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Starch is digested by ptyalin.
no ptyalin is not secretes by the cells in the stomach
The enzyme ptyalin ,or salivary amylase acts on starches and converts them to maltose.
Ptyalin is an enzyme, which means that it is made up of proteins. When a protein enters the stomach, it is denatured by HCL, which is a kind of acid. This results in the Ptyalin no longer being effective.
Ptyalin is the chemical in human saliva that helps break down food in your mouth.
Ptyalin is produced in and secreted by the salivary glands, of which humans have three. The parotid, submandibular (submaxillary) and sublingual salivary glands.