Exam 3: Digestion: From Meals to Molecules

Water, minerals, and nitrogen-containing by-products of protein digestion are filtered out of the blood by the lungs.

Discuss how various other organ systems work with the digestive system to deliver nutrients and eliminate wastes.

Bicarbonate neutralizes the acid in chyme, which allows ___ from the pancreas and small intestine to function.

Explain how the structure of the small intestine relates to its function in absorption. Include a description of brush border, villi and microvilli, lacteal, and capillary.

Proteins are broken down into _____ whereas fats are digested mostly into _____.

Cellular respiration uses oxygen to convert glucose, fatty acids, and amino acids into carbon dioxide, water, and ATP.

_____ lubricates, moistens, and protects the cells within the mucosa.

Cellular respiration converts all of the substrates into energy EXCEPT:

The slow movement of food stuff through the _____ favors the growth of microflora.

The gastric pits produce each of the following EXCEPT

Trypsin and chymotrypsin are lipases.

The end results of cellular respiration include all of the following EXCEPT

Chewing food begins mechanical digestion and breaks up fiber.

When the epiglottis doesn't move correctly, it can lead to

The time it takes food to travel the length of the GI tract is called the transit time.

The lymphatic system is a circulatory system.

Which of the following substances is not absorbed by the human body?

During swallowing, the air passages are blocked by a flap of tissue called the pharynx.

Collectively, the microvilli are referred as the brush border.

Explain how the nutritional composition and size of the meal influence transit time.