The quad cab has a smaller back seat and a larger bed, the crew cab has a larger back seat and a smaller bed. To compare them you can go to http://www.ramtrucks.com/en/2011/ram_150... and select the Build My Own option from the bottom of the page.
Heart muscle thickening (called cardiac hypertrophy) can be a healthy response to exercise and pregnancy; however, it often occurs in people with high blood pressure, diabetes, heart failure and certain genetic conditions.
Abnormal heart muscle thickening - potential treatment. FULL STORY. The top photo shows heart muscle cells treated with a drug to induce hypertrophy (abnormal growth). The bottom photo shows heart muscle cells treated with the same drug, but also treated with an experimental therapy that blocks programmed cell death (and abnormal growth).