Which of the following statements concerning the brainstem is true?
A. The brainstem consists of the medulla, pons, and cerebellum.
B. All twelve cranial nerves enter or exit from the brainstem.
C. The brainstem is a relay for sensory input only.
D. The brainstem is responsible for higher level thinking skills.
E. Damage to the brainstem is usually fatal.
Answer: E
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Why is there variation in skin color among modern humans?
A. People have different numbers of melanocytes. B. People have a different distribution of carotene in their skin. C. People have a different distribution of melanin in their epidermis. D. People are exposed to different chemicals over their lifetime. E. People have different hemoglobin in vessels close to their skin.
The foramen of Magendie drains the fourth ventricle into the ____________________.
Fill in the blank(s) with the appropriate word(s).
The space bounded by the labia minora is the
A) fornix. B) vestibule. C) hymen. D) clitoris. E) isthmus.
Joints of the upper limb are more mobile, whereas joints of the lower limb are more stable.
Answer the following statement true (T) or false (F)