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Bio 254 Digestive System Questions And Answers Rated A+
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Bio 254 Digestive System Questions And Answers Rated A+ Why do vertebrates require a digestive system ANS They are particulate feeders, meaning that the large chunks of ingested material must be processed to release energy and nutrients What is the function of the digestive system ANS To rece...

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  • September 5, 2024
  • 9
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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Bio 254 Digestive System Questions And Answers
Rated A+
Why do vertebrates require a digestive system ANS They are particulate feeders, meaning that the large chunks
of ingested material must be processed to release energy and nutrients



What is the function of the digestive system ANS To receive and temporarily store, to break down food and
further reduce it chemically, to absorb digested products, to eliminate undigested waste



How does food move through the gut ANS Through peristaltic smooth muscle contractions



Structure of the esophagus ANS Highly distensible organ lined with epithelium consisting of stratified squamous
cells that may be cornified



Function of the esophagus ANS Receives food from the oral cavity and pharynx



What does the esophagus secrete ANS Mucus



Function of stomach ANS Stores food and participates in the chemical and physical digestion process



Why must the food be temporarily stored in the stomach? ANS Most vertebrates are intermediate feeders and
take in food faster than it can be digested



Describe the structure of the stomach ANS Lined with glandular epithelium and can be divided into the cardiac,
pyloric, and fundic regions depending on the fine structures and secretions



What are the secretions of the stomach ANS Epithelium secretes HCl and a pepsin precursor, which is activated
in the HCl and starts the digestion of proteins



Compare the stomachs of vertebrates that feed on fluids to those that feed on solids ANS Fluid - reduced
stomachs



Describe the stomach structure of herbivores ANS Greatly enlarged and frequently multichambered esophagus
and stomach

, What are the 2 sphincters of the stomach and what do they do? ANS Cardiac (top) controls movement of food
into the stomach

Pyloric (bottom) controls movement of chyme into the small intestine



What are the portions of the small intestine ANS Duodenum

ileum

jejunum



What is the function of the duodenum ANS Receives bile and pancreatic enzymes



What is the function of the ileum ANS Continues the chemical digestion of the food and absorbs nutrients



Define caecum ANS Fermented chambers for cellulose digesting microorganisms found at the junction of the
large and small intestine



Where is the colon most frequently found ANS In tetrapods



What is the function of the colon ANS Reabsorption of water from the remaining digested food



Why do aquatic vertebrates not have a colon? ANS Less need for reabsorbing water



What is the function of the rectum ANS Stores the feces until eliminated



What are the digestive glands ANS The liver and pancreas



What is the largest gland in the body ANS the liver



What is the function of the liver ANS processing of absorbed nutrients

detoxification of harmful substances

production of bile

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