Cat heart muscle in vitro. II. The steady state restpotential in quiescent papillary muscles.
The steady state transmembrane resting potential difference (V(m)) has been measured in quiescent papillary muscles. V(m) was determined as a function of the external K concentration in Cl and SO(4) solutions and compared with the K equilibrium potential. Other measurements were made after replacement of external Na by choline, K by Rb and Cs, and Cl by SO(4), CH(3)SO(4), and NO(3). Effects on V(m) of albumin, temperature, and variation in internal K concentration are described.
D000818:Animals; D002415:Cats; D066298:In Vitro Techniques; D007477:Ions; D008564:Membrane Potentials; D010210:Papillary Muscles; D011188:Potassium; D012964:Sodium; D013696:Temperature
D007477:Ions; D012964:Sodium; D011188:Potassium
IONS; PAPILLARY MUSCLES