. Ciba Foundation colloquia on ageing. Old age; Aging; Animals -- growth & development. 66 J0RN Hess Thaysen are present in parotid saliva and in sweat in sufficiently large concentration to make up for this difference. Judging from the results of Table I, the production of sweat and parotid saliva should therefore involve secretion of hypotonic precursor solutions, a process which a priori does not appear very • y» ()() 20 40 60 100 120 X«SECRETORY RATE (mg/gram gland/min) Fig. 2. The relation between the rate of sodium excretion in parotid sahva (in microequi
. Ciba Foundation colloquia on ageing. Old age; Aging; Animals -- growth & development. 66 J0RN Hess Thaysen are present in parotid saliva and in sweat in sufficiently large concentration to make up for this difference. Judging from the results of Table I, the production of sweat and parotid saliva should therefore involve secretion of hypotonic precursor solutions, a process which a priori does not appear very • y» ()() 20 40 60 100 120 X«SECRETORY RATE (mg/gram gland/min) Fig. 2. The relation between the rate of sodium excretion in parotid sahva (in microequivalents per gram gland per minute) and secretory rate (in milligrams per gram gland per minute). The linear regression has been calculated for all data at or above a secretory rate of 60 milligrams per gram gland per minute. It must be emphasized, however, that the calculated figures for precursor sodium concentration (and sodium reabsorp- tion) in the sweat and parotid glands underestimate actual values, since the regressions for sodium excretion on secretory rate have been fitted to points which approach, but do not reach, a rectilinear relationship within the observed range (cf. Fig. 2). One explanation for this considerable splay in. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ciba Foundation; Wolstenholme, G. E. W. (Gordon Ethelbert Ward). Boston, Little, Brown
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