The electrolyte that is most important for maintaining the resting potential of nerve and cardiac muscle cells is:
A. calcium
B. sodium
C. chloride
D. potassium
d
Rationale: Potassium is the electrolyte especially important in maintaining the resting potential of nerve and cardiac mus-cle cells. Abnormal potassium levels may cause these cells to function abnormally.
You might also like to view...
All of the following statements regarding the blood–brain barrier are true EXCEPT:
A) Highly lipid-/fat-soluble molecules such as barbiturates rapidly cross through the BBB into the brain. B) Large molecules do not easily pass through the BBB. C) Highly electrically charged molecules speed up across the BBB. D) Hypertension can open up the BBB.
Which of the following is a form or view that is typically seen in the health record of a long-term care patient but is rarely seen in records of acute care patients?
A. pharmacy consultation C. physical exam B. medical consultation D. emergency record