A runner has depleted all the oxygen available for muscle energy. Which of the
following will facilitate his continued muscle performance?
ANSWER: Answer: Anaerobic glycolysis
What causes the rapid change in the resting membrane potential that initiates an action
potential?
ANSWER: Answer:...
A runner has depleted all the oxygen available for muscle energy. Which of the
following will facilitate his continued muscle performance?
ANSWER: Answer: Anaerobic glycolysis
What causes the rapid change in the resting membrane potential that initiates an action
potential?
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?
ANSWER: Answer: XXY
A nurse is reviewing the pedigree chart. When checking for a proband, what is the
nurse looking for?
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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?
ANSWER: Answer: Expressivity
In teaching a patient with cirrhosis, which information should the nurse include
regarding cholesterol?
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
ANSWER: Answer: Autosomal recessive
How are potassium and sodium transported across plasma membranes?
ANSWER: Answer: By adenosine triphosphate enzyme (ATPase)
The nurse would be correct in identifying the predominant extracellular cation as:
ANSWER: Answer: Sodium
The early dilation (swelling) of the cell's endoplasmic reticulum results in:
ANSWER: Answer: Reduced protein synthesis
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What principle should the nurse remember when trying to distinguish aging from
diseases?
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.
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?
ANSWER: Answer: Nucleolus
The nurse is teaching staff about the most common cause of Down syndrome. What is
the nurse describing?
ANSWER: Answer: Maternal nondisjunction
A 50-year-old male was recently diagnosed with Huntington disease. Transmission of
this disease is associated with:
ANSWER: Answer: Delayed age of onset
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