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WGU D313 ANATOMY AND PHYSIOLOGY 2 DIGESTIVE SYSTEM EXAM QUESTIONS | FREQUENTLY TESTED QUESTIONS | VERIFIED SOLUTIONS (100% CORRECT) | 2026–2027

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Ace your WGU D313 Anatomy and Physiology 2 Digestive System assessment with this comprehensive study guide featuring practice questions and verified answers designed to support effective exam preparation. This resource covers the essential digestive system concepts tested in WGU D313, including the anatomy and physiology of the gastrointestinal tract, digestion and absorption of nutrients, oral cavity, esophagus, stomach, small and large intestines, liver, gallbladder, pancreas, digestive enzymes, metabolism, gastrointestinal hormones, nutrient absorption, acid-base balance, common digestive disorders, and homeostatic regulation. Ideal for Western Governors University (WGU) nursing and health science students preparing for quizzes, Objective Assessments (OAs), and final exams, this organized study material reinforces essential anatomy and physiology concepts, strengthens clinical understanding, improves exam readiness, and maximizes your chances of success in WGU D313 Anatomy and Physiology 2 during the 2026–2027 academic year.

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WGU - D313 - Anatomy and Physiology 2 Digestive System Practice Test

In what order from shortest to longest are the parts of duodenum, jejunum, ileum
the intestine?
3 multiple choice options



What is the substrate of salivary amylase? polysaccharides

3 multiple choice options




Which hormone induces a watery secretion of secretin
bicarbonate from the pancreas?
3 multiple choice options



What is the name of the digestive organ in which major large intestine
absorption of water occurs?
3 multiple choice options



Which substances reach the systemic circulation via lipids
lymph postabsorption?
3 multiple choice options




Where is chemical digestion initiated in the alimentary oral cavity
canal?
3 multiple choice options



Which layer of the stomach secretes mucus and is mucosa
called the mucus membrane? 3 multiple choice options



What is the sequence of the digestive process? ingestion, digestion, absorption, defecation

3 multiple choice options



Which enzyme catalyzes the disassociation of carbonic carbonic anhydrase
acid into hydrogen and bicarbonate ions?
3 multiple choice options




Which of the following are ways in which carbon all of the above
dioxide is transported in the blood?
3 multiple choice options




As increasing amounts of carbon dioxide enter the chloride
blood, bicarbonate ions begins to accumulate within
3 multiple choice options
the red blood cells. As the concentration gradient is
established, bicarbonate ions move out of the red
blood cells and into the blood plasma. The electrical
balance between the blood plasma and red blood
cells must be maintained; therefore, as one bicarbonate
ion moves into the plasma, so one negatively charged
ion moves into a red blood cell from the plasma. Which
ion moves into the blood cell?

, WGU - D313 - Anatomy and Physiology 2 Digestive System Practice Test
Which statement is true about carbohydrates? they provide glucose that is converted to energy

2 multiple choice options




Which statement is true about fat? Choose 2 answers it provides nine calories per gram
it produces hormones

3 multiple choice options




Which food type is a source of carbohydrates? vegetables

3 multiple choice options



Which element is a macronutrient? protein

3 multiple choice options



Which macronutrient supplies amino acids to the body protein
when the macronutrient breaks down?
3 multiple choice options




The U.S. Department of Agriculture provides nutrition vegetables
guidelines through its MyPlate.gov guide. Which section
3 multiple choice options
in MyPlate has the highest percentage?


A lack of which macronutrients can cause muscle protein
wasting?
2 multiple choice options




The deficiency of which vitamin causes scurvy? vitamin C

3 multiple choice options



Which fat soluble vitamin is manufactured by the human vitamin D
body by exposure to sunlight? 3 multiple choice options




What is a function of vitamin A? aids in maintaining a clear cornea

3 multiple choice options




Deficiencies of which 2 minerals can cause heart magnesium
arrhythmias? calcium

3 multiple choice options




Which food item is rich in vitamin B1 (Thiamine)? grains

3 multiple choice options




Which food item is rich in vitamin D? dairy products

3 multiple choice options

, WGU - D313 - Anatomy and Physiology 2 Digestive System Practice Test
Which disease is caused by the deficiency of vitamin pernicious anemia
cyanocabalamin?
3 multiple choice options




Which organ is involved in the absorption of small intestine
micronutrients?
3 multiple choice options



Which foods are a source of water-soluble vitamins? tomatoes
eggs

3 multiple choice options




What is the final step in the digestion process? defecation

3 multiple choice options



What is the function of accessory organs? break down nutrients

3 multiple choice options



Which structure is part of the alimentary canal? stomach

3 multiple choice options



Which digestive function is accomplished by the teeth? mechanical digestion

3 multiple choice options



What is the first step in the digestion process? ingestion

3 multiple choice options



Which term defines assimilation of nutrients into the absorption
blood and lymph? 3 multiple choice options



Which salivary gland lies within the cheeks? parotid

3 multiple choice options




What is the main component of saliva? water

3 multiple choice options



Which structure forms the anterior border of the oral lips
cavity?
3 multiple choice options

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