epinepherine will constrict tiny blood vessels.
No, oxygen does not dilate blood vessels. In fact, oxygen has a vasoconstrictive effect, which means it causes blood vessels to constrict or narrow. This helps regulate blood flow and pressure in the body.
Nitroglycerin is not an antagonist. It is a medication that works by releasing nitric oxide, which causes relaxation of blood vessels and improves blood flow.
Blood vessels in the brain of a cocaine user will narrow so that means the vessels contract.
Narrow
Vasodilation is normal increase in the diameter of a blood vessel. Aneurysm is a localized ballooning of a blood vessel.vasodilation.VasodilationAngioplasty and dilatation or if open surgery the suffix -plasty is used for the vessel for which the widening was done
vasoconstrictor
Histamine causes the dilation of the small blood vessels while constrict the large blood vessels.
When the heart beats it causes blood to flow through the blood vessels which causes them to expand. This expansion can be felt by touching the vessels that are close to the skin.
nitroglycerine
The culprits in emphysema are ANY lung irritants; smoke is just one type of irritant. In emphysema, the irritation causes some alveoli to collapse.In blood vessel disorders, like atherosclerosis, smoking can make blood thicker and "stickier", which causes narrowing of blood vessels as RBC and debris clog the vessels.
Capillaries. They're so small that red blood cells are sometimes forced to travel single-file.
Angiotesin is a group of pepticides tha act as vasoconstrictor to narrow blood vesselsAn angiotensin is any of several polypeptides which narrow blood vessels and regulate arterial pressure.