For Step 1, what exactly are Clara cells?

[ChessMaster3000]

I know what Clara cells are. My question is, FOR STEP 1, what are clara cells? They secrete a component of surfactant, but on step 1 surfactant producing cells are Type 2 pneumocytes. They degrade toxins with a cyp450 SER, but on Step 1 such a description would almost always apply to a hepatocyte. They ahve secretory granules, but so do a ton of other cells. They act as "reserve cells" but again, on step 1 this is the case with Type 2 pneumocytes. So--if there is a distinguishing feature of club cells that is testable on step 1, i dont know what it is. The only thing I got is that it is nonciliated.

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[Bertram Lupov]

I know what Clara cells are. My question is, FOR STEP 1, what are clara cells? They secrete a component of surfactant, but on step 1 surfactant producing cells are Type 2 pneumocytes. They degrade toxins with a cyp450 SER, but on Step 1 such a description would almost always apply to a hepatocyte. They ahve secretory granules, but so do a ton of other cells. They act as "reserve cells" but again, on step 1 this is the case with Type 2 pneumocytes. So--if there is a distinguishing feature of club cells that is testable on step 1, i dont know what it is. The only thing I got is that it is nonciliated.

The only Step 1 nugget I can think of is that bronchioloalveolar carcinoma may arise from clara cells.