Explored Pathophysiology Midterm
Exam 6501
A runner has depleted all the oxygen available for muscle energy. Which of the
following will facilitate his continued muscle performance? - CORRECT ANSWER -
Answer: Anaerobic glycolysis
What causes the rapid change in the resting membrane potential ...
Explo red Pathophysiology Midterm Exam 6501 A runner has depleted all the oxygen available for muscle energy. Which of the following will facilitate his continued muscle performance? - CORRECT ANSWER -
Answer: Anaerobic glycolysis What causes the rapid change in the resting membrane potential that initiates an action potential? - CORRECT ANSWER -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 ANSWER -Answer: XXY A nurse is reviewing the pedigree chart. When checking for a proband, what is the nurse looking for? - CORRECT ANSWER -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 ANSWER -Answer: Expressivity In teaching a patient with cirrhosis, which information should the nurse include regarding cholesterol? - CORRECT ANSWER -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 ANSWER -Answer: Autosomal recessive How are potassium and sodium transported across plasma membranes? - CORRECT ANSWER -Answer: By adenosine triphosphate enzyme (ATPase) The nurse would be correct in identifying the predominant extracellular cation as: - CORRECT ANSWER -Answer: Sodium The early dilation (swelling) of the cell's endoplasmic reticulum results in: - CORRECT ANSWER -Answer: Reduced protein synthesis What principle should the nurse remember when trying to distinguish aging from diseases? - CORRECT ANSWER -Answer: It is difficult to tell the difference because both processes are believed to result from cell injury. What is the diagnosis of a 13 -year-old female who has a karyotype that reveals an absent homologous X chromosome with only a single X chromosome present? Her features include a short stature, widely spaced nipples, reduced carrying angle at the elbow, and sparse body hair. - CORRECT ANSWER -Answer: Turner syndrome A eukaryotic cell is undergoing DNA replication. In which region of the cell would most of the genetic information be contained? - CORRECT ANSWER -Answer: Nucleolus The nurse is teaching staff about the most common cause of Down syndrome. What is the nurse describing? - CORRECT ANSWER -Answer: Maternal nondisjunction A 50-year-old male was recently diagnosed with Huntington disease. Transmission of this disease is associated with: - CORRECT ANSWER -Answer: Delayed age of onset A patient wants to know the risk factors for Down syndrome. What is the nurse's best response? - CORRECT ANSWER -Answer: Pregnancy in women over age 35 What is the role of cytokines in cell reproduction? - CORRECT ANSWER -Answer: Provide growth factor for tissue growth and development A newborn male is diagnosed with albinism based on skin, eye, and hair appearance. Which finding will support this diagnosis? - CORRECT ANSWER -Answer: Inability to convert tyrosine to DOPA (3,4 dihydroxyphenylalanine) Sodium and water accumulation in an injured cell are a direct result of: - CORRECT ANSWER -Answer: Decreased ATP production A nurse is reading a chart and sees the term oncotic pressure. The nurse recalls that oncotic pressure (colloid osmotic pressure) is determined by: - CORRECT ANSWER -
Answer: Plasma proteins The ion transporter that moves Na + and Ca 2+ simultaneously in the same direction is an example of which of the following types of transport? - CORRECT ANSWER -
Answer: Symport A 20-year-old pregnant female gives birth to a stillborn child. Autopsy reveals that the fetus has 92 chromosomes. What term may be on the autopsy report to describe this condition? - CORRECT ANSWER -Answer: Tetraploidy Why is potassium able to diffuse easily in and out of cells? - CORRECT ANSWER -
Answer: Because the resting plasma membrane is more permeable to potassium Hypothyroidism - CORRECT ANSWER -A disorder caused by a thyroid gland that is slower and less productive than normal, does not produce enough T3 and T4 T3, T4, TSH - CORRECT ANSWER -Diagnosing hypo/hyperthyroidism T3/T4 = thyroid. TSH = Pituitary.
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