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.

AQA A2 PE muscles

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
        Help!  

Term
Definition
Actin   The thin protein filament found in muscle cells that together with myosin form sarcomeres, the contractile units of skeletal muscle  
🗑
Adenosine triphosphate (ATP)   A high energy compound found in all muscle cells which is broken down to release energy for all purposes  
🗑
All or none law   If a motor impulse is of sufficient intensity, the motor unit is stimulated and all the muscle fibres within it will contract to their maximum possible extent  
🗑
Fasciculi   Bundles of muscle fibres that make up the muscle belly  
🗑
Fast oxidative glycolytic (FOG) muscle fibres (type 2a)   Fast twitch muscle fibres that pick up certain slow twitch characteristics so that they can withstand fatigue for longer  
🗑
Fast twitch muscle fibre   A type of muscle fibre that has a high glycolytic capacity (anaerobic). It is associated. With speed and power based activities  
🗑
Myosin cross bridge   The arm and head of the myosin filament which extends to bind on to the actin filament  
🗑
Tropomyosin   Threadlike spirals that wrap around the actin filament which covers the myosin binding site which prevents myosin attachment during the relaxed state  
🗑
Epimysium, perimysium, endomysium   Connective tissue that surrounds the muscle belly, fasciculi and muscle fibres respectively  
🗑
Motor unit   The motor nerve and the group of muscle fibres that it controls  
🗑
Myoglobin   A protein in muscle cells that stores and transports oxygen  
🗑
Myosin   The thick protein filament that together with actin form sarcomeres, the contractile units of skeletal muscle  
🗑
Sarcomere   The contractile units of skeletal muscle. They are composed of two myofilaments, actin and myosin  
🗑
Slow twitch muscle fibre   A type of muscle fibre that uses oxygen to produce energy  
🗑
Spatial summation   Controlling strength of muscle contraction; more motor units, larger motor unit, fast twtich motor units  
🗑
Troponin   A calcium receptor that sits on top of tropomyosin. In the presence of calcium it pulls tropomyosin away from the myosin binding site and allows myosin to bind to the actin filament and the sliding filament mechanism to commence  
🗑
Calcium   Has to be released to allow mysocin to attach to tropomyosin  
🗑


   

Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
 
To hide a column, click on the column name.
 
To hide the entire table, click on the "Hide All" button.
 
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
 
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.

 
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
Created by: Tina Dean
Popular Sports sets