Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Epinephrine at Work

How epinephrine/norepinephrine work on cardiac mysoties themselves

QuestionAnswer
STEP 1 Binding of epinephrine/norepinephrine changes shape of beta receptor -> activates G-Protein
STEP 2 G-Protein subunit activates adenylate cyclase
STEP 3 Adenylate cyclase catalyzes conversion of ATP to cAMP
STEP 4 cAMP activates protein kinase A
STEP 5 Protein kinase phosphorylates Calcium channels, influx on calcium in cell, stimulates contraction
STEP 6 protein kinase also phosphorylates calcium channels on sarcoplasmic reticulum. calcium then moves into the cytoplasm and stimulates contraction.
STEP 7 Protein kinase phosphorylates myosin, stimulates contraction
STEP 8 Protein kinase phosphorylates sarcoplasmic Calcium ATPase -> speeds removal of calcium from cytoplasm during relaxtion. decreases over relaxtion time.
Created by: zeenat