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25 Circulation 2 - SI Leader Anita Vijapura Spring 2010...

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SI Leader: Anita Vijapura Spring 2010 BSC2011 1/22/10-1/25/10 Circulation Part 2 Blood flow velocity and blood pressure are controlled by __________________________ and _______________________________. Define peripheral resistance: Determine the relationship between peripheral resistance and the radius of the blood vessel [which blood vessel(s)?]: Nervous Control The neural system which act on _____________ muscle to control blood vessel diameter is called the _______________________________. It is located in the _______________________________. This system consists of two (sub)systems: 1) 2) How are these (sub)systems activated? 1) 2)
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SI Leader: Anita Vijapura Spring 2010 BSC2011 1/22/10-1/25/10 Hormonal Control Hormone Vasoconstrictor/ Vasodilator Molecule Source Action/Stimulation Vasopressin Vasoconstrictor Peptide Pituitary Gland Released when baroreceptors sense fall in BP Angiotensin Vasoconstrictor Peptide Liver Stimulated by kidney when senses fall in BP Endothelin Vasoconstrictor Peptide Endothelium Released after vascular damage to prevent blood loss Atrial Natriuretic Peptide Vasodilator Peptide Heart; Endothelium Released due to increased
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