Experimental Physiology
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Quarterly Journal of Experimental Physiology 15.4 pp 367-376
© The Physiological Society 1925
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EXPERIMENTS ON CONTRACTION OF WHITE CONNECTIVE TISSUE FIBRES

C. J. Tidmarsh 1 and John Tait 1

1 Laboratory of Physiology and Experimental Medicine, M'Gill University, Montreal

1. In heat contraction of mouse-tail tendon, localised swellings commence at certain points along the tendon. A partially contracted tendon has the appearance of a knotted cord with normal portions of tendon between the knots. Only when contraction is maximal is the whole tendon swollen.

2. Immersion of the tendon in solutions of CaCl2 markedly affects the temperature at which contraction is induced. The higher the concentration of calcium salt, the lower the temperature at which the tendon will contract; with 48 per cent. of CaCl2 the tendon will contract at 0°C. The relation between concentration and temperature is approximately linear.

3. Immersion in solutions of BaCl2 likewise affects the temperature at which contraction is induced. Thirty per cent. BaCl2 causes contraction at 38°C. The relation between concentration and temperature is again linear.

The expenses of this research were defrayed by a grant from the James Cooper Fund of M'Gill University for Research in Experimental Medicine.

Submitted on June 29, 1925






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Copyright © 1925 by the The Physiological Society.