ions
The Oxford Companion to the Body
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2001
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© The Oxford Companion to the Body 2001, originally published by Oxford University Press 2001. (Hide copyright information)
Copyright
ions carry an electric charge or charges. Those with one or more positive charges are called cations, whereas those with negative charges are called anions. The names arise from considering what happens if a current is passed through an ionic solution; cations migrate to the cathode and anions to the anode, allowing current to flow through the solution. Common inorganic cations found in the body are sodium (Na
+), potassium (K
+), and calcium (Ca
2+), while common anions are chloride (Cl
-) and bicarbonate (HCO
3-). Neither anions or cations can exist in isolation, as the total electrical charge must be in balance. A solution of sodium chloride will have an equal number of Na
+ and Cl
- ions, and a solution of calcium chloride will have twice the number of Cl
- ions as Ca
2+ ions. Organic molecules can also be ionic. The neurotransmitter acetylcholine chloride will give, in solution, a positively charged acetylcholine moiety together with a chloride ion. Some organic molecules may carry a positive and a negative charge on different parts of the molecule and are known as
zwitterions.
Alan W. Cuthbert
See also
body fluids;
composition of the body.
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Ireland's little-known Achill Island is rich in history, happenings
Newspaper article from: The Patriot Ledger Quincy, MA; 3/9/2002; ; 700+ words
; ...of Kerry, turn northwest and head for Achill Island in County Mayo - a lesser known...Ireland's largest offshore island, Achill is only 15 miles long and 12 miles wide...photographers. There's even a bank machine in Achill Sound for traveling folk. Achill has...
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 "Orangeville Banner (Orangeville, Ontario)")
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Achill Choral presents holiday concert; Show features sing-a-long.
Newspaper article from: Orangeville Banner (Orangeville, Ontario); 11/17/2006; 700+ words
; ...will have the opportunity to witness the Achill Choral Society's annual holiday concert...answers Jerry Black, president of the Achill Choral Society, when asked how he would...available at several outlets in the area. Achill Choral Society will also bring the Glorious...
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 "The Mirror (London, England)")
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JCB DRIVER LIFTS 315M; Achill Island man wins UK Lotto jackpot.(News)
Newspaper article from: The Mirror (London, England); 1/3/2003; 700+ words
; ...the UK lottery. Damian Madden, from Achill Island, Co Mayo, was the only winner...Last night his family and friends on Achill were celebrating his win and were still...lying low yesterday but a relative in Achill confirmed the win. An uncle said...
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'Lucky' angler rescued off Achill
Newspaper article from: The Irish Times; 8/24/2009; ; 454 words
; ...fell into the sea while shore angling on Achill Island, Co Mayo, on Saturday survived...Hospital, is in his 40s and is visiting Achill. He went shore fishing at a place known...Quarry near Dugort on the north side of Achill Island with a companion on Saturday...
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 "The Racing Post (London, England)")
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O'Brien expecting Achill to improve on French run.(Sports)
Newspaper article from: The Racing Post (London, England); 5/9/2008; 586 words
; ...three-year-olds at Chester in the last five seasons and is represented by Achill Island What they say Aidan O'Brien, trainer of Achill Island and Sligo "Achill Island showed good form last year, finishing second in the Royal Lodge and the...
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Weekender: travel: Pictures paint a thousand words; VANESSA O'LOUGHLIN BRUSHES UP ON ACHILL.(Features)
Newspaper article from: The Mirror (London, England); 11/13/2004; 700+ words
; ...O'Dalaigh School of Painting close to Achill Island with a stopover in Westport about 25 miles from Achill. First stop was the Atlantic Coast Hotel...away in a sheltered sea inlet on the main Achill Road. The school is run by Joe Daly...
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Student drowns when van plunges off cliff near Achill Island beauty spot
Newspaper article from: The Irish Times; 10/27/2009; ; 491 words
; ...DEATHS: A 19-YEAR-OLD student from Achill Island was drowned early yesterday after...Atlantic near a well-known beauty spot on Achill. Nigel McNamara was the youngest member of a family of eight from Pollagh, Keel, Achill. The van left the road on a stretch of...
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Weekender: northern ireland travel: Pictures paint a thousand words; VANESSA O'LOUGHLIN BRUSHES UP ON ACHILL.(Features)
Newspaper article from: The Mirror (London, England); 11/13/2004; 700+ words
; ...O'Dalaigh School of Painting close to Achill Island with a stopover in Westport about 25 miles from Achill. First stop was the Atlantic Coast Hotel...away in a sheltered sea inlet on the main Achill Road. The school is run by Joe Daly...
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I WAS CURED OF CANCER IN ISLAND'S HOUSE OF PRAYER; Mum-of-six claims her tumour cleared up after Achill miracle.(News)
Newspaper article from: The Mirror (London, England); 8/24/2002; 700+ words
; ...went to see healer Christina Gallagher on Achill Island off Co Mayo. She had a tumour...decided to go with my husband Donal to Achill. "I was so sick it took us three days...had never met her before that. I left Achill that day and felt a great sense of peace...
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TREASURE ISLAND; Who's won the pounds 5.2m Lotto? Is it a Dublin family visiting Achill or is it a local trying to fool us all?(News)
Newspaper article from: The Mirror (London, England); 8/23/2002; 700+ words
; ...25million Lotto jackpot - but who? Some on Achill Island, off Co Mayo, say it was a family...them. "We must be the luckiest store on Achill Island - we had a pounds 2.5million...family of eight who had been visiting Achill were the winners. John O'Malley said...
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Achill
Book article from: The Columbia Encyclopedia, Sixth Edition
Achill [Irish,=eagle], island, 56 sq mi...connected with the mainland by a bridge over Achill Sound. The rugged island is barren; there...Keel and Doogort are the chief towns. Achill is known for its magnificent cliffs; Slievemore...
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Fintan mac Bóchra
Book article from: A Dictionary of Celtic Mythology
...another story Fintan details in a dialogue with the hawk of Achill how he escaped the Flood. He had been 15 years old at the coming...ed.), ‘Colloquy between Fintan and the Hawk of Achill’, in Anecdota from Irish Manuscripts , i, ed...
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Ireland
Book article from: The Columbia Encyclopedia, Sixth Edition
...affording many natural harbors. Off the west coast are numerous small islands, including the Aran Islands , the Blasket Islands , Achill , and Clare Island . The interior is dotted with lakes (the most celebrated are the Lakes of Killarney ) and wide stretches...
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Norton, Jim 1938–
Book article from: Contemporary Theatre, Film and Television
...syndicated, 1991. Roger Havering, "The Mystery of Hunter's Lodge," Poirot, ITV, 1991. Sean Quinn, "The Sisters of Achill," Star Lucky, YTV, 1991. Henderson, "A Diminished Rebecca with a Suspended Cliff," Cheers, NBC, 1992. Dr. Bresselles...
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eagle
Book article from: A Dictionary of Celtic Mythology
...eagle, often in a series of transformations; the transformation into a salmon usually follows. In Irish folklore the hawk of Achill tricks an eagle by sending it on a fruitless errand while the hawk eats the eagle's chicks. The eagles of Snowdonia (W Eryri...
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