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16 Questions

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Human Nutrition: Digestive System Quiz

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Questions and Answers

What is the primary function of the digestive system?

Breaking down foods into nutrients for absorption (correct)

Excreting waste from the body

Absorption of nutrients by the cells of the small intestine

Transporting nutrients through the blood or lymph

Which organs are the principal organs of the gastrointestinal tract (GIT)?

Stomach and intestines (correct)

Liver and pancreas

Mouth and large intestine

Esophagus and rectum

What must be done to foods in the digestion process before absorption?

Suspended in enough liquid

Broken down into small particles (correct)

Excretion of the remaining waste

Transported through the blood

Where does the process of digestion begin?

Mouth Signup and view all the answers

What is the inner space within the gastrointestinal tract called?

Lumen Signup and view all the answers

What is the function of absorption in the digestive system?

Uptake of nutrients by the cells of the small intestine Signup and view all the answers

What is the purpose of the epiglottis during the process of swallowing?

To close off the airway and prevent choking Signup and view all the answers

Which body part provides taste sensations and moves food around the mouth?

Tongue Signup and view all the answers

What is the function of bile in the digestive process?

To disperse fats in watery solutions Signup and view all the answers

Which segment of the small intestine is responsible for beginning the digestion of macronutrients?

Duodenum Signup and view all the answers

What is the primary role of the liver in the digestive system?

Continuous production of bile Signup and view all the answers

Which structure ensures that food proceeds forward and doesn’t slip back into the esophagus?

Esophageal sphincter Signup and view all the answers

What is contained in gastric juice that aids primarily in protein digestion?

Enzymes, water, and hydrochloric acid Signup and view all the answers

What is the function of the pyloric sphincter?

To release chyme into the small intestine Signup and view all the answers

What happens to fluids and undigested materials as they enter the large intestine?

They are withdrawn by the colon, leaving semisolid waste Signup and view all the answers

What is the composition of cellular membranes according to the fluid mosaic model?

50% lipids, 50% proteins, containing cholesterol and phospholipid bilayer Signup and view all the answers