Mary has been accidentally urinating a little bit whenever she coughs or sneezes. her urologist diagnoses her with and tells her that it is a bladder control condition of involuntary urination during coughing, sneezing, laughing, exercise, or other sudden movement. mary’s urologist recommends that she do exercises to strengthen her pelvic floor muscles.

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.