The amount of gastric juice produced every day by an average-sized adult is: 12:05 Digestive System The amount of gastric juice produced every day by an average-sized adult is: A) 1-2 liters B) 2-3 liters C) 3-4 liters D) 1-2 gallons E) 2-3 gallons Answer: B Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+