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BIO 140 Human Biology I - Questions and Solutions

Accessory Organs in Digestion - Solutions

Review Questions

1. Which of these statements about bile is true?

  1. About 500 mL is secreted daily.
  2. Its main function is the denaturation of proteins.
  3. It is synthesized in the gallbladder.
  4. Bile salts are recycled.

2. Pancreatic juice ________.

  1. deactivates bile.
  2. is secreted by pancreatic islet cells.
  3. buffers chyme.
  4. is released into the cystic duct.

 

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Critical Thinking Questions

1. Why does the pancreas secrete some enzymes in their inactive forms, and where are these enzymes activated?

Solution: The pancreas secretes protein-digesting enzymes in their inactive forms. If secreted in their active forms, they would self-digest the pancreas. These enzymes are activated in the duodenum.

2. Describe the location of hepatocytes in the liver and how this arrangement enhances their function.

Solution: The hepatocytes are the main cell type of the liver. They process, store, and release nutrients into the blood. Radiating out from the central vein, they are tightly packed around the hepatic sinusoids, allowing the hepatocytes easy access to the blood flowing through the sinusoids.

 

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OpenStax, Accessory Organs in Digestion: The Liver, Pancreas, and Gallbladder. OpenStax CNX. Jun 4, 2013 http://cnx.org/contents/7ac81fac-f96f-438b-8a3b-a6866fcc4969@3. © Jun 4, 2013 OpenStax. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution License 3.0 license.