Which of the following is not a trigger for mass movements of the colon?
The gastrocolic reflex
The duodenocolic reflex
Chyme filling the duodenum
Chyme filling the stomach
The colorectal reflex
The Correct Answer is E
A. The gastrocolic reflex: Triggered by food entering the stomach, it stimulates mass movement in the colon.
B. The duodenocolic reflex: Triggered by chyme entering the duodenum, this reflex stimulates colon contractions.
C. Chyme filling the duodenum: This activates the duodenocolic reflex, promoting mass movement.
D. Chyme filling the stomach: This activates the gastrocolic reflex.
E. The colorectal reflex: This reflex is involved in the defecation process-it responds to rectal filling, not in initiating mass movement in the colon. It is not a trigger for mass movement.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is E
Explanation
A. Tongue: The tongue assists in mechanical digestion and swallowing, making it an accessory organ.
B. Liver: The liver produces bile, aiding fat digestion, and is an accessory digestive organ.
C. Pancreas: The pancreas secretes digestive enzymes and bicarbonate, making it a key accessory organ.
D. Salivary glands: These produce saliva, initiating starch digestion-also accessory organs.
E. Spleen: The spleen is part of the lymphatic and immune system, not involved in digestion-not a digestive organ.
Correct Answer is D
Explanation
A. Sodium, potassium, calcium, chloride, and phosphorus: These are micronutrients (minerals).
B. Nucleic acids, carbohydrates, lipids, and proteins: Nucleic acids are not dietary macronutrients.
C. Sodium, potassium, carbohydrates, lipids, and proteins: Sodium and potassium are micronutrients.
D. Carbohydrates, lipids, proteins, and water: These are the true macronutrients, required in large amounts for energy and metabolic function.
E. Carbohydrates, lipids, and proteins, but not water: Water is an essential macronutrient, even though it doesn’t provide calories.
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