This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epithelial tissue, Subject name: Anatomy
[{'content': 'Myoepithelium:- \nSelect and explain. \nA. These are epithelial cells covering the muscle tissue, B. These are muscle cells, C. These are epithelial cells with contractile units, D. None of above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Myoepithelial cells are epithelial cells with contractile units. These may be positive for alpha smooth muscle actin and can contract and expel the secretions of exocrine glands. Epithelial cells of various sites, paicularly sweat glands, mammary glands, salivary glands, may acquire the characteristics of smooth muscle cells are known as myoepithelial cells. Myoid cells of testis have contractile function in the seminiferous tubule.', 'role': 'assistant'}]