A hummingbird species feeds almost exclusively on the nectar of Helicon. flowers. Each hummer has a circuit that takes it from one plant to another, with the bird showing up regularly at a given flower after a set period. It could be 20 minutes more or lean do the mundtrip. […]

A 68-year-old man with chronic renal failure was in the hospital in serious condition recovering from a heart attack. He had just undergone “balloon angioplasty” to redilate his left coronary artery, and was thus on an “npo” diet (i.e. he was not allowed to have food or drink by mouth). […]

Ryan is a 30-year-old man who recently made the decision to talk with his doctor about a somewhat sensitive issue. He just celebrated his third anniversary with his wife, and they have started talking seriously about having kids. Though he knows this is a big step, Ryan has always wanted […]

Metabolism and Homeostasis 1. What is metabolism? 2. What is the difference between catabolism and anabolism? 3. What is the homeostasis? What are the sensors, effectors and controllers of homeostasis? 4. How do antagonistic mechanisms manage homeostatic regulation? 5. What is an instance of negative feedback of the homeostatic regulation? […]