The resting potential of the muscle membrane of moths
1. An analysis of the resting potential ( E m ) of the muscle membrane of the hawk moth Sphinx ligustri suggests that it is compounded of two components, an ionic electrode, dominated by E K (contributing some −41 mV) and an active component (contributing some −19 mV). 2. Total E m in vivo is approx...
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| Veröffentlicht in: | Comparative biochemistry and physiology. A, Comparative physiology Comparative physiology, 1975-01, Vol.52 (2), p.295-298 |
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| container_title | Comparative biochemistry and physiology. A, Comparative physiology |
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| creator | Wareham, A.C. Duncan, C.J. Bowler, K. |
| description | 1.
An analysis of the resting potential (
E
m
) of the muscle membrane of the hawk moth
Sphinx ligustri suggests that it is compounded of two components, an ionic electrode, dominated by
E
K
(contributing some −41 mV) and an active component (contributing some −19 mV).
2.
Total
E
m in vivo
is approximately −60 mV.
3.
The active component is sensitive to lowered temperature and to omission of Cl
− from the saline.
4.
E
m
of
Sphinx muscle has very similar properties to those described for cockroach. Comparisons are also made with mammalian smooth muscle.
5.
A new examination of the ionic content of haemolymph and myoplasm gave much higher values for [K
+]
1 and [Na
+]
0 and lower values for [K
+]
0 and [Na
+]
0 than hitherto reported. Calculated
E
K
is therefore higher and it is suggested that it is consistent with an ionic electrode of approximately −40 mV. Comparable results were obtained with ionic analyses of the haemolymph of other species of moth.
6.
The formula is given for a saline for
Sphinx muscle which is as satisfactory as the insect's own haemolymph in maintaining
E
m
. |
| doi_str_mv | 10.1016/S0300-9629(75)80090-9 |
| format | Article |
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An analysis of the resting potential (
E
m
) of the muscle membrane of the hawk moth
Sphinx ligustri suggests that it is compounded of two components, an ionic electrode, dominated by
E
K
(contributing some −41 mV) and an active component (contributing some −19 mV).
2.
Total
E
m in vivo
is approximately −60 mV.
3.
The active component is sensitive to lowered temperature and to omission of Cl
− from the saline.
4.
E
m
of
Sphinx muscle has very similar properties to those described for cockroach. Comparisons are also made with mammalian smooth muscle.
5.
A new examination of the ionic content of haemolymph and myoplasm gave much higher values for [K
+]
1 and [Na
+]
0 and lower values for [K
+]
0 and [Na
+]
0 than hitherto reported. Calculated
E
K
is therefore higher and it is suggested that it is consistent with an ionic electrode of approximately −40 mV. Comparable results were obtained with ionic analyses of the haemolymph of other species of moth.
6.
The formula is given for a saline for
Sphinx muscle which is as satisfactory as the insect's own haemolymph in maintaining
E
m
.</description><identifier>ISSN: 0300-9629</identifier><identifier>DOI: 10.1016/S0300-9629(75)80090-9</identifier><identifier>PMID: 240583</identifier><language>eng</language><publisher>England: Elsevier B.V</publisher><subject>Animals ; cockroach ; haemolymph ; hawk moth ; Hemolymph - analysis ; Lepidoptera - physiology ; Membrane Potentials ; Microelectrodes ; Moths - physiology ; muscle ; Muscles - analysis ; Muscles - physiology ; Potassium - analysis ; resting potential ; Sodium - analysis ; Species Specificity ; Sphinx ; Temperature</subject><ispartof>Comparative biochemistry and physiology. A, Comparative physiology, 1975-01, Vol.52 (2), p.295-298</ispartof><rights>1975 Pergamon Press</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c359t-7e44e30e7b6130a06c67a63419133101fdcbc3de1c56730e77f257bc0f9891ba3</citedby><cites>FETCH-LOGICAL-c359t-7e44e30e7b6130a06c67a63419133101fdcbc3de1c56730e77f257bc0f9891ba3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/240583$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Wareham, A.C.</creatorcontrib><creatorcontrib>Duncan, C.J.</creatorcontrib><creatorcontrib>Bowler, K.</creatorcontrib><title>The resting potential of the muscle membrane of moths</title><title>Comparative biochemistry and physiology. A, Comparative physiology</title><addtitle>Comp Biochem Physiol A Comp Physiol</addtitle><description>1.
An analysis of the resting potential (
E
m
) of the muscle membrane of the hawk moth
Sphinx ligustri suggests that it is compounded of two components, an ionic electrode, dominated by
E
K
(contributing some −41 mV) and an active component (contributing some −19 mV).
2.
Total
E
m in vivo
is approximately −60 mV.
3.
The active component is sensitive to lowered temperature and to omission of Cl
− from the saline.
4.
E
m
of
Sphinx muscle has very similar properties to those described for cockroach. Comparisons are also made with mammalian smooth muscle.
5.
A new examination of the ionic content of haemolymph and myoplasm gave much higher values for [K
+]
1 and [Na
+]
0 and lower values for [K
+]
0 and [Na
+]
0 than hitherto reported. Calculated
E
K
is therefore higher and it is suggested that it is consistent with an ionic electrode of approximately −40 mV. Comparable results were obtained with ionic analyses of the haemolymph of other species of moth.
6.
The formula is given for a saline for
Sphinx muscle which is as satisfactory as the insect's own haemolymph in maintaining
E
m
.</description><subject>Animals</subject><subject>cockroach</subject><subject>haemolymph</subject><subject>hawk moth</subject><subject>Hemolymph - analysis</subject><subject>Lepidoptera - physiology</subject><subject>Membrane Potentials</subject><subject>Microelectrodes</subject><subject>Moths - physiology</subject><subject>muscle</subject><subject>Muscles - analysis</subject><subject>Muscles - physiology</subject><subject>Potassium - analysis</subject><subject>resting potential</subject><subject>Sodium - analysis</subject><subject>Species Specificity</subject><subject>Sphinx</subject><subject>Temperature</subject><issn>0300-9629</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1975</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkMtOwzAQRb3gVQJ_AFJWCBaBcR3H8QqhipdUiQVlbSXOhBrlUWwHib_HaapuWY08d8Zz7yHkksItBZrdvQMDSGQ2l9eC3-QAMrwOyGzfPiGnzn0BAGWUH5OjeQo8ZzPCV2uMLTpvus9403vsvCmauK9jH4R2cLoJBdvSFh2O7bb3a3dGDuuicXi-qxH5eHpcLV6S5dvz6-JhmWjGpU8EpikyQFFmlEEBmc5EkbGUSspY8F1XutSsQqp5JsY5Uc-5KDXUMpe0LFhErqZ_N7b_HoJL1RqnsWmCmX5wKg_xOA1BIsKnQW175yzWamNNW9hfRUGNhNSWkBpRKMHVlpCSYe9id2AoW6z2WxOeIN9PMoaQPwatctpgp7EyFrVXVW_-OfAHOUV2CQ</recordid><startdate>19750101</startdate><enddate>19750101</enddate><creator>Wareham, A.C.</creator><creator>Duncan, C.J.</creator><creator>Bowler, K.</creator><general>Elsevier B.V</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>19750101</creationdate><title>The resting potential of the muscle membrane of moths</title><author>Wareham, A.C. ; Duncan, C.J. ; Bowler, K.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c359t-7e44e30e7b6130a06c67a63419133101fdcbc3de1c56730e77f257bc0f9891ba3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1975</creationdate><topic>Animals</topic><topic>cockroach</topic><topic>haemolymph</topic><topic>hawk moth</topic><topic>Hemolymph - analysis</topic><topic>Lepidoptera - physiology</topic><topic>Membrane Potentials</topic><topic>Microelectrodes</topic><topic>Moths - physiology</topic><topic>muscle</topic><topic>Muscles - analysis</topic><topic>Muscles - physiology</topic><topic>Potassium - analysis</topic><topic>resting potential</topic><topic>Sodium - analysis</topic><topic>Species Specificity</topic><topic>Sphinx</topic><topic>Temperature</topic><toplevel>online_resources</toplevel><creatorcontrib>Wareham, A.C.</creatorcontrib><creatorcontrib>Duncan, C.J.</creatorcontrib><creatorcontrib>Bowler, K.</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Comparative biochemistry and physiology. A, Comparative physiology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wareham, A.C.</au><au>Duncan, C.J.</au><au>Bowler, K.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The resting potential of the muscle membrane of moths</atitle><jtitle>Comparative biochemistry and physiology. A, Comparative physiology</jtitle><addtitle>Comp Biochem Physiol A Comp Physiol</addtitle><date>1975-01-01</date><risdate>1975</risdate><volume>52</volume><issue>2</issue><spage>295</spage><epage>298</epage><pages>295-298</pages><issn>0300-9629</issn><abstract>1.
An analysis of the resting potential (
E
m
) of the muscle membrane of the hawk moth
Sphinx ligustri suggests that it is compounded of two components, an ionic electrode, dominated by
E
K
(contributing some −41 mV) and an active component (contributing some −19 mV).
2.
Total
E
m in vivo
is approximately −60 mV.
3.
The active component is sensitive to lowered temperature and to omission of Cl
− from the saline.
4.
E
m
of
Sphinx muscle has very similar properties to those described for cockroach. Comparisons are also made with mammalian smooth muscle.
5.
A new examination of the ionic content of haemolymph and myoplasm gave much higher values for [K
+]
1 and [Na
+]
0 and lower values for [K
+]
0 and [Na
+]
0 than hitherto reported. Calculated
E
K
is therefore higher and it is suggested that it is consistent with an ionic electrode of approximately −40 mV. Comparable results were obtained with ionic analyses of the haemolymph of other species of moth.
6.
The formula is given for a saline for
Sphinx muscle which is as satisfactory as the insect's own haemolymph in maintaining
E
m
.</abstract><cop>England</cop><pub>Elsevier B.V</pub><pmid>240583</pmid><doi>10.1016/S0300-9629(75)80090-9</doi><tpages>4</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0300-9629 |
| ispartof | Comparative biochemistry and physiology. A, Comparative physiology, 1975-01, Vol.52 (2), p.295-298 |
| issn | 0300-9629 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_83005158 |
| source | MEDLINE; Alma/SFX Local Collection |
| subjects | Animals cockroach haemolymph hawk moth Hemolymph - analysis Lepidoptera - physiology Membrane Potentials Microelectrodes Moths - physiology muscle Muscles - analysis Muscles - physiology Potassium - analysis resting potential Sodium - analysis Species Specificity Sphinx Temperature |
| title | The resting potential of the muscle membrane of moths |
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