Instructions

Please read each section/question carefully. Answer questions in complete sentences, and if/when you need to cite outside materials, please use footnotes. All work is to be typed, and may be submitted either by email or in class. This assignment is due no later than midnight TUESDAY AUGUST 23rd. NO LATE PAPERS ACCEPTED

Short Answer:

To which two organ systems does the pharynx belong?

What are the functions of the lower & upper esophageal sphincters?

What is the importance of rugae, surface mucous cells, mucous neck cells, chief cells, parietal cells and G cells in the stomach?

What are the digestive functions of the components of pancreatic juice?

What is the function of bile?

What is the difference between digestion & absorption?

By what routes do absorbed nutrients reach the liver?

Case study 1:

You are eating a peanut butter & honey sandwich on whole wheat bread.

Q1: Starting with the mouth, describe the structures of the gastrointestinal tract in the order the sandwich will pass thru, as well as the distinct digestive enzymes that will be released at each area in an attempt to break down and digest this sandwich. Be sure to indicate the function of each digestive enzyme, and what constituent of the sandwich it will be digesting.

Q2: Indicate where absorption takes place, and describe the cells/ structures responsible for absorbing the nutrients of the sandwich.

Case Study 2:

Sharon & Walter enjoyed a lovely dinner at a Thai restaurant. After dinner they take a long walk and then Walter says he is hungry!

Q1: how can Walter feel hungry again an hour or two after eating Thai food?