An obese patient undergoes gastric bypass surgery which alters gut hormone secretion. Which mechanism explains why they experience increased satiety with smaller food portions?

💡 Explanation

Gastric bypass leads to increased secretion of GLP-1 (glucagon-like peptide 1) because the surgery exposes the distal bowel to nutrients earlier, therefore GLP-1 slows gastric emptying and promotes satiety. This leads to reduced appetite rather than changes in vagal nerve stimulation or leptin sensitivity.

• If a patient experiences chronically elevated blood pressure due to arterial stiffening, which consequence is most likely to develop over years?
• What causes reduced airflow when an asthmatic patient inhales allergens?
• Why does impaired hypothalamic function cause hypothermia despite normal shivering reflexes in a patient?
• If a drug blocks the reuptake transporter for dopamine in the synapse of the nigrostriatal pathway, which consequence follows for dopamine signaling?
• Why does supertasting (heightened taste sensitivity) commonly result in decreased consumption of cruciferous vegetables?
• Why does isometric muscle contraction, during a plank exercise, generate less skeletal movement than isotonic contractions under similar muscle tension?