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Figure 4


Fig. 4. (A) Response of a hepatic artery (HA) ring to continuous superfusion with glutamic acid (GLU; 10 mmol l–1). Wall force at the time of GLU application was 0.170 mN. (B) Response of a sternal artery (SA) ring, at an initial wall force of 0.914 mN, to continuous superfusion with proctolin (PR; 1.0 µmol l–1).