This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
Function of myoepithelial cell: 
Select and explain. 
A. Accelerate the initial outflow of saliva from the acini., B. Reduce the luminal volume., C. Contribute to secretory pressure in the acini or duct., D. All of the above.
D: All of the above.
Answer: D: All of the above. 
Explanation: Accelerate the initial outflow of saliva from the acini.
Reduce luminal volume. The intercalated ducts may shorten and widen the ducts helping to maintain their patency.
Contribute to secretory pressure in the acini or duct.
Support the underlying parenchyma and reduce the back permeation of fluid.
Help salivary flow to overcome increase in peripheral resistance of the ducts