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

KIN 3600

Lec 18

TermDefinition
Osteotendinal junction bone & tendon junction
Myotendinal Junction muscle & tendon junction
Tendons fusion of all 3 C.T. together @ the 2 distal ends of the muscle forms tendons which becomes continuous with periosteum
Sarcolemma (plasmalemma) -Phospholipid bilayer with imbedded proteins -Thickness 7.5 nm -Highly folded
Sarcosol Liquid portion of cell/plasma
Sarcoplasm Whatever is inside membrane Sarcolemme+sarcosol=sacoplasma
Myofibrils -Longitudinal, vertical densely packed individual fibers -Diameter: 1-3mm
I-band -Isotropic -Light & uniform
A-band -Anisotropic -Dark & dense
Sarcomere -Located between two adjacent z-discs -Contractile unit of myofibrils -Series arrangement & parallel arrangement
Series arrangement ^ range & velocity of contraction
parallel arrangement ^ Force of contraction
H-zone Hellerscheibe (German) Middle of A-band
M-line -Mittelscheibe -Middle H-zone
Z disc Center of each I-band
Thick filament -Myosin protein -Organized antiparallel (HEADS ON BOTH SIDES) (Tails twist together ) -Heads contain ATP & Actin -Chemical energy is immediately converted to mechanical energy (Moves myosin head)
Thin filament Actin - contractile protein G-actin -Globular protein attach to each other (beads) F-actin - G-actin side by side (necklace)
Troponin I binds to actin
Troponin T Binds to tropomyosin
Troponin C Binds to calcium
Thick & thin filaments interdigitate in a hexagonal array 1 Thick: 6 Thin
Mechanism of muscular contraction Thin pulled/slides over thick filaments
What happens to I-band during muscle fiber shortening? narrows & disappears
What happens to A-band during muscle fiber shortening? remains the same length
What happens to H-zone during muscle fiber shortening? narrows, disappears, reappears darker color because of over lapping & becomes a wider zone
Created by: rmart11