A 75 year old retired publisher presents for a routine checkup. He has a history of class III congestive heart failure, hypertension, and hyperlipidemia. He is doing well and is taking his medications as prescribed. On exam what would you expect to find?

a) PMI in 5th interspace, midclavicular line, 8cm lateral to the midsternal line
b) PMI in the 5th interspace, anterior axillary line
c) PMI in the 3rd interspace, midclavicular line
d) PMI in the 8th interspace, anterior axillary line

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.