Circulation of Body Fluids 



563 



TABLE 69. EFFECTS OF SALTS IN HIGH (SUPRAOPriMAL) AND LOW 



(SllBOPTlMAL) CONCENTRATIONS ON HEARTS IN RESPECT TO 



RATE OF BEAT, AMPLITUDE, TONE, AND STATE 



WHEN ARRESTED. 



+ , increase; — , decrease in a function. High concentrations given X normal. 



Animal 



Rate Ampl. Tonus Arrest Rate Ampl. Tonus Arrest 



HIGH SODIUM 



LOW SODIUM 



Frog'" 



Oyster" 



Pecten'^'' 



Aplysia'" 

 Cambarus 



Homarus'' 

 Limuius''" 



sl + 



+ 



sl4- 

 arr>'thmic 



+ 







sl + 



+ 

 (diast.) 



tends to 

 systole 



tends to 

 systole 

 systole 

 systole 



pure NaCl 

 systole 



pure NaCl 

 svstole 



-f, conduction 

 impaired 



syst. 



diast. 



HIGH POTASSIUM 



LOW POTASSIUM 



