Since amphibians are cold-blooded, they must find ways to keep their blood at a constant temperature to maintain homeostasis.

Since oxygenated and deoxygenated blood reflects light by different amounts, we can study which areas are more active ( i. e., those that have more oxygenated blood ).

Since the subarachnoid space around the brain and spinal cord can contain only 135 to 150 ml, large amounts are drained primarily into the blood through arachnoid granulations in the superior sagittal sinus.

Since the valves of the heart do not receive any dedicated blood supply, defensive immune mechanisms ( such as white blood cells ) cannot directly reach the valves via the bloodstream.

Since the action of the bolus insulin in the blood stream will extend for several hours, the basal insulin could be stopped or reduced during this time.

Since estrogen circulating in the blood can negatively feed-back to reduce circulating levels of FSH and LH, most oral contraceptives contain a synthetic estrogen, along with a synthetic progestin.

Since the blood vessels are involved in a patchy pattern, there may be unaffected areas on the vessel and the biopsy might have been taken from these parts.

Since 2003, blood banks in the US routinely screen for the virus among their donors.

Since there are no blood vessels, apart from the fine vessels running between the muscle layers of the body wall and a pair of arteries that supply the antennae, this is referred to as an open circulation.

Since oral decongestant drugs raise blood pressure levels, individuals with hypertension are advised to avoid them.

Since bicuspid valves are capable of regulating blood flow properly, this condition may go undetected without regular screening.

Since the blood of ray-finned fishes contains more salt than freshwater, they could simply get rid of ammonia through their gills.

Since the ventral and dorsal spinal cord have separate blood supply with very limited collateral flow, an anterior cord syndrome ( paralysis or paresis with some preserved sensory function ) is a possible surgical sequela, so it is important to have monitoring specific to the motor tracts as well as dorsal column monitoring.

Since beta blockers are known to relax the cardiac muscle and to constrict the smooth muscle, these beta adrenergic antagonists, including propranolol, have an additive effect with other drugs which decrease blood pressure, or which decrease cardiac contractility or conductivity.

Since blood is no longer being pumped through the body it drains to the dependent portions of the body, under gravity, creating an overall bluish-purple discolouration termed livor mortis or, more commonly, lividity.

Since patients with severe AS cannot increase their cardiac output, the blood pressure falls and the patient will syncopize due to decreased blood perfusion to the brain.

Since the stenosed aortic valve may limit the heart's output, people with aortic stenosis are at risk of syncope and dangerously low blood pressure should they use any of a number of medications for cardiovascular diseases that often co-exist with aortic stenosis.

Since the veins return blood to the heart, if a piece of a blood clot formed in a vein breaks off it can be transported to the right side of the heart, and from there into the lungs.

Since the 1890s it has been known that changes in blood flow and blood oxygenation in the brain ( collectively known as hemodynamics ) are closely linked to neural activity.

Since the nuclear pores are located in an area of high traffic, they play an important role in the physiology of cells.

Since then, fuel cells have been used in many other applications.

Since iodine is picked more readily ( though not exclusively ) by thyroid cells, and ( more important ) is picked up even more readily by over-active thyroid cells, the destruction is local, and there are no widespread side-effects with this therapy.

Since the archegonium is a haploid structure, egg cells are produced via mitosis.

Since estrogen enters all cells, its action are dependent on the presence of the ER in the cell.

Since the energy crises of the 1970s, interest in this quiet and potentially renewable marine energy source has been increasing steadily again, especially as solar cells became available, for the first time making possible motorboats with an infinite range like sailboats.

Since cnidae are " single use " cells, and this costs a lot of energy, in order to regulate discharge, cnidocytes are connected as " batteries ", containing several types of cnidocytes connected to supporting cells and neurons.

Since insulin is the primary hormonal signal for energy storage into fat cells, which tend to retain their sensitivity in the face of hepatic and skeletal muscle resistance, IR stimulates the formation of new fatty tissue and accelerates weight gain.

Since the cost of processing a silicon wafer is relatively fixed, using smaller cells and so packing more bits on one wafer reduces the cost per bit of memory.

Since all human cells depend on oxygen for survival, varying degrees of anemia can have a wide range of clinical consequences.

Since folate is needed by rapidly dividing cells to make thymine, this effect may be used to therapeutic advantage.

Since according to research, cells are common to all living things, they can provide information about all life.

Since then, the Police station on the ground floor has grown from a tiny office and a few cells to nearly encompassing the entire ground floor.

Since its stiffness is high there, it allows only high-frequency vibrations to move the basilar membrane, and thus the hair cells.

Since this discovery occurred in 1999, ES cells have become a key tool in the generation of specific chimeric mice.

Since epidemics are a problem, the wardens try to fill cells entirely with people with AIDS, or with tuberculosis ; however, this avails little, since almost every inmate is a user, and there is at most one needle per cell.

Since there are living cells within the cambium layers that need to exchange gases during metabolism, these lenticels, because they have numerous intercellular spaces, allow gaseous exchange with the outside atmosphere.

Since current dipoles must have similar orientations to generate magnetic fields that reinforce each other, it is often the layer of pyramidal cells, which are situated perpendicular to the cortical surface, that give rise to measurable magnetic fields.

Since the attacking cells employ the same advanced immune response as when inside the creature, they are able to resist conventional treatment methods.

Since an alkaline battery near fully discharged may see its voltage drop to as low as 0. 9 volts, Ni – Cd cells and alkaline cells are typically interchangeable for most applications.

Since 1994, a new version of the band has toured, with Parsons performing live acoustic guitar, keyboards and vocals, with various lineups.

The Oral Torah is the primary guide for Jews to abide by these terms, as expressed in tractate Gittin 60b, " the Holy One, Blessed be He, did not make His covenant with Israel except by virtue of the Oral Law " to help them learn how to live a holy life, and to bring holiness, peace and love into the world and into every part of life, so that life may be elevated to a high level of kedushah, originally through study and practice of the Torah, and since the destruction of the Second Temple, through prayer as expressed in tractate Sotah 49a " Since the destruction of the Temple, every day is more cursed than the preceding one ; and the existence of the world is assured only by the kedusha ... and the words spoken after the study of Torah.

Since the live operators are cutting from one live feed to another, the physical action of the shots matches very closely.

Since 1989, Brooks has released 19 records in all, which include ; 9 studio albums, 1 live album, 4 compilation albums, 3 Christmas albums and 2 box sets, along with 77 singles.

Since You Bet Your Life was mostly ad-libbed and unscripted — although writers did pre-interview the guests and feed Groucho ready-made lines in advance — the producers insisted that the network prerecord it ( instead of being broadcast live ).

Since any HMC student, regardless of class year, can live in any of the dormitories, several of the dorms have accumulated long-standing traditions and so-called ' personalities '.

Since removal, today they live primarily in Oklahoma.

Since 2006, the Met has broadcast live performances to several hundred movie screens all over the world.

Since 1989, when the custom of " pardoning " the turkey was formalized by George H. W. Bush, the turkey has been taken to a farm where it will live out the rest of its natural life.

Since armies could not live off the land indefinitely, Napoleon Bonaparte always sought a quick end to any conflict by pitched battle.

Since their 2008 reunion, The Feelies have regularly covered " Outdoor Miner " during its live sets and Lush ( band ) also covered the track.

Since most Serbs today live in towns and cities, the badnjak is symbolically represented by several leaved oak twigs that can be bought at marketplaces or received in churches.

Since the advent of radio, and then television, the speech has been broadcast live on most networks, preempting scheduled programming.

Since there was no blueprint or precedent for real-time news coverage, early efforts of the new division used the short-wave link-up CBS had been using for five years to bring live feeds of European events to its American air.

Since the band's inception, Andi Watson has been their lighting and stage director, designing the visuals of Radiohead's live concerts, such as the carbon-neutral " LED forest " of the In Rainbows tour.

Since these white-collar workers wanted to live closer to work, a neighbourhood with more white-collar jobs was more likely to be invaded ; the relationship between administrative activity and invasion was positively correlated ( London and Palen, 1984 ).

Since 1986 the stagnation in employment has led to a new inversion of the trend, caused not so much by an increase in the number of people leaving but by a fall in the number coming to live in the region, but in the 2000s ( decade ) net immigration has been positive again.

Since late 1969, Led Zeppelin had been planning on filming one of their live performances for a projected movie documentary of the band.

Since the band split, its members have sanctioned the release of a live album ( Rank, 1988 ), four greatest-hits collections ( Best ...

Since Dragaerans live for thousands of years, many characters appear in both series.

Since many of these fish live in regions where there is no natural illumination, they cannot rely solely on their eyesight for locating prey and mates and avoiding predators ; deep-sea fish have evolved appropriately to the extreme sub-photic region in which they live.

Since Taiwan's sovereignty belongs to China, the PRC's government and supporters mantain that the secession of Taiwan should be agreed upon by the 1. 3 billion Chinese citizens instead of just the 23 million ROC citizens who currently live in Taiwan.