WGU D313 Anatomy and Physiology 2 Digestive System
Practice Test and Assessment Exam (2025/2026)
with Questions and Verified Rationalized Answers A+ Graded
1. Where does intrinsic factor occur?: parietal cell
n n n n n n
2. Which of the following stored feces prior to defecation?: rectum
n n n n n n n n n
3. Which of the following stores and concentrates bile?: duodenum
n n n n n n n n
4. In what order from shortest to longest are the parts of the intestine?: duo-
n n n n n n n n n n n n n
n denum, jejunum, ileum
n n
5. What is the substrate of salivary amylase?: polysaccharides
n n n n n n n
6. Which hormone induces a watery secretion of bicarbonate from the pan-
n n n n n n n n n n
n creas?: secretinn
7. What is the name of the digestive organ in which major absorption of water occ
n n n n n n n n n n n n n n
urs?: large intestine
n n
8. Which substances reach the systemic circulation via lymph postabsorp-
n n n n n n n n
n tion?: lipids
n
9. Where is chemical digestion initiated in the alimentary canal?: oral cavity
n n n n n n n n n n
1n/n40
,10. Which layer of the stomach secretes mucus and is called the mucus m
n n n n n n n n n n n n
embrane?: mucosa n
11. What is the sequence of the digestive process?: ingestion, digestion, absorp-
n n n n n n n n n n
tion, defecation
n n
12. Which enzyme catalyzes the disassociation of carbonic acid into hydrogen an
n n n n n n n n n n
d bicarbonate ions?: carbonic anhydrase
n n n n
13. Which of the following are ways in which carbon dioxide is transported in the
n n n n n n n n n n n n n n
blood?: all of the above n n n n
14. As increasing amounts of carbon dioxide enter the blood, bicarbonate ions beg
n n n n n n n n n n n
ins to accumulate within the red blood cells. As the concentration gradient is esta
n n n n n n n n n n n n n
blished, bicarbonate ions move out of the red blood cells and into the blood plas
n n n n n n n n n n n n n n
ma. The electrical balance between the blood plasma and red blood cells must b
n n n n n n n n n n n n n
e maintained; therefore, as one bicarbonate ion moves into the plasma, so one
n n n n n n n n n n n n n
negatively charged ion moves into a red blood cell from the plasma. Which ion
n n n n n n n n n n n n n n
moves into the blood cell?: chloride
n n n n n
15. Which statement is true about carbohydrates?: they provide glucose that is co
n n n n n n n n n n n
nverted to energy n n
16. Which statement is true about fat? Choose 2 answers: it provides nine cal
n n n n n n n n n n n n
2n/n40
,ories per gram
n n
it produces hormones
n n
17. Which food type is a source of carbohydrates?: vegetables
n n n n n n n n
18. Which element is a macronutrient?: protein
n n n n n
19. Which macronutrient supplies amino acids to the body when the macronu-
n n n n n n n n n n
trient breaks down?: protein
n n n n
3n/n40
, 20. The U.S. Department of Agriculture provides nutrition guidelines through its
n n n n n n n n n n
MyPlate.gov guide. Which section in MyPlate has the highest percentage?-
n n n n n n n n n
: vegetables
n
21. A lack of which macronutrients can cause muscle wasting?: protein
n n n n n n n n n
22. The deficiency of which vitamin causes scurvy?: vitamin C
n n n n n n n n
23. Which fat soluble vitamin is manufactured by the human body by exposure to s
n n n n n n n n n n n n n
unlight?: vitamin D n n
24. What is a function of vitamin A?: aids in maintaining a clear cornea
n n n n n n n n n n n n
25. Deficiencies of which 2 minerals can cause heart arrhythmias?: magne-
n n n n n n n n n
n sium
calcium
26. Which food item is rich in vitamin B1 (Thiamine)?: grains
n n n n n n n n n
27. Which food item is rich in vitamin D?: dairy products
n n n n n n n n n
28. Which disease is caused by the deficiency of vitamin cyanocabalamin?: -
n n n n n n n n n n
pernicious anemia n
29. Which organ is involved in the absorption of micronutrients?: small intes- tine
n n n n n n n n n n n
30. Which foods are a source of water-
n n n n n n
soluble vitamins?: tomatoes eggs
n n n
4n/n40
Practice Test and Assessment Exam (2025/2026)
with Questions and Verified Rationalized Answers A+ Graded
1. Where does intrinsic factor occur?: parietal cell
n n n n n n
2. Which of the following stored feces prior to defecation?: rectum
n n n n n n n n n
3. Which of the following stores and concentrates bile?: duodenum
n n n n n n n n
4. In what order from shortest to longest are the parts of the intestine?: duo-
n n n n n n n n n n n n n
n denum, jejunum, ileum
n n
5. What is the substrate of salivary amylase?: polysaccharides
n n n n n n n
6. Which hormone induces a watery secretion of bicarbonate from the pan-
n n n n n n n n n n
n creas?: secretinn
7. What is the name of the digestive organ in which major absorption of water occ
n n n n n n n n n n n n n n
urs?: large intestine
n n
8. Which substances reach the systemic circulation via lymph postabsorp-
n n n n n n n n
n tion?: lipids
n
9. Where is chemical digestion initiated in the alimentary canal?: oral cavity
n n n n n n n n n n
1n/n40
,10. Which layer of the stomach secretes mucus and is called the mucus m
n n n n n n n n n n n n
embrane?: mucosa n
11. What is the sequence of the digestive process?: ingestion, digestion, absorp-
n n n n n n n n n n
tion, defecation
n n
12. Which enzyme catalyzes the disassociation of carbonic acid into hydrogen an
n n n n n n n n n n
d bicarbonate ions?: carbonic anhydrase
n n n n
13. Which of the following are ways in which carbon dioxide is transported in the
n n n n n n n n n n n n n n
blood?: all of the above n n n n
14. As increasing amounts of carbon dioxide enter the blood, bicarbonate ions beg
n n n n n n n n n n n
ins to accumulate within the red blood cells. As the concentration gradient is esta
n n n n n n n n n n n n n
blished, bicarbonate ions move out of the red blood cells and into the blood plas
n n n n n n n n n n n n n n
ma. The electrical balance between the blood plasma and red blood cells must b
n n n n n n n n n n n n n
e maintained; therefore, as one bicarbonate ion moves into the plasma, so one
n n n n n n n n n n n n n
negatively charged ion moves into a red blood cell from the plasma. Which ion
n n n n n n n n n n n n n n
moves into the blood cell?: chloride
n n n n n
15. Which statement is true about carbohydrates?: they provide glucose that is co
n n n n n n n n n n n
nverted to energy n n
16. Which statement is true about fat? Choose 2 answers: it provides nine cal
n n n n n n n n n n n n
2n/n40
,ories per gram
n n
it produces hormones
n n
17. Which food type is a source of carbohydrates?: vegetables
n n n n n n n n
18. Which element is a macronutrient?: protein
n n n n n
19. Which macronutrient supplies amino acids to the body when the macronu-
n n n n n n n n n n
trient breaks down?: protein
n n n n
3n/n40
, 20. The U.S. Department of Agriculture provides nutrition guidelines through its
n n n n n n n n n n
MyPlate.gov guide. Which section in MyPlate has the highest percentage?-
n n n n n n n n n
: vegetables
n
21. A lack of which macronutrients can cause muscle wasting?: protein
n n n n n n n n n
22. The deficiency of which vitamin causes scurvy?: vitamin C
n n n n n n n n
23. Which fat soluble vitamin is manufactured by the human body by exposure to s
n n n n n n n n n n n n n
unlight?: vitamin D n n
24. What is a function of vitamin A?: aids in maintaining a clear cornea
n n n n n n n n n n n n
25. Deficiencies of which 2 minerals can cause heart arrhythmias?: magne-
n n n n n n n n n
n sium
calcium
26. Which food item is rich in vitamin B1 (Thiamine)?: grains
n n n n n n n n n
27. Which food item is rich in vitamin D?: dairy products
n n n n n n n n n
28. Which disease is caused by the deficiency of vitamin cyanocabalamin?: -
n n n n n n n n n n
pernicious anemia n
29. Which organ is involved in the absorption of micronutrients?: small intes- tine
n n n n n n n n n n n
30. Which foods are a source of water-
n n n n n n
soluble vitamins?: tomatoes eggs
n n n
4n/n40
