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Briefly, it means when the blood vessels of the body dialate (get larger in diameter).
Wiki User
∙ 16y ago
Wiki User
∙ 15y agoVasodilation is dilatation of the blood vessels, as by the action of a nerve. See "Related Links" below for a Dictionary Definition.
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What is a vascular effect of histamine released from mast cells?
vasodialation
Why is osmotic pressure low in someone who is having an allergic reaction?
Looks like someones taking Bio 20 hahahah Histamines, a vasoactive chemical, causes peripheral vasodialation of the capillaries.
What is the medical term meaning around a vessel?
vascular- pertaining to vesselsarterial- pertaining to arteriesvenous- pertaining to veinsVery simple...it is "vaso". As in vasodialation or vasoconstriction.
How is blood pressure maintained while the heart is not contracting?
1. The heart is always contracting. 2. Our Cardiovascular System has these nifty one way valves to prevent backflow (SO blood cannot flow backwards only forward. 3. Vasoconstriction vs. Vasodialation. Vasoconstriction is when the arteries and veins in your vascualr system get smaller in radius. Vasodialtion is the opposite. This helps in maintaining accuarate blood pressure. Without heart contraction, there is no blood pressure
Aspirin in connection with roses?
In theory aspirin should work because it acidifies thewater enough to prevent the growth of bacteria in the water, which inreases the longevity but the change is too minorIN ADDITION:Just as aspirin makes a headache go away by making the blood vessels dialate by vasodialation, it also makes the fluid pathways from the lower portions of the stem dialate and allow fluids to pass upwards to the leaves and flowers. Therefore the upper parts of the cut flower get more water, stays hydrated and keeps its color longer. Jacore,Jazmine
Why does redistribution of blood flow happen?
While a person is exercising, the body must adjust to send extra blood to working muscles. When this adjustment takes place, blood must be redirected from somewhere else in the body. During rest only 15-20% of the cardiac output of the heart goes to the skeletal muscles, but during exercise, that number reverses with the other areas of the body, feeding the muscles nearly 85% of the total output of the heart. Muscles like the kidney, brain, and liver eat up nearly 65% of the total blood flow at rest!When exercise is light, blood flow to the skin increases to compensate for a change in body temperature. This percentage decreases when exercise gets heavier to send more blood to the muscles.The heart generally receives around 4% regardless of the body being in exercise. Blood flow to the brain increases slightly, as the brain cannot have a decrease in blood flow over several seconds without fainting.Because our body has a parallel circulatory system, blood flow can be redistributed where needed. Because of vasodialation, a decrease in radius, and vasoconstriction, an increase in radius, the vessels leading to a particular organ or tissue area change diameter depending on where blood is needed in the body. Blood flow into a capillary bed depends on the vasodialation or vasoconstriction of the arteriole supply. Inside the capillary bed are muscular rings called precapillary sphincters have increase or decrease the diameter of the vessel and control the flow of blood into the bed.The body has an amazing way of keeping itself running, literally!
What are the steps in the inflammatory process?
1. Vasodialation and increased permeability of vessels:Caused by histamines from mast cells, kinins from precursors in the blood, prostoglandins from damages cells and leukotrienes from basophils and mast cells.Blood flow increases, extra clotting factors, antibodies localize.2. Phagocyte Emigration:Occurs within one hour, neutrophils and then monocytes arrive and leave the blood stream(emigration) as a result of chemotaxis.3. Initiation of Tissue Repair:Neutrophils and macrophages (short life span) die and form pus. This begins the tissue repair process. Pus eventually drains.
What does founder mean for a horse?
Founder is the common term for acute (recent) pain and inflammation in the hooves. It is often a result of eating too rich of feed too quickly, such as when a horse breaks into the grain room and gorges on sweet feed. The inflammation causes the sensitive lamina (soft tissue structures that hold the tough hoof wall onto the bone of the hoof) to swell and then become damaged or die. This can result in anything from mild damage to the hoof wall to a complete loss of the hoof necessitating euthanasia for humane reasons.
Nursing interventions for high blood pressure?
Treatment and interventions are usually based on the cause of the shock. Most of them are caused by either vasodialation or fluid loss that causes lowered Cardiac Output. For Hypovolemic, you would want to focus on increasing Cardiac Output by giving positive inotropes like dobutamine, dopamine, and also replacing fluids (Using only NS and LR; never D5W; it will only exacerbate the possible lactic acidosis). Also, you would replace what the patient lost (plasma, RBC, etc.) For neurogenic, it is a wide-spread loss of sympathetic nervous system tone, so you would focus on vasoconstriction with medications like Norepinepherine and Dopamine. With anaphylatic shock, epinepherine is the choice drug and removing exposure to the allergen. Cardiogenic is slightly different. It is caused from a mechanical problem in the heart. Causes could by an acute MI, cardiomyopathies, and dysrrhythmias. Treatment is focused on treating the underlying cause. You would give dopamine to correct the decreased Cardiac Output. With cardiogenic shock, however, there is increased Left Ventricular work-load. The focus would also be in correcting this by decreasing the work-load; Nitroglyerine or Nitroprusside is given along with the positive inotrope.
Which body systems would be most involved in ridding the body of the bacteria?
The immune system. The first line of defence such as skin, mucus, and hair around entrences stop bacteria from entering your body. Additionally, tears from the eye wash away bacteria, ear wax stops bacteria in its path, and saliva has anti-bacterial properties in it. There are also cells with cilia in your throat which sweep the bacteria out of your mouth when you cough. The second line of defence is known as 'inflammation'. When the bacteria gets past your first line of defence, the second comes in. For example, when you accidently cut yourself, the sharp object probably has lots of bacteria on it. To fight this, your body sends a rush of blood to the area. Your white blood cells have the main job here. Macrophanges (a type of white blood cell) like phagocytes engulf the harmful bacteria and destroy and digest it usung lysosomes. Symptoms such as pain, swelling and fever are not actally because of the bacteria, but because your body is fighting back. When the blood is being rushed to the area, your blood vessels become bigger (vasodialation) causing swelling. The pinching and stretching also causes the pain. The third line of defence is the last and most powerful one of all. This line is usually for viruses, but can also be used on bad bacteria. It remembers the structure of the pathogen and can act fast when it strickes again. Other white blood cells called lymphocytes are activated. There are generally two types of lymphocytes: B cells and T cells. When a pathogen comes into the third line of defence, the B cells are activated. On the end of a B cell, there are antibodies. On the end of a pathogen, there is an antigen. B-cells all have different shaped antibodies and only one can attach onto the antigen of a pathogen. When the B-cells do find the right antibody, the T helper cells help it to reproduce millions of the same antibodies so that it can fight the pathogen (which meanwhile, was also reproducing). Most of these antibodies become plasma B-cells, which are used to kill the pathogen, however, others become memory B cells, which say in your body years. In case the pathogen strikes again, the memory B cells will know. There are also cytotoxic T cells which kill cells that have been infected. The lymphatic system also has a part. Basically, the blood vessels carry the pathogen to lymph nodes, which are at different places in your body, and store them. When your doctor checks for infections, they might prod the place just under your cheek, near your ear, where a pair of lymph nodes are. By the way, when you are vaccinated, a fragment of the virus is insered into your bloodstream and it triggers your B cells to reproduce. Those memory cells will stay, and you will be immune. The symptoms tha some people get is when it aso triggers the second like of defense. Hope I helped :) - Apoorva M
