Preview Questions (lecture 7)

Preview Questions (lecture 7) - Lecture 7 Digestion...

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Lecture 7: Digestion Questions you should be able to answer after today’s lecture. 1. Upon eating, what processes occur in the mouth? a. The teeth cut rip and grind food. b. The tongue contains the taste buds and shapes the food into a bolus c. The salivary glands secrete .5-2 liters of saliva a day. d. The Saliva contains mucus to lubricate the food and protect the lining of the mouth; amylase, an enzyme that digests starch to maltose, lysozyme, an enzyme that kills bacteria, and bicarbonate/ phosphate buffer to neutralize food acids that would cause tooth decay. 2. Describe the swallowing reflex. a. Allows food to flow into the stomach and not the lungs due to the up and down movement of the epiglottis. 3. How did Spallanzani show that digestion was in part a chemical process? a. He covered the food with metal tubes and ate them. When the food passed through his anus he notices they had been partially digested indicating that mechanical grinding was only part of the digestive process.
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  • Spring '07
  • WAYNE,R.
  • Ivan Pavlov, salivary glands, chief cells, Beaumont, cells secrete pepsin

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