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- The body’s thermostat is located in the ___________ . homeostatic receptor hypothalamus medulla vasodilation centerA person is declared to be dead upon the irreversible ceasing of spontaneous body functions: brain activity, or blood circulation and respiration. However, only about 1% of a persons cells have to die in order for all of these things to happen. How can someone be dead when 99% of his or her cells are still alive?50% of the population has which body habitus? a. Hypersthenic b. Hyposthenic c. Asthenic d. Sthenic
- When William H. was helping victims after a devastating earthquake in a region not prepared to swiftly set up adequate temporary shelter, he developed severe diarrhea. He was diagnosed as having cholera, a disease transmitted through unsanitary water supplies contaminated by fecal material from infected indiv iduals. The toxin produced by cholera bacteria causes Cl- channels in the lurninal membranes of the intestinal cells to stay open, thereby increasing the secretion of Cl- from the cells into the intestinal tract lumen. By what mechanisms would Na+ and water be secreted into the lumen in conjunction with Cl- secretion? How does this secretory response account for the severe diarrhea that is characteristic of cholera?The nerve impulse travels down a(n) ________, away from the cell body. dendrite axon microglia collagen fiberFever increases the body temperature and can induce chills to help cool the temperature back down. What other mechanisms are in place to regulate the body temperature? shivering sweating erection of the hairs on the arms and legs all of the above
- Which of the following is an example of a normal physiologic process that uses a positive feedback loop? blood pressure regulation childbirth regulation of fluid balance temperature regulationSmoking cigarettes has been shown to be associated with the development of lung cancer. However, a direct correlation between how many cigarettes one smokes and the onset of lung cancer does not exist. A heavy smoker may not develop lung cancer, whereas a light smoker may develop the disease. Explain why this may be.Which of the following is a possible culprit of morning sickness? increased minute respiration decreased intestinal peristalsis decreased aldosterone secretion increased blood volume
- Aspirin is a non-steroidal anti-inflammatory drug (NSAID) that inhibits the formation of blood clots and is taken regularly by individuals with a heart condition. Steroids such as cortisol are used to control some autoimmune diseases and severe arthritis by down regulating the inflammatory response. After reading the role of inflammation in the bodys response to infection, can you predict an undesirable consequence of taking anti inflammatory drugs on a regular basis?Which of the following is not true about acclimatization? Acclimatization allows animals to compensate for changes in their environment Acclimatization improves function in a new environment Acclimatization occurs when an animal tries to reestablish a homeostatic set point Acclimatization is passed on to offspring of acclimated individuals.