What are the physiological implications of a gastric band, gastric sleeve, and gastrointestinal bypass?  

Question 1: What are the physiological implications of a gastric band, gastric sleeve, and gastrointestinal bypass?

Question 2: Describe the difference in the way the system would function if there were a band, sleeve, or bypass. Are there any repercussions of having these interventions in the system? If you think there are, please describe them.