During the Miocene, when temperatures became warm at higher latitudes, monkeys and apes radiated from Africa into Eurasia. What prevented primates from reappearing in North America during this time?
What will be an ideal response?
Even though there were primates in South America during the Miocene, North and South America were separated by a seaway that primates could not cross. The world was not so warm that primates could migrate to North America by way of the contact between Asia and Alaska.
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Which of the following descriptions best matches the term cholecystokinin (CCK)?
A) where pancreatic juice and bile enter duodenum B) carries absorbed sugars and amino acids C) stimulates pancreas to secrete bicarbonate-rich fluid D) causes gallbladder to contract E) stimulates gastric secretion
The most common neurotransmitter is ________.
Fill in the blank(s) with the appropriate word(s).
A 9-year-old boy was admitted to the emergency department complaining of nausea, vomiting, fever, and loss of appetite. On examination, he was found to have tender- ness and pain on the right lower quadrant. Based on signs and symptoms, the diagnosis of acute appendicitis was made. During an appendectomy performed at McBurney's point, which of the following structures is most likely to be injured?
(A) Deep circumflex femoral artery (B) Inferior epigastric artery (C) Iliohypogastric nerve (D) Genitofemoral nerve (E) Spermatic cord
The most common type of cartilage, named for its glassy appearance, is
A. reticular cartilage. B. areolar cartilage. C. hyaline cartilage. D. fibrocartilage. E. elastic cartilage.