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. Author manuscript; available in PMC: 2014 Jul 1.
Published in final edited form as: Respir Physiol Neurobiol. 2013 Apr 13;187(3):234–243. doi: 10.1016/j.resp.2013.04.004

Fig 4. Effect of 10-wk nicotine or ethanol exposure on lung burst frequency of late metamorphic tadpoles.

Fig 4

(A) Mean lung burst frequency during last 10 min of normoxia and response to hypoxia (the last 10 min of a 180-min hypoxia treatment) in control and nicotine- or ethanol-exposed late metamorphic tadpoles. (B) Percent change in lung burst frequency from normocapnia during each 10-min period of hypoxia. Control and nicotine-exposed tadpoles decreased lung burst frequency in response to hypoxia (* = P ≤ 0.05). Data presented are mean ± SE for 6 – 7 tadpoles.