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When overheating, the temperature of the part rises above the operating temperature. Overheating can take place: if heat is produced in more than expected amount (such as in cases of short-circuits, or applying more voltage than rated), or; if heat dissipation is poor, so that normally produced waste heat does not drain away properly.
Simplified control circuit of human thermoregulation. [8]The core temperature of a human is regulated and stabilized primarily by the hypothalamus, a region of the brain linking the endocrine system to the nervous system, [9] and more specifically by the anterior hypothalamic nucleus and the adjacent preoptic area regions of the hypothalamus.
[1] [6] Heat may increase the time when voltage-gated sodium channels are inactivated, which delays further action potentials. [ 6 ] [ 7 ] This is worsened by the demyelination caused by MS. [ 7 ] Other theories have considered the role of heat shock proteins and changes to blood flow .
An early stage of hyperthermia can be "heat exhaustion" (or "heat prostration" or "heat stress"), whose symptoms can include heavy sweating, rapid breathing and a fast, weak pulse. If the condition progresses to heat stroke, then hot, dry skin is typical [2] as blood vessels dilate in an attempt to increase
A physical exam where they look for signs of heart problems such as a: Abnormal blood flow sounds in your neck, abdomen, or groin. ... to measure the electrical activity of your heart.
Blood resistance varies depending on blood viscosity and its plugged flow (or sheath flow since they are complementary across the vessel section) size as well, and on the size of the vessels. Assuming steady, laminar flow in the vessel, the blood vessels behavior is similar to that of a pipe.
Ice and water are poured in, and the bag is zipped, with one arm hanging out so Willens can monitor the patient's blood pressure. This impromptu ice bath allows the patient to cool down rapidly ...
Cardiac physiology or heart function is the study of healthy, unimpaired function of the heart: involving blood flow; myocardium structure; the electrical conduction system of the heart; the cardiac cycle and cardiac output and how these interact and depend on one another.