A 53-year-old man with a recurrent history of ulcer disease associated with diarrhea and a strong family history of duodenal ulcer disease is suspected of having Zollinger-Ellison syndrome (gastrinoma). Secretin (2 units/kg) was given as a rapid intravenous injection to test for gastrinoma. Which of the following results would support the existence of gastrinoma following secretin administration?

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#Question id: 19220

#Unit 12. Applied Biology

Opines are unique and unusual condensation products of either an amino acid and a keto acid or sugar. The condensation product of arginine and pyruvic acid is called 

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#Question id: 2948

#Unit 2. Cellular Organization

A cell that is entering the M phase of the cell cycle is:

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#Question id: 2989

#Unit 2. Cellular Organization

Use the figure to answer the question below.

In the figure, G1 is represented by which numbered part(s) of the cycle?

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#Question id: 12060

#Unit 7. System Physiology – Animal

 Eating a meal leads to a large increase in gastric acid secretion that peaks within about 5 min and returns to normal about 4 hr after a meal is taken. How long after a meal does the pH of the gastric contents reach its lowest level (in hours)?

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#Question id: 4594

#Unit 11. Evolution and Behavior

Which one of the following observations did Darwin first make during his discovery of evolution?