How are potassium and sodium transported across plasma membranes?
Answer
Correct Answer: c.
By adenosine triphosphate enzyme (ATPase)
Question 2
The ion transporter that moves Na+ and Ca2+ simultaneously in the same
direction is an example of which of the following types of transport?
Answer
Correct Answer: d.
Symport
Question 3
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
Correct Answer: b.
Expressivity
Question 4
A cell is isolated, and electrophysiology studies reveal that the resting
membrane potential is ?70 millivolts. The predominant intracellular ion is Na+,
and the predominant extracellular ion is K+. With voltage change, which of the
following would result in an action potential?
Answer
Correct b.
Answer: Na+ rushing into the cell
, Question 5
When a patient asks what causes cystic fibrosis, how should the nurse respond?
Cystic fibrosis is caused by an _____ gene.
Answer
Correct d.
Answer: Autosomal recessive
Question 6
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
Correct Answer: c.
Turner syndrome
Question 7
A nurse is reviewing the pedigree chart. When checking for a proband, what is
the nurse looking for?
Answer
Correct Answer: a.
The person who is first diagnosed with a genetic disease
Question 8
The nurse would be correct in identifying the predominant extracellular cation
as:
Answer
Correct a.
Answer: Sodium
Question 9
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