myocytes, which of these downstream activities WOULD NOT occur when norepinephrine binds to the B, receptors of that cell? Answers A- D PK-A phosphorylates the L-type Ca" channels increasing Ca influx into the cell. B More Ca" is released into the cytoplasm from the sarcoplasmic reticulum because of calcium induced calcium release. PK-A phosphorylates phospholamban which then inhibits the reuptake of Ca" back into the sarcoplasmic reticulum. D PK-A phosphorylates the regulating proteins on troponin so that troponin will release Ca" quicker.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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For cardiac myocytes, which of these downstream activities WOULD NOT occur when norepinephrine binds to the B, receptors of that cell?
Answers A - D
A PK-A phosphorylates the L-type Ca" channels increasing Ca" influx into the cell.
B
More Ca" is released into the cytoplasm from the sarcoplasmic reticulum because of calcium induced calcium release.
PK-A phosphorylates phospholamban which then inhibits the reuptake of Ca" back into the sarcoplasmic reticulum.
D.
PK-A phosphorylates the regulating proteins on troponin so that troponin will release Ca" quicker.
Transcribed Image Text:For cardiac myocytes, which of these downstream activities WOULD NOT occur when norepinephrine binds to the B, receptors of that cell? Answers A - D A PK-A phosphorylates the L-type Ca" channels increasing Ca" influx into the cell. B More Ca" is released into the cytoplasm from the sarcoplasmic reticulum because of calcium induced calcium release. PK-A phosphorylates phospholamban which then inhibits the reuptake of Ca" back into the sarcoplasmic reticulum. D. PK-A phosphorylates the regulating proteins on troponin so that troponin will release Ca" quicker.
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