Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

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.
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.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
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

NRTC Muscular System

Ch. 9, shuffle before use...BH

3 Types of muscle smooth, cardiac, skeletal
What is a Muscle Fiber a single muscle cell
What is Endomysium it coats the muscle fiber, help give it support
What are Fascicles groups of muscle fibers
What is the Perimysium outer layer that wraps around Fascicles
What is Epimysium A tissue that wraps groups of Fascicles together
Sacrolemma like plasma membrane for muscle fibers
Sarcoplasm like the cytoplasm for muscle fibers
Sarcoplasmic Reticulum Where calcium is stored
Consists of thick Filaments (myosin) and thin Filaments (actin) Myofilaments
What is required for muscles to move? ATP (energy)
The connection between a motor nueron and a muscle fiber is called a nueromuscular junction
When an impulse reaches the end of a motor neuron, it causes the release of acetylcholine (ACh)
ACh is known as a neurotransmitter
Continuous state of partial muscle contraction is called Muscle tone
What causes muscle tone? posture, standing, holding your head up
What is a motor unit? A neuron and all the fibers it stimulates.
What factors affect muscle Contraction? Frequency of stimuli, strength of nerve signals, and type of contraction.
Isometric contraction muscle length does not change
isotonic contraction lifting and changing muscle length
prime mover The muscle that triggers a movement
end of muscle that attaches to more stable bone origin
end of muscle that attaches to more freely moving bone insertion
muscle that assist the prime movers synergists
balances the use of a muscle antagonists
Created by: anyconda



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:
restart all cards