Table 3.

Mean values (or range of values) of tubular resorption and secretion and electrolyte (sodium, potassium and chloride) excretion in urine in some species of livestock. P - plasma level (mmol/l); C - clearance (ml/min/m²); F - filtered load (mmol/min/m²);TR - tubular resorption (%); and, U*V - excretion in urine (μmol/min/m²).

	Sodium
	P	C	F	TR	U*V	References [n - numbers of animals]
goats		0,1		99,9		Vogel [63]; [n = 12]
	135-145					Muszczynski [35]; [n = 12]
goat kids	143-149			97.3-99.5	1.19-5.68*	Drzezdzon et al. [18]; [n = 8]
sheep		0.76		99.9		Vogel [63]
cattle		0.1		99.9		Vogel [63]
calves	120-135	0.02-0.51	4.7-6.0			Skrzypczak [49]; [n = 10]
				98.5-99.5	0.22-4.3*	Skrzypczak et al. [53]; [n = 10]
horses		0.1				Vogel [63]
	Potassium
	P	C	F	TR	U*V
goats		25		70.5		Vogel [63]
	4.5-5.4					Muszczynski [35]
sheep				90		Vogel [63]
cattle		80				Vogel [63]
calves	3.4-4.9	5.31-28.83	0.15-0.21	24-54	26-134	Skrzypczak [49]
	Chloride
	P	C	F	TR	U*V
goats		1.1		99.28		Vogel [63]
	93-103					Muszczynski [35]
sheep		1.77				Vogel [63]
cattle		0.7				Vogel [63]
calves	91-99	0.16-2.38	3.8-4.5	93-100	23-217	Skrzypczak [49]
horses		0.38				Vogel [63]