USGS Map: Chinook Pass 7 1/2. Chinook Pass Falls is located near Tipsoo Lake on the east side of Mount Rainier National Park. From the junction of Highways 410 and 123 at Cayuse Pass, follow Highway 410 east toward Chinook Pass and Yakima for just over a mile and park in the small pull out at the first switchback.
Constriction of blood vessels means that there is less heat radiated to the environment. This is why prolonged cold can lead to frostbite- the fingers and toes don't get enough blood sent to them and the tissues begin to die. Blood vessels dilate to radiate heat to the environment. Due to Homeostasis (maintanance of the internal environment) when your too cold, your blood vessels constrict to preserve heat which makes blood flow slower. when your warm, your blood flows better and mroe heat is released.
Hemostasis occurs when blood is present outside of the body or blood vessels. It is the instinctive response for the body to stop bleeding and loss of blood. During hemostasis three steps occur in a rapid sequence. Vascular spasm is the first response as the blood vessels constrict to allow less blood to be lost.. Vascular spasm-Damaged blood vessels constrict. Vascular spasm is the blood vessels' first response to injury. The damaged vessels will constrict (vasoconstrict) which reduces the amount of blood flow through the area and limits the amount of blood loss.