Cardiac muscle

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(Created page with "Cardiac Muscle cells are striated, just as in skeletal muscle and is found only in the heart. It works on a rhythmn set by a group of pacemaker cells locted in the right atrium o...")
 
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The Pacemaker releases an electrical impulse approximately 70 times per minute, which causes the heart to contract. The signals are sent via the involuntary nerves from the cardia control centre loacted in the medulla of the brain.  
 
The Pacemaker releases an electrical impulse approximately 70 times per minute, which causes the heart to contract. The signals are sent via the involuntary nerves from the cardia control centre loacted in the medulla of the brain.  
  
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The rate of impulses can be increased by the cardiac accelerator nerve, or by the hormone adrenalin.  
The rate of impulses can be increased by the cardiac accelerator nerve, or by the hormone adrenalin.
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The rate of impulses can be decreased by the cardiac depressor nerve.  
 
The rate of impulses can be decreased by the cardiac depressor nerve.  
  
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<references />
  
<references />
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<ref>http://www.bbc.co.uk/science/humanbody/body/factfiles/skeletalsmoothandcardiac/heart_beat.shtml fckLR1/12/2011</ref> BBC.co.uk
  
<ref>http://www.bbc.co.uk/science/humanbody/body/factfiles/skeletalsmoothandcardiac/heart_beat.shtml
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IB Biology Higher Level Revision Guide 2009 syllabus
1/12/2011</ref>
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<ref>IB Biology Higher Level International Baccalaureate Revision Guide 2009 Syllabus
 
 
Ashby Merson-Davies
 
Ashby Merson-Davies
Oxford Study Courses</ref>
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Oxford IB Revision Guides
 +
 
 +
2007

Revision as of 22:41, 1 December 2011

Cardiac Muscle cells are striated, just as in skeletal muscle and is found only in the heart. It works on a rhythmn set by a group of pacemaker cells locted in the right atrium of the heart. This self-automated contraction property is called being 'myogenic'.

The Pacemaker releases an electrical impulse approximately 70 times per minute, which causes the heart to contract. The signals are sent via the involuntary nerves from the cardia control centre loacted in the medulla of the brain.


The rate of impulses can be increased by the cardiac accelerator nerve, or by the hormone adrenalin.

The rate of impulses can be decreased by the cardiac depressor nerve.



[1] BBC.co.uk

IB Biology Higher Level Revision Guide 2009 syllabus

Ashby Merson-Davies

Oxford IB Revision Guides

2007


Cite error: <ref> tags exist, but no <references/> tag was found
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