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?
Correct Answer:
b. Na+ rushing into the cell
· Question 2
When a patient asks what causes cystic fibrosis, how should the nurse respond? Cystic fibrosis is
caused by an _____ gene.
Answer
Correct Answer:
d. Autosomal recessive
· Question 3
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:
c. Turner syndrome
Question 4
How are potassium and sodium transported across plasma membranes?
Correct Answer:
c. By adenosine triphosphate enzyme (ATPase)
· Question 5
The ion transporter that moves Na+ and Ca2+ simultaneously in the same direction is an example
of which of the following types of transport?
Correct Answer:
d. Symport
· Question 6
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:
, b.
Expressivity
· Question 7
A nurse is reviewing the pedigree chart. When checking for a proband, what is the nurse looking
for?
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:
Correct Answer:
a.
Sodium
·
Question 9
, A 13-year-old girl has a karyotype that reveals an absent homologous X chromosome with only a
single X chromosome present. What medical diagnosis will the nurse observe on the chart?
Correct Answer:
c.
Turner syndrome
· Question 10
A patient who has diarrhea receives a hypertonic saline solution intravenously to replace the
sodium and chloride lost in the stool. What effect will this fluid replacement have on cells?
Correct Answer:
c.
Cells will shrink.
· Question 11
Which of the following mutations have the most significant effect on protein synthesis?
Correct Answer:
d.
Frameshift mutations
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller WALDENUNIVERSITYQUIZ. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $30.49. You're not tied to anything after your purchase.
