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What effect does local heat application have on blood vessel diameter?
Vasodilation or enlargement of the blood vessel
What effect does vasodilation have on blood pressure?
Vasodilation typically leads to a decrease in blood pressure. This is because when blood vessels dilate, their diameter increases, allowing more blood to flow through them with less resistance, reducing the pressure on the vessel walls.
What is the increase of diameter in a blood vessel called?
Vasodilation: Widening of blood vessels resulting from relaxation of the muscular wall of the vessels. What widens is actually the diameter of the interior (the lumen) of the vessel. The opposite of vasoconstriction.
Which would have the greater effect on vascular resistance?
Vasoconstriction would have a greater effect on increasing vascular resistance compared to vasodilation. When blood vessels constrict, their diameter decreases, leading to increased resistance to blood flow. Conversely, vasodilation results in an expansion of blood vessel diameter, reducing resistance.
Does the sympathetic nervous system cause vasodilation?
Yes, the sympathetic nervous system can cause vasodilation through the release of certain neurotransmitters that relax the smooth muscles in blood vessel walls, allowing them to widen and increase blood flow.
How does sympathetic activation affect blood vessel diameter, leading to either vasodilation or vasoconstriction?
Sympathetic activation can cause blood vessels to either dilate (vasodilation) or constrict (vasoconstriction) by releasing neurotransmitters that bind to receptors on the blood vessel walls. When the sympathetic nervous system is activated, it releases norepinephrine, which can bind to alpha-adrenergic receptors on blood vessels, causing them to constrict and decrease blood flow. Alternatively, the release of epinephrine can bind to beta-adrenergic receptors, leading to vasodilation and an increase in blood flow.
Widening of the blood vessels as occurs during exercise is termed?
This is called vasodilation. This is easy enough to remember: "vaso" means "blood vessel"; "dilation" means "to widen".
Decreased peripheral resistance to blood flow?
Decreased peripheral resistance to blood flow is typically associated with vasodilation, which occurs when the smooth muscle in blood vessel walls relaxes. This can lead to increased blood flow to tissues and decreased blood pressure. Vasodilation can be caused by factors such as the release of nitric oxide or certain medications.
What is the proper term for blood vessels getting larger in diameter?
This is called vasodilation. Vaso meaning vessel and dilation meaning getting wider.
Which changes in paracrines cause vasodilation?
Changes in paracrines, such as an increase in nitric oxide or prostacyclin release, can cause vasodilation by relaxing the smooth muscle in blood vessel walls and increasing blood flow. These molecules act locally to dilate blood vessels in response to certain stimuli like exercise or inflammation.
What does the root vaso mean?
The root "vaso" means vessel or duct. It is commonly used in medical terms related to blood vessels, such as vasodilation (widening of blood vessels) or vasoconstriction (narrowing of blood vessels).
How does the sympathetic nervous system regulate blood flow through the process of vasodilation or vasoconstriction?
The sympathetic nervous system regulates blood flow by causing either vasodilation (widening of blood vessels) or vasoconstriction (narrowing of blood vessels). When activated, the sympathetic nervous system releases norepinephrine, which binds to receptors on blood vessels. This can either relax the smooth muscle in the vessel walls, causing vasodilation and increased blood flow, or contract the smooth muscle, leading to vasoconstriction and decreased blood flow.
