Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Transcribed Image Text:The following are oscilloscope tracings displaying the contractile activity of an isolated frog heart. Tracing A was taken while the heart was suspended in 23°C standard
Ringer's solution. What was most likely changed to obtain tracing B?
2
4
21
Time (msec)
5
Time (msec)
F
1161
TA
8
CO
10
O The Ringer's solution was cooled to 5°C
Acetylcholine was added to the Ringer's solution
A cholinergic agonist was added to the Ringer's solution
O An adrenergic antagonist was added to the Ringer's solution
Epinephrine was added to the Ringer's solution
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