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  2. Vasoconstriction - Wikipedia

    en.wikipedia.org/wiki/Vasoconstriction

    Vasoconstriction is the narrowing of the blood vessels resulting from contraction of the muscular wall of the vessels, in particular the large arteries and small arterioles. The process is the opposite of vasodilation , the widening of blood vessels.

  3. Hemostasis - Wikipedia

    en.wikipedia.org/wiki/Hemostasis

    In biology, hemostasis or haemostasis is a process to prevent and stop bleeding, meaning to keep blood within a damaged blood vessel (the opposite of hemostasis is hemorrhage). It is the first stage of wound healing. Hemostasis involves three major steps: vasoconstriction; temporary blockage of a hole in a damaged blood vessel by a platelet plug

  4. Vasomotor - Wikipedia

    en.wikipedia.org/wiki/Vasomotor

    The smooth muscle cell membranes have α and β-adrenergic receptors for these neurotransmitters. Activation of α-adrenergic receptors promotes vasoconstriction, while the activation of β-adrenergic receptors mediates the relaxation of muscle cells, resulting in vasodilation. Normally, α-adrenergic receptors predominate in smooth muscle of ...

  5. Ischemia - Wikipedia

    en.wikipedia.org/wiki/Ischemia

    [5] [6] It also implies local hypoxia in a part of a body resulting from constriction (such as vasoconstriction, thrombosis, or embolism). Ischemia causes not only insufficiency of oxygen, but also reduced availability of nutrients and inadequate removal of metabolic wastes. [7] Ischemia can be partial (poor perfusion) or total blockage. The ...

  6. Angiotensin - Wikipedia

    en.wikipedia.org/wiki/Angiotensin

    Angiotensin is a peptide hormone that causes vasoconstriction and an increase in blood pressure. It is part of the renin–angiotensin system, which regulates blood pressure. Angiotensin also stimulates the release of aldosterone from the adrenal cortex to promote sodium retention by the kidneys. An oligopeptide, angiotensin is a hormone and a ...

  7. Infarction - Wikipedia

    en.wikipedia.org/wiki/Infarction

    Infarction occurs as a result of prolonged ischemia, which is the insufficient supply of oxygen and nutrition to an area of tissue due to a disruption in blood supply.The blood vessel supplying the affected area of tissue may be blocked due to an obstruction in the vessel (e.g., an arterial embolus, thrombus, or atherosclerotic plaque), compressed by something outside of the vessel causing it ...

  8. Blood vessel - Wikipedia

    en.wikipedia.org/wiki/Blood_vessel

    Vasoconstriction is the constriction of blood vessels (narrowing, becoming smaller in cross-sectional area) by contracting the vascular smooth muscle in the vessel walls. It is regulated by vasoconstrictors (agents that cause vasoconstriction).

  9. Coagulation - Wikipedia

    en.wikipedia.org/wiki/Coagulation

    Coagulation, also known as clotting, is the process by which blood changes from a liquid to a gel, forming a blood clot.It results in hemostasis, the cessation of blood loss from a damaged vessel, followed by repair.