Figure 6. Experimental records illustrating the responses of a pulmonary C-fibre arising from the right middle lobe to capsaicin or anandamide before and after pretreatment with capsazepine in an anaesthetized and open-chest rat.
A, response to intravenous injection of capsaicin (Cap; 0.6 μg kg−1). B, C and D, responses to intravenous injections of anandamide (Ana; 0.4 mg kg−1) before, and 2 and ∼20 min after pretreatment with capsazepine (3 mg kg−1), respectively. See legend to Fig. 4 for further explanation. Rat body weight, 398 g.