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1-7 of 7
Keywords: Atropine
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Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2022) 225 (9): jeb243922.
Published: 5 May 2022
... of this response in aquatic reptiles, including sea turtles, remains under debate. Using the parasympathetic blocker atropine, we evaluated the involvement of the parasympathetic nervous system in heart rate reduction of loggerhead sea turtles ( Caretta caretta ) during voluntary diving in tanks. The heart rate...
Includes: Supplementary data
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2001) 204 (20): 3553–3560.
Published: 15 October 2001
... equipped with an arterial catheter for measurements of blood pressure and heart rate, and autonomic tonus was determined following infusion of the β-adrenergic antagonist propranolol (3 mg kg –1 ) and the muscarinic cholinoceptor antagonist atropine (3 mg kg –1 ). The mean heart rate of fasting animals...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2001) 204 (8): 1519–1527.
Published: 15 April 2001
... amplitude ( V AMP ) and frequency ( f V ). Separate series of experiments were conducted on control, atropinized (100 nmol kg −1 ) and branchially denervated fish to investigate putative CO 2 -chemoreceptive sites on the gills and their link to the autonomic nervous system and cardiorespiratory reflexes...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (2000) 203 (24): 3775–3784.
Published: 15 December 2000
... sympathetic activity. Cardiovascular status was measured in vivo in turtles acclimated to either 22 °C or 5 °C and either acutely exposed (6 h) to anoxia at 22 °C or chronically exposed (22 days) to anoxia at 5 °C. In 22 °C-acclimated turtles, injection of the cholinergic antagonist atropine induced...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (1999) 202 (24): 3647–3658.
Published: 15 December 1999
... temperatures. In addition, the cardiorespiratory responses to hypercapnia and atropine injection (5mgkg−1; 7.4 μmol kg−1) were studied at 25 °C. At 25 °C, systemic blood flow ( Q̇ sys ) exceeded pulmocutaneous blood flow ( Q̇ pc ), indicating a large net right-to-left shunt ( Q̇ pc / Q̇ sys was 0.39). Q̇ pc...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (1995) 198 (11): 2307–2315.
Published: 1 November 1995
...Pierre E. Signore; David R. Jones ABSTRACT Neural control of free and forced diving bradycardia and peripheral resistance was studied in the muskrat ( Ondatra zibethicus ) by means of acute pharmacological blockade with the muscarinic blocker atropine, the α -adrenergic blocker phentolamine...
Journal Articles
Journal:
Journal of Experimental Biology
J Exp Biol (1991) 157 (1): 287–298.
Published: 1 May 1991
... inhibited by vagotomy and partly inhibited by injections of atropine or porcine vasoactive intestinal polypeptide (VIP). Substance P and VIP both increased the rate of secretion in atropinized fish, while 5-hydroxytryptamine (5-HT) and noradrenaline did not affect the rate of filling in either control...