There are two distinct cell populations lining the human mammary ductal and terminal lobular units: which are they?

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Multiple Choice

There are two distinct cell populations lining the human mammary ductal and terminal lobular units: which are they?

Explanation:
The two cell populations lining the human mammary ductal and terminal lobular units are ductal cells and luminal cells. The ductal cells form the epithelial lining along the walls of the ducts, while the luminal cells line the lumen of the ducts and alveolar structures. Together, these two populations make up the inner epithelial lining of the ductal–lobular system. (Context: there’s also a layer of myoepithelial cells beneath this epithelium that assists milk expulsion, but the question focuses on the two surface-lining populations.)

The two cell populations lining the human mammary ductal and terminal lobular units are ductal cells and luminal cells. The ductal cells form the epithelial lining along the walls of the ducts, while the luminal cells line the lumen of the ducts and alveolar structures. Together, these two populations make up the inner epithelial lining of the ductal–lobular system. (Context: there’s also a layer of myoepithelial cells beneath this epithelium that assists milk expulsion, but the question focuses on the two surface-lining populations.)

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