Answer to Question 1
D
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A Incorrect: Caregivers of a toddler will realize that developing depth perception will not cause the child to have an increased fear of heights and of falling out of bed at night.
B Incorrect: Caregivers of a toddler will realize that developing depth perception will not bring about an unusual sense of dizziness at times.
C Incorrect: Caregivers of a toddler will realize that developing depth perception will not cause the child difficulty in learning to swim and in swimming.
D Correct: Caregivers of a toddler will realize that developing depth perception will put their child at risk for frequent falls when learning to walk, run, and climb stairs.
Answer to Question 2
D
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A Incorrect. Explaining why the solubility test is followed by a hemoglobin electrophoresis test, the most accurate statement is not that the physician needs two tests to verify the results.
B Incorrect. Explaining why the solubility test is followed by a hemoglobin electrophoresis test, the most accurate statement is not that hemoglobin electrophoresis reveals the severity of the anemia.
C Incorrect. Explaining why the solubility test is followed by a hemoglobin electrophoresis test, the most accurate statement is not that the solubility test has to do with what solutions will dissolve a sickle cell and the electrophoresis with determining the electrical charge.
D Correct. Testing would begin with a sickle solubility test in order to confirm the presence of Hb S in the blood. If this test is positive, hemoglobin electrophoresis would then be conducted to determine the amount of Hb S in the blood. The results of this test can then be used to differentiate SCA from other types of sickle disease.