Which of the following statements regarding the migrating motor complex is true?
A. It allows a bolus to move down the esophagus.
B. It churns and mixes a bolus with gastric juices.
C. It milks the chyme toward the colon.
D. It propels pancreatic juice down the pancreatic duct.
E. It churns and mixes residue in the descending colon.
Answer: C
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The arachnoid villi receive blood and cerebrospinal fluid.
Answer the following statement true (T) or false (F)
If the lens flattened with age, what type of vision would become easier over time for this individual?
A. No light will enter the eye and blindness will result B. Both near and distance vision are fine, but changing back and forth between them becomes difficult C. Distance vision (e.g., reading a street sign) D. Near vision (e.g., reading a book) E. Both near and distance vision are compromised
A unique aspect of hematopoiesis is that
A) white blood cell production always results in the same proportion of leukocytes. B) lymphocytes never die. C) white blood cell development varies with the specific needs of the body. D) neutrophils direct all development from the lymph nodes.
Which cranial nerve is responsible for transmitting information about sounds and head position and movement to the brain?
A) vestibulocochlear nerve (CN VIII) B) optic nerve (CN II) C) olfactory nerve (CN I) D) facial nerve (CN VII)