Question 1: Which organ is primarily responsible for nutrient absorption?

Answer: Small intestine

Question 2: True or False: The liver produces bile which is stored in the gallbladder.

Answer: True

Question 3: What is the main function of the stomach in digestion?

Answer: The stomach's main function is to break down food using stomach acid and enzymes.

Question 4: Calculate the time taken for food to pass through the entire digestive system if the average speed is 2 cm per minute and the digestive tract is approximately 900 cm long.

Answer: 450 minutes

Question 5: Match the following terms to their definitions:

Answer: See full answer key

Question 6: Order the following steps in the process of digestion: ingestion, absorption, digestion, elimination.

Answer: See full answer key

Question 7: Fill in the blank: The _____ is responsible for water absorption and formation of feces.

Answer: large intestine

Question 8: Explain the role of the pancreas in digestion.

Answer: The pancreas produces digestive enzymes that help break down carbohydrates, proteins, and fats in the small intestine. It also produces insulin, which helps regulate blood sugar levels.

Question 9: True or False: The esophagus is part of the respiratory system.

Answer: False

Question 10: Describe how the small intestine is adapted for its function of nutrient absorption.

Answer: The small intestine has a large surface area due to villi and microvilli, which increase absorption efficiency. It also has a rich blood supply to transport absorbed nutrients.

Question 11: What is the role of hydrochloric acid in the stomach?

Answer: Hydrochloric acid provides an acidic environment for enzymes to digest food and kills harmful bacteria.

Question 12: Discuss how diet impacts the efficiency of the digestive system.

Answer: A balanced diet with adequate fiber, proteins, and vitamins enhances digestive efficiency. Fiber aids in bowel movement, proteins support enzyme function, and vitamins facilitate metabolic processes. Poor diet can lead to digestive issues like constipation, indigestion, or nutrient deficiencies.