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Cardiovascular (Circulatory Physiology (Vascular resistance (*vascular…
Cardiovascular
Vessels
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3 layers of the walls
2
tunica media
middle layer
smooth muscle, in frame work of collagen fibers and elastic fibers
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Baroreceptors
- monitor the degree of stretch in the expandable organs
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Circulatory Physiology
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Turbulaence
- blood flows through a vessel smoothly
- with the slowest flow near the walls
*fast in the center
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Autoreguulation
- change in tissue conditions act directly on precapillary sphincters to alter peripheral resistance
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Neural Mechanisms
- respond to changes in arterial pressure or blood gas levels at specific sites
- automomic nervous system adjusts cardiac output and periphaeral resistance to maintain adequate blood flow
Endocrine mechanisms
- releases hormones that enhance short term adjustments
- directs long term changes in Cardiovascular performance
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