The resting membrane potential of a typical nerve cell is ____ mV
a. -60
b. +70
c. -90
d. -50
e. -70
E
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The central nervous system (CNS) consists of
A. spinal and cranial nerves. B. the brain and cranial nerves. C. the brain and spinal cord. D. nerves in the upper and lower limbs.
A 25-year-old medical student in good health develops severe pain in the area around her umbilicus. She com- plains of nausea and is taken to the emergency depart- ment. While there, the pain becomes more localized in the lower right quadrant of her abdomen and the physician diagnoses appendicitis. Which of the following nerves per- ceived pain in the area around the umbilicus and most likely carried the pain sensations to the central nervous system?
A. Inferior hypogastric nerves B. Lesser splanchnic nerves C. Pudendal nerves D. Superior hypogastric nerves E. Vagus nerves
Which of the following is false regarding sleep?
A. REM sleep is important for memory processing and consolidation. B. During REM sleep, the brain uses as much oxygen as when the individual is awake. C. The longest bouts of REM sleep occur early in the night, with shorter REM periods toward the morning. D. Different stages of non-REM sleep are characterized by different brain waves.
The structure in the pharynx which prevents food from entering the larynx is the ___.
a) cricoid cartilage b) thyroid cartilage c) epiglottis d) glottis