215.The cells labeled with the asterisks in the center of the transmission
electron micrograph below function in which of the following processes?
Gastrointestinal Tract and Glands 323(Reproduced with permission, from McKenzie, Klein, Am. J. Anat. 164: 175–186, 1982.)a. Immune defense mechanisms
b. Mucus secretion
c. Heparin and histamine secretion and release
d. Endocrine secretion
e. Regulation of the flora of the small bowel