Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


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. Your email address is only used to allow you to reset your password. See 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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

B3:3. Muscles and Mo

QuestionAnswer
The basic unit of muscles is the sarcomere
The 2 basic types of protein filaments in muscle are: Actin: The thin filament. Myosin: The thick filament.
Which protein filaments are anchored at the Z line? Actin filaments
When a sarcomere contracts which protein moves and which stays stationary? Moves: The Actin filaments slide toward the center of the sarcomere. Stays Stationary: The Myosin filaments remain stationary.
Describe how a muscle contracts including roles of: Myosin head, ATP Hydrolysis, Muscle contraction follows a specific cycle often called the "Cross-bridge cycle": ATP Hydrolysis: ATP binds to the Myosin head and is hydrolyzed into ADP and phosphate, "cocking" the head into a high-energy state.
Describe how a muscle contracts including roles of: ...Actin, Cross-bridge formation... Cross-bridge formation: The energized Myosin head binds to a specific site on the Actin filament. Flexion (Power Stroke): The Myosin head releases the ADP and phosphate, causing it to flex and pull the Actin filament toward the center of the sarcomere.
Describe how a muscle contracts including roles of: .. Cross bridge breaking: A new molecule of ATP binds to the Myosin head, causing it to detach from the Actin.
The Role of Titin A massive, spring-like protein. It is attached at the Z line and extends to the M line (the center of the sarcomere), connecting to the Myosin filaments along the way.
What does Titin do during relaxation and contraction to facilitate muscle movement? During Contraction: It helps keep the Myosin filaments centered. During Relaxation: It acts like a molecular spring, providing passive elasticity that helps the sarcomere return to its original length after being stretched or contracted.
Created by: Cocoalover
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards