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SOPHIA Human Biology
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The digestive system can be thought of as a long tube with how many openings? a.) 3 b.) 1 c.) 4 d.) 2 Question 2 Which layer of the digestive tract secretes a fluid that red... uces friction with other organs? a.) Mucosa b.) Serosa c.) Lumen d.) Smooth muscle Question 3 This study source was downloaded by 100000830772748 from CourseHero.com on 10-15-2021 09:30:17 GMT -05:00 https://www.coursehero.com/file/75969270/Human-Biology-Unit-5-Challenge-4docx/ This study resource was shared via CourseHero.com Which of the following is an agent of mechanical digestion in the mouth? a.) Salivary amylase b.) Teeth c.) Saliva d.) Peristalsis Question 4 What is the cause of heartburn? [Show More]
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