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TABLE VIII. THE EFFECTS OF ACETYLCHOLINE, ADRENALIN ~LND ESERINE ON ASCIDIAN HEARTS
IS
speciee
Acetykholin
Adrenalin
Eserine
Technique
Author
Ciona intestinali.9 ,
S o response
S o response
X o response
Whole heart
Bncq (1034a, 1935a)
C'. intestinalis
Mild scccleration a t -
10 - 6 g/ml.
In high conc.
depresses activity
X o effect and does Intact ligatured
Krijgsman and
not potentiate
hearts
K r i j p a n (1959)
effect of Ach.
C . intestinalis
No effect
Increased frequency -
(lo-* g/ml)
C'. ititestinalis
C . inte.dnalis
Perophwcl riridia
Stops heart
Stops heart
-
temporarily at
temporarily a t
conc. loT8 ghd.
10-5 g!ml.
Blocked by
Increased frequency
atropine
at lO-*g/ml
-
Decreased frequency -
Whole hearts:
Scudder el al.
recording from
(1963)
pericardiuin
Slit hearts
Iiriebel (1 968d)
Whole heart
Keefner and Akers
(1971)
Enhances
Enhances
Enhances
Whole heart
Waterman (1942.
abvisceral
abvisceral
abvisceral
1943)
dominance
dominance
dominance
Potentiates effect Whole nnimnl
Ebara (1953a)
of acetylcholine