BIOS 252 FINAL PAPER EXAM PREP QUESTIONS AND ANSWERS GUARANTEED TO PASS

BIOS 252 FINAL PAPER EXAM PREP
QUESTIONS AND ANSWERS GUARANTEED
TO PASS

◉ What parts of the gray matter tissue of the spinal cord are
responsible for which functions?
Answer: Anterior horn: somatic motor neurons, Posterior horn: all
sensory information, Lateral horn: autonomic system both
sympathetic (T1-L2/L3) and parasympathetic (brain stem, S2-S4)


◉ What are the cranial nerves and their functions?
Answer: CNI: Sensory, Smell
CN II: Sensory, Sight
CN III: Motor, Moving eyes
CN IV: Motor, Moving eyes
CN V: Both, Facial feeling and chewing
CN VI: Motor, Moving eyes
CN VII: Both, Facial expression
CN VIII: Sensory, Hearing and Balance
CN IX: Both, Salivary gland innervation, swallowing, taste on
posterior 1/3 of tongue

, CN X: Both, Speaking, tasting with epiglottis, cardiovascular
depression, defecation/urination
CN XI: Motor, Shoulder elevation and depression
CN XII: Motor, Tongue movement


◉ What is the resting membrane potential?
Answer: -70mV, cell is more negative due to proteins and Potassium
(K) inside the cell


◉ What is depolarization?
Answer: Sodium (Na) rushes into the cell, making it more positive


◉ What is repolarization?
Answer: Potassium (K) leaves the cell


◉ What is hyperpolarization?
Answer: Too much Potassium (K) leaves the cell


◉ What is an EPSP?
Answer: Graded potential leads to membrane becoming LESS
negative, leading to an action potential if cell membrane reaches -
55mV