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Dictionary » S » Sarcomeres

Sarcomeres

sarcomeres

The repeating contractile units of the myofibril, delimited by z bands along its length.


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Since each myofibrill is attached at either end of the.....

Myofibrils are just organelles within muscle cells that contain sarcomeres, which are the basic unit of muscle fibres. They span the entire length of muscle cells and are made of contractile actomyosin that allows them to contract. When a large number of ...

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by Babybel56
Sat Apr 23, 2011 7:30 pm
 
Forum: Human Biology
Topic: Since each myofibrill is attached at either end of the.....
Replies: 1
Views: 5081

Help with the Heart!!

... arteries, or the coronary sinus? 3) The myocardium does not contain which of the following: intercalated discs, conduction (Purkinje) fibers, sarcomeres, visceral pericardium, trabeculae carne I am pulling my hair out with these three. I will try to get the multiple choice options for the ...

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by amanderkinz
Mon Feb 28, 2011 3:04 am
 
Forum: Physiology
Topic: Help with the Heart!!
Replies: 2
Views: 3737

MOTOR PROTIENS

look it up? Myosin, tropomyosin, and the like? Look up sarcomeres.... etc.

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by plasmodesmata11
Wed Mar 25, 2009 2:55 am
 
Forum: Cell Biology
Topic: MOTOR PROTIENS
Replies: 1
Views: 1855

HELP wtih ATP!!!!

Myosin changes it's shape when it binds to ATP, making it able to detach from actin and move forward => sarcomeres shorten => contraction

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by MrMistery
Wed Dec 05, 2007 1:32 pm
 
Forum: Physiology
Topic: HELP wtih ATP!!!!
Replies: 3
Views: 3778

Re: Q's-Can someone please check my answers

... about muscle fibres are TRUE? 1-When a sarcomere contracts, the width of the A-band remains unchanged. 2-When a muscle contracts, the width of the sarcomeres shrink, and the length of the myofibrils decreases. 3-The length of the thick filaments in a sarcomere corresponds to the width of the A-band. ...

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by ComputerStud
Wed May 31, 2006 2:25 am
 
Forum: Physiology
Topic: Q's-Can someone please check my answers
Replies: 4
Views: 8482
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