ATP usage in Actin Myosin contraction - USMLE Forums
USMLE Forums Logo
USMLE Forums         Your Reliable USMLE Online Community     Members     Posts
USMLE Articles
Go Back   USMLE Forums > USMLE Step 1 Forum

USMLE Step 1 Forum USMLE Step 1 Discussion Forum: Let's talk about anything related to USMLE Step 1 exam

Thread Tools Search this Thread Display Modes
Old 07-17-2014
USMLE Forums Addict
Steps History: 1+CK+CS
Posts: 148
Threads: 37
Thanked 73 Times in 57 Posts
Reputation: 83
Default ATP usage in Actin Myosin contraction

I am having doubt reg How many ATPs are consumed per cycle of myocyte contraction....I think its 2 ATP per cycle...My understanding is

1.One ATP is used for detachment of Myosin head and hydrolysis of that ATP into ADP and Pi reactivates the myosin head for the next cycle

2.Second ATP is used in pumping back the calcium ions into sarcoplasmic reticulum....this leads to relaxation of the sarcomere..

Can some tell me if i am correct
Reply With Quote Quick reply to this message


Quick Reply

Register Now

In order to be able to post messages on the USMLE Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Medical School
Choose "---" if you don't want to tell. AMG for US & Canadian medical schools. IMG for all other medical schools.
USMLE Steps History
What steps finished! Example: 1+CK+CS+3 = Passed Step 1, Step 2 CK, Step 2 CS, and Step 3.

Choose "---" if you don't want to tell.

Favorite USMLE Books
What USMLE books you really think are useful. Leave blank if you don't want to tell.
Where you live. Leave blank if you don't want to tell.


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Atp production johnvega98 USMLE Step 1 Forum 1 03-24-2012 06:07 PM
ATP problem USMLEBoy USMLE Step 1 Forum 2 09-22-2011 12:14 AM
Action of Myosin and Actin Video Animation! rulz USMLE Step 1 Forum 2 09-16-2011 08:49 PM
Why do we need ATP from Gluconeogenesis? usluipek USMLE Step 1 Forum 7 05-21-2011 03:52 PM
Actin Myosin EM Image Question Sabio USMLE Step 1 Forum 4 12-17-2009 06:39 AM

RSS Feed
Find Us on Facebook
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.

USMLE® & other trade marks belong to their respective owners, read full disclaimer
USMLE Forums created under Creative Commons 3.0 License. (2009-2014)