This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Which of the following cell types is least sensitive to anoxia? 
Select and explain. 
A. Neurons, B. Cardiac myocytes, C. Fibroblasts, D. Proximal renal tubule cells
C: Fibroblasts
Answer: C: Fibroblasts 
Explanation: Highly specialized cells, such as neurons, cardiac myocytes, small intestinal absorptive cells, and cells of the proximal renal tubule, are much more sensitive to anoxia than are fibroblasts. The former require more oxygen for maintenance of their complex functions.