A client has been brought to the emergency department following an overdose of insulin that resulted in unconsciousness. When explaining the rationale for this to the family, the nurse will emphasize that neurons:
A) Store glycogen within the brain cavity
B) Must rely on glucose from the blood to meet their energy needs
C) Require many amino acids in order to produce enough energy to function properly
D) Can cause the liver to convert triglycerides into energy if needed quickly
Ans: B
Feedback:
Nervous tissue has a high rate of metabolism. Glucose is the major fuel source for the nervous system. Unlike muscle cells, neurons have no glycogen stores and must rely on glucose from the blood or the glycogen stores of supporting glial cells to meet their energy needs. Persons receiving insulin for diabetes may experience signs of neural dysfunction and unconsciousness when blood glucose drops because of insulin excess. Neither amino acid production nor liver conversion of triglycerides will produce the quick energy that the brain requires to function properly.
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