletal muscle contractions, maintains muscle
tone for balance/equilibrium
8. conus medullaris - ANSWER-cord tapers to a point inferior to
lumbosacral enlargement
, 9. conus medullaris - ANSWER-tapered inferior end of spinal cord
10. cranial nerve - abducens - ANSWER-6 - moves eyeball via
extrinsic eye muscle (lateral rectus) - motor
11. cranial nerve - accessory - ANSWER-11 - movement of
head - motor
12. cranial nerve - facial - ANSWER-7 - taste (anterior 2/3 of
tongue), pain, touch, thermal sensation, muscles of facial
expression, secretion of tears/saliva - mixed
13. cranial nerve - glossopharyngeal - ANSWER-9 - taste
(posterior 1/3 of tongue), monitors co2 / o2, monitors BP,
swallowing, saliva secretion - mixed
14. cranial nerve - hypoglossal - ANSWER-12 - speech,
manipulation of food, swallowing - motor
15. cranial nerve - oculomotor - ANSWER-3 - moves eyeball
via extrinsic eye muscles; adjusts lens; constricts pupil - motor
16. cranial nerve - olfactory - ANSWER-1 - smell - sensory
17. cranial nerve - optic - ANSWER-2 - vision - sensory
18. cranial nerve - trigeminal - ANSWER-5 - touch, pain,
thermal sensation, chewing - mixed
SOLUTIONS (2026-2027 UPDATED)
GRADED A+
1. arachnoid mater - ANSWER-weblike middle layer of the three
meninges
2. ascending tracts - ANSWER-carry sensory information to the
brain
3. ascending tracts pathways - ANSWER-spinocerebellar,
spinothalamic, dorsal column
4. Broca area function - ANSWER-Generates motor program for
the muscles of the larynx, tongue, cheeks, and lips for
speaking
5. carry motor information from the CNS to effectors - ANSWER-
direct pathway
6. cauda equina - ANSWER-bundle of nerve roots that occupy the
vertebral canal from L2 to S5
7. Cerebellum - ANSWER-controls skeletal muscle movements,
coordinates skeletal muscle contractions, maintains muscle
tone for balance/equilibrium
8. conus medullaris - ANSWER-cord tapers to a point inferior to
lumbosacral enlargement
, 9. conus medullaris - ANSWER-tapered inferior end of spinal cord
10. cranial nerve - abducens - ANSWER-6 - moves eyeball via
extrinsic eye muscle (lateral rectus) - motor
11. cranial nerve - accessory - ANSWER-11 - movement of
head - motor
12. cranial nerve - facial - ANSWER-7 - taste (anterior 2/3 of
tongue), pain, touch, thermal sensation, muscles of facial
expression, secretion of tears/saliva - mixed
13. cranial nerve - glossopharyngeal - ANSWER-9 - taste
(posterior 1/3 of tongue), monitors co2 / o2, monitors BP,
swallowing, saliva secretion - mixed
14. cranial nerve - hypoglossal - ANSWER-12 - speech,
manipulation of food, swallowing - motor
15. cranial nerve - oculomotor - ANSWER-3 - moves eyeball
via extrinsic eye muscles; adjusts lens; constricts pupil - motor
16. cranial nerve - olfactory - ANSWER-1 - smell - sensory
17. cranial nerve - optic - ANSWER-2 - vision - sensory
18. cranial nerve - trigeminal - ANSWER-5 - touch, pain,
thermal sensation, chewing - mixed
