NURS 6501 1 Quiz Walden University
Question 1
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:
- 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:
- 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. 1 / 2
Correct Answer:
- Turner syndrome
Question 4
How are potassium and sodium transported across plasma membranes?
Correct Answer:
- By adenosine triphosphate enzyme (ATPase)
· Question 5
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:
- 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:
- / 2