A runner has depleted all the oxygen available for muscle energy. Which of the following will facilitate his continued muscle performance? – correct answers Answer: Anaerobic glycolysis What causes the rapid change in the resting membrane potential that initiates an action potential? – correct answers Answer: Sodium gates open, and sodium rushes into the cell, changing the membrane potential from negative to positive. A 12-year-old male is diagnosed with Klinefelter syndrome. His karyotype would reveal which of the following? – correct answers Answer: XXY A nurse is reviewing the pedigree chart. When checking for a proband, what is the nurse looking for? – correct answers Answer: The person who is first diagnosed with a genetic disease An aide asks the nurse why people who have neurofibromatosis will show varying degrees of the disease. Which genetic principle should the nurse explain to the aide? – correct answers Answer: Expressivity In teaching a patient with cirrhosis, which information should the nurse include regarding cholesterol? – correct answers Answer: Cholesterol decreases the membrane fluidity of the erythrocyte, which reduces its ability to carry oxygen. When a patient asks what causes cystic fibrosis, how should the nurse respond? Cystic fibrosis is caused by an _____ gene – correct answers Answer: Autosomal recessive How are potassium and sodium transported across plasma membranes? – correct answers Answer: By adenosine triphosphate enzyme (ATPase)
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