7 Digestion

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Week 7 Digestion Lecture Study Guide

Based on information found in the lecture folder or other sources, answer the following questions.

1. What is digestion?

Digestion is the mechanical and chemical breakdown of food into usable molecules

2. List some other names of the digestive tract.

Alimentary Canal (GI Tract)

3. Explain where and how the mechanical breakdown of food occurs.

Teeth begin digestion mechanically, Chewing (“mastication”) breaks apart food, 2 sets of teeth, and the teeth are, Incisors for cutting, Canines “fangs” for tearing, and Premolars and molars for grinding

4. How does food move through the digestive tract?

Movement through the tube which is by wavelike motion called peristalsis

5. What is released from the gall bladder when food is in the duodenum?

Cholecystokinin

6. The organs of the digestive tract form a continuous tube from mouth to anus. List the organs of the tract including specific regions of the small and large intestine, from proximal to distal in the blanks…

Mouth -> pharynx________ -> _______esophagus_________ -> __________Stomach_______ -> small intestine ->

__________ Duodenum______ -> ____ Jejunum_____________ -> ____________ Ilium _______ -> large intestine: cecum,

appendix, -> ________ ascending colon_____________ -> _________ transverse colon____________ -> ___ descending colon_______________ ->

_____ Sigmoidal colon_______________ -> ___ involuntary sphincter__________________ -> ____ voluntary sphincter_______________ -> anus

7. Fill in the chart.

|Organ |Function |Secretes |Helps to digest what food | | | | |type (carb, prot,fat)? | |Mouth |Chewing breaks the food into|Saliva |starches to sugar | | |pieces that are more easily | | | | |digested, while saliva mixes| | | | |with food to begin the | | | | |process of breaking it down | | | | |into a form your body can | | | | |absorb and use. | | | |Esophagus |the esophagus receives food |NA | | | |from your mouth when you | | | | |swallow. By means of a | | | | |series of muscular | | | | |contractions called | | | | |peristalsis, the esophagus | | | | |delivers food to your | | | | |stomach. | | | |Stomach |The stomach is a hollow |secretes gastric juices |protein digestion | | |organ, or "container," that |(pepsin, hydrochloric acid) | | | |holds food while it is being|which digest proteins and | | |...
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