Vasoconstriction means the constriction of blood vessels.
Vasodilation means there is more banter swag in the penis
No, sympathetic activity typically causes vasoconstriction, not vasodilation.
Vasodilation is relaxation of blood vessels leading to increase in lumen size. Vasoconstriction is contraction of blood vessels leading to decrease in lumen size.
Yes, the veins have the ability to go through the vasoconstriction and vasodilation. This also applies to the other elastic tubular channels like the capillary and the arteries.
Never. Unless you're bleeding, but if you're bleeding the body will undergo vasoconstriction not vasodilation so the answer is never.
Sympathetic vasoconstriction decreases blood flow by narrowing blood vessels, while sympathetic vasodilation increases blood flow by widening blood vessels.
The sympathetic nervous system primarily causes vasoconstriction in the body.
Sympathetic stimulation causes vasoconstriction of most arterioles in the body, except for arterioles in skeletal muscle and the heart where it causes vasodilation.
Vasodilation is primarily caused by factors like nitric oxide, prostaglandins, and certain medications like calcium channel blockers. On the other hand, vasoconstriction is mainly brought about by substances such as endothelin, angiotensin II, and sympathetic nervous system activation through norepinephrine release.
Vasodilation and vasoconstriction occur in a cycle to regulate blood flow and maintain homeostasis in the body. Vasodilation refers to the widening of blood vessels, which allows for increased blood flow and delivery of oxygen and nutrients to tissues. Vasoconstriction, on the other hand, is the narrowing of blood vessels, which reduces blood flow and conserves heat and nutrients. These processes are dynamically regulated based on various factors such as tissue oxygen levels, metabolic demands, and body temperature.
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.
LUNGS
The nervous system's ability to trigger vasoconstriction and vasodilation affects the body's physiological response by regulating blood flow. Vasoconstriction reduces blood flow, increasing blood pressure and redirecting blood to vital organs during stress or cold. Vasodilation increases blood flow, helping to cool the body and deliver nutrients during exercise or relaxation. These responses help maintain homeostasis and support various bodily functions.