cardiac muscles excitation contraction coupling
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11 Terms
excitation
involves AP conduction
contraction
involves presence of ca+
AP’s are conducted along where
the sarcolemma
sarcolemma → T tubules
@ T Tubules they activate & open DHP receptors
what are DHP receptors at the skeletal muscle called
L-type Ca++ channels
open DHP Receptor
allows external ca+ intro cardiac cell
external ca+ in cardiac cell
activates ryanodine receptors type 2
DHP receptors and ryanodine receptors
not directly connected
(not coupled)
ryanodine receptors activated from external Ca+ is described as what
calcium-induced calcium release
Ca++ from SR
binds to troponin which stimulates cardiac muscle contraction
difference of R receptor activation in skeletal muscle and cardiac muscle
skeletal muscle: DHP directly opens R receptor
cardiac muscle: external Ca++ from DHP directly opens the R receptor
Note 
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