Table 3.

Duct parameters

Dimensions
S	2,123.7 μm2	Cell surface area (Ref. 43)
L	2.5 mm	Extended duct length
Lf	1,000 μm	Intralobular duct length (Ref. 15)
RA	3 μm	2–3 μm (Ref. 45)
D	800 μm2•s−1	D = 290-1,300 μm2•s−1 cytosolic (ref. 8)-free solution (Ref. 9)
Additional parameters
T	310 K
R	8.3145 J•K−1•mol−1
F	96,490 C•mol−1
LB	0.04 L•μm•J−1•s−1	BLM permeability
	2.26 × 107	cells/100 mg (Ref. 37)
	67 mg	mass of SMG gland
	6	cells/acinus

See text for definitions.