Skeletal lymph muscles are effectors of the arterial baroreflex in the cane toad (Rhinella marina)

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Poster for the 2012 University Scholars Day at the University of North Texas discussing skeletal lymph muscles as effectors of the arterial baroreflex in the cane toad (Rhinella marina).

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1 p.

Creation Information

Wall, Matthew & Hedrick, Michael April 19, 2012.

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This poster is part of the collection entitled: UNT Undergraduate Student Works and was provided by the UNT Honors College to the UNT Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 231 times. More information about this poster can be viewed below.

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  • Wall, Matthew University of North Texas; Undergraduate Research Fellow

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  • Hedrick, Michael University of North Texas; Faculty Mentor; michael.hedrick@unt.edu

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  • Main Title: Skeletal lymph muscles are effectors of the arterial baroreflex in the cane toad (Rhinella marina)
  • Series Title: University Scholars Day

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Description

Poster for the 2012 University Scholars Day at the University of North Texas discussing skeletal lymph muscles as effectors of the arterial baroreflex in the cane toad (Rhinella marina).

Physical Description

1 p.

Notes

Abstract: A number of skeletal muscles play an important role in regulating lymph flux in frogs and toads by changing the compliance of lymph sacs moving lymph toward the lymph hearts. The lymph hearts pump lymph into the circulatory system to maintain blood pressure and blood volume. Because lymph mobilization in anurans is dependent upon blood volume/ pressure status, we hypothesized that lymph muscles, like cardiac and lymph heart effectors, are also regulated by the baroreflex. We tested this hypothesis by measuring muscle activity with electromyography while increasing mean arterial blood pressure (MAP) with phenylephrine (Phe; 0.02-1.0 mg/kg, i.v.) and decreasing MAP with sodium nitroprusside (SNP; 0.02-1.0 mg/kg, i.v.). Decreasing MAP with SNP resulted in a 275% increase in lymph muscle contraction frequency while increasing MAP and Phe had no effect on muscle burst frequency. These results suggest that lymph muscles are regulated by MAP and are effectors of the baroreflex. Supported by NSF-IOS 0843082.

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  • Ninth Annual University Scholars Day, 2012, Denton, Texas, United States

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UNT Undergraduate Student Works

This collection presents scholarly and artistic content created by undergraduate students. All materials have been previously accepted by a professional organization or approved by a faculty mentor. Most classroom assignments are not eligible for inclusion. The collection includes, but is not limited to Honors College theses, thesis supplemental files, professional presentations, articles, and posters. Some items in this collection are restricted to use by the UNT community.

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Creation Date

  • April 19, 2012

Added to The UNT Digital Library

  • June 18, 2012, 9:19 a.m.

Description Last Updated

  • March 11, 2020, 10:13 a.m.

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Wall, Matthew & Hedrick, Michael. Skeletal lymph muscles are effectors of the arterial baroreflex in the cane toad (Rhinella marina), poster, April 19, 2012; (https://digital.library.unt.edu/ark:/67531/metadc86755/: accessed March 26, 2025), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Honors College.

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