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Dictionary » S » Sarcoplasmic reticulum

Sarcoplasmic reticulum

Definition

noun

The special type of smooth endoplasmic reticulum found in smooth and striated muscle fibers whose function is to store and release calcium ions.


Supplement

The sarcoplasmic reticulum releases calcium ions during muscle contraction and absorb them during relaxation.


Word origin: Greek sarx = "flesh".

Compare: endoplasmic reticulum.


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Need help, research

... highly dependant on receptors (including the internal receptors on the sarcoplasmic reticulum which releases Ca(2+) into the sarcoplasm)

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by sdekivit
Sun Jul 16, 2006 6:14 pm
 
Forum: Cell Biology
Topic: Need help, research
Replies: 8
Views: 886

Calcium regulated muscle cell contraction

I know that when a muscle cell receives a signal to contract, the sarcoplasmic reticulum releases Ca++ (which then binds to tropomyosin allowing myosin head to walk up the ...

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by dae
Sat May 06, 2006 12:43 am
 
Forum: Cell Biology
Topic: Calcium regulated muscle cell contraction
Replies: 1
Views: 824

Help me please! Going mad!!

... the sarcolema causing an action potential D) Atp is released from the sarcoplasmic reticulum E) Oxygen binds to myoglobin 2. The role of Acetylcholine in skeletal muscle contractions ...

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by Jan-Jan
Tue Jan 31, 2006 5:55 pm
 
Forum: Human Biology
Topic: Help me please! Going mad!!
Replies: 6
Views: 999

Re: Special heart muscle

... units *High capillary density *Large no. of mitochondria *Large sarcoplasmic reticulum & T.Tubule system Functions: * Drives O2, glucose, amino acids, vitamins, drugs ...

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by opuntia
Fri Jul 08, 2005 12:26 pm
 
Forum: Human Biology
Topic: Special heart muscle
Replies: 1
Views: 892

sliding filamen

... filament. 3. When the contraction is completed, Ca++ is pumped back to sarcoplasmic reticulum and tropomyosin covers the actin-myosin binding site. Muscle relaxes. Thats as simple ...

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by ewokgod
Sun Jun 05, 2005 8:27 am
 
Forum: Human Biology
Topic: sliding filamen
Replies: 3
Views: 1557
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