1) Which organ is primarily responsible for the mechanical breakdown of food by chewing and forming a bolus? a) Esophagus b) Mouth c) Stomach d) Small intestine 2) Which accessory organ secretes digestive enzymes and bicarbonate to aid chemical digestion in the small intestine? a) Liver b) Gallbladder c) Pancreas d) Spleen 3) Which organ is known as the main site for nutrient absorption? a) Large intestine b) Stomach c) Small intestine d) Esophagus 4) Which structure prevents food from entering the nasal cavity during swallowing? a) Epiglottis b) Uvula and soft palate c) Glottis d) Tonsils 5) Which organ is involved in both mechanical and chemical digestion? a) Esophagus b) Pharynx  c) Stomach d) Large intestine 6) Which organ is primarily responsible for absorbing water and electrolytes? a) Small intestine b) Stomach c) Large intestine d) Mouth 7) Which of the following is NOT part of the alimentary (gastrointestinal) canal? a) Stomach b) Esophagus c) Small intestine d) Liver 8) Which accessory organ produces bile that helps in the emulsification of fats? a) Liver b) Gallbladder c) Pancreas d) Spleen 9) Which process in the small intestine involves rhythmic contractions that mix the chyme with digestive enzymes? a) Peristalsis b) Ingestion c) Absorption d) Segmentation 10) What is the name of the partially digested, semi-liquid mixture of food in the stomach? a) Bolus b) Chyme c) Paste d) Villi 11) Which statement best describes mechanical digestion? a) It only occurs in the mouth. b) It involves the enzymatic breakdown of food molecules. c) It is the physical breakdown of food into smaller pieces. d) It occurs exclusively in the stomach. 12) What is the main role of the tongue in the digestive process? a) Secreting digestive enzymes b) Forming the bolus and facilitating taste c) Absorbing nutrients d) Neutralizing stomach acid 13) Which organ uses strong muscular contractions (churning) to aid in both mechanical and chemical digestion? a) Stomach b) Esophagus c) Small intestine d) Large intestine 14) Which of the following statements is true regarding the initiation of digestion? a) Mechanical digestion only occurs in the stomach. b) Chemical digestion is solely the function of the pancreas. c) Mechanical digestion begins in the mouth and continues in the stomach. d) Chemical digestion does not start until the food reaches the small intestine. 15) Which of the following correctly lists the major components of the alimentary canal? a) Mouth, esophagus, stomach, small intestine, large intestine, anus b) Mouth, liver, pancreas, stomach, large intestine c) Esophagus, gallbladder, stomach, small intestine, large intestine d) Tongue, teeth, esophagus, small intestine, large intestine

Digestive system part 1

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