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Well there is the common Bloodworm (Glycera dibranchiata)which people use for fishing bait. The animals are unique in that they contain a lot of copper without being poisoned. Their jaws are unusually strong since they too contain the metal in the form of a copper-based chloride biomineral, known as atacamite. ...


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I think the question is not whether the blood flux is constant in time, but rather in space: if 5L/min is the flux through aorta (in given physiological conditions), then at the same moment 5L/min will cross the capillaries. This is volume conservation, for a closed system filled with an incompressible fluid, see this sketch: If 5L are pushed through the ...


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It is ofc. not true, because it is not a closed system. The kidneys filter blood and excrete water and other compounds (which are reabsorbed or go to urine), the sweat glands remove water and salts. By drinking daily 2 liters (the total blood volume is about 5 liters) of fresh water and salts are absorbed from the intestines to the circulation, by eating ...


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The action potential causes Ca2+ ions to be released in the cells, that is needed for muscle fiber contraction. There is a small time delay from the arrival of the action-potential until the Ca-ions are released and reach the required concentration in the cell for contraction. On the molecular level there is a protein called troponin (this is bacically ...


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Interesting question. Here what I think (I am not an expert in congenital analgesia so take it with a grain of salt). The pain provoked by an high temperature is mainly transmitted via the receptor TRPV1 (a Ca2+-channel nocireceptor) while cold sensation is driven by TRPM8 and possibly, for noxious cold, via TRPA1 (two similar types of Ca2+-channels). Those ...


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The wikipedia page for CPR actually goes into some detail on this, going to block quote the section here for ease of access, Compression-only (hands-only or cardiocerebral resuscitation) CPR is a technique that involves chest compressions without artificial respiration. It is recommended as the method of choice for the untrained rescuer or those who are ...


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I was able to do some reading and research and I found some interesting information that was a). news to me. And b). the answer is yes... And no. A spasm can be the cause of a heart attack by causing the coronary artery to contract. When that artery contracts, it causes a dramatic decrease in blood flow to the heart. When the heart looses access to ...


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Could it be beneficial to artificially induce fever in a person who has an illness if they are not already experiencing fever? No, not really. Pretty much the only use of hyperthermia in medicine is in the treatment of cancer. If you google "use of hyperthermia in medical treatment", you'll likely only find two kinds of hits: those for cancer treatment ...


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Actually, hyperthermia is a known treatment for a range of diseases, including cancer. Induced hyperthermia can be whole-body as well as local/regional and is under investigation in multiple studies (for example).


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Nope. All blood flows in the body can change at any time(more or less). If the heart rate and blood pressure, etc, is constant the amount of blood that travels through the aorta is constant, yes. But there is far more capacity in the arterial and venous systems for the actual amount of blood flow there normally is. Veins and arteries contract and expand to ...


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This review paper states that spruce is isohydric, citing Physiologie und Ökologie der Gehölze by Lyr, Fiedler, & Tranquillini: Spruce appears to reflect an isohydric strategy (Lyr et al. 1992), reducing stomatal conductance at early stages of soil drought. It's important to note that this is not a binary distinction, isohydric and anisohydric are ...


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Like with the rat monogamous pair bond study a similar experiment was done with monogamous Prarie voles where they found similar results. Women naturally Have more neurological receptors in their brains for oxytocin. The rise in oxytocin comes from blood level measurements so when people say oxytocin rises through orgasm they mean it rises in the blood ...



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