1. Dr. Willow has ordered that Annabelle Halverson, a 45-year-old woman undergoing a routine physical, have a screening test for occult blood in the feces.

1. Dr. Willow has ordered that Annabelle Halverson, a 45-year-old woman undergoing a routine physical, have a screening test for occult blood in the feces. Identify and discuss conditions that might cause occult blood to appear in feces. Describe the special preparation necessary for this test. What circumstances might influence the results?

2. Carol Jeffers, a 70-year-old female, is suspected of having cardiac abnormalities. Dr. Brown has ordered an echocardiogram. Discuss how this ultrasound examination is performed and why it is done. What abnormalities can be identified with this study?

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