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How would changing the amount of glucose available to a cell affect the rate of respiration?
Glucose utilization would increase a little
How does the addition of heat to a liquid affect its average kinetic energy?
It would increase its average kinetic energy which would be apparent by an increase in temperature.
How would having cuticle scraped off the surface of plants leaves affect?
It would increase transpiration and wilting .
How does global warming affect deciduous forests?
It would affect the deciduous forests because as the natural disaster comes the forest would get destroyed and there would be no habitat for the animals.
What would INCREASE the rate of dissolution but not affect the solubility of salt in water stirring or heating it?
Stirring and heating improve the rate of dissolution and not affect the measured solubility at a given temperature.But I mention that the solubilty of solids is increased when the temperature increase.
What does contraction of veins do to the venous system?
Contraction of veins would increase venous return to the right atrium. It would increase the efficiency of the heart pumping.
How does the venous return mechanism work?
pressure gradient , gravity , skeletal muscle pump, thoracic pump and cardiac suction would be the mechanisms for venous return.
In which situation would the stroke volume be the greatest?
SV = EDV - ESV Therefore, stroke volume is greatest when venous return is increased. By 1st year paramedic science student.
What increases venous return?
According to Starling's law, an increase in venous return (i.e. increase in preload on the ventricles) results in a more effective contraction, hence augmenting cardiac output, as long as the actin and myosin fibrils in the muscle fibers are not overstretched. In the most simple terms, the more blood the heart collects blood from venous return, the more it is able to distribute through cardiac output. If venous return is poor, cardiac output will be poor- basically like a water pump that is connected to an insufficient supply of water.
Does medial cubital vein contain valves?
I would think it would have to otherwise you wouldn't be able to get venous return to the subclavian.
What does the venous return depend on?
The veins act as a blood reservoir, because of the ease of distending them. 55-60% of blood is in systemic veins which is important for blood pressure. The volume of blood returned to the right atrium of the heart per minute is called the venous return. Generally venous return is equal to cardiac output, due to the closed system of the circulation, except for minor transient periods. A number of factors affecting the venous return are: Smooth muscle: Due to presence of smooth muscle, the diameter of the veins can be altered by sympathetic discharge(normally vasoconstrictive), adrenaline and angiotensin II (cause venoconstriction). But because the diameters of veins are large, venoconstriction has little effect on peripheral resistance. Elasticity of the heart: If the elasticity decreases, then the ability to fill the heart is reduced. valves: one way valves in the veins (not in large veins) ease blood flow to heart. Muscle pump: When muscles, particularly leg muscles contract, the thin walled veins are squeezed and the blood is forced towards heart, when muscles relax, blood enters the veins, but only from the arterial side. This is an important mechanism for facilitating venous return. Respiratory pump: Breathing in causes negative pressure in thorax causing a suction effect, i.e. the pressure gradient pushing blood towards the right atrium is increased, thus more blood returns to the heart, which means that inspiration leads to an increase in venous return. The opposite occurs with expiration, and venous return is decreased. Gravity: Opposes return of blood from the periphery during sitting or standing. The effect is lost when we lie down. Blood pressure at venous end of capillary: An increased pressure at the venule end of the capillary reduces venous return, because the pressure difference between the right atrium and the peripheral veins is reduced. Similarly a decrease in pressure at the venule end would increase venous return. Right atrial pressure: Is the inflow pressure for the heart. It is a function of the amount of blood returned to the heart and the pumping ability of the heart. Its value at rest is normally close to zero but can also become negative (between -4 to 5 mmHg). Its value is increased by blood volume, a weak heart, rapid increase in venous return. Its value is decreased by lower blood volume and a strong heart. The lower the pressure the greater the venous return (due to suction effect), but there is a limit to the increase in venous return because veins are collapsible.
What improves venous return to the heart during strenuous exercise?
Venous return (VR) is the flow of blood back to the heart. Under steady-state conditions, venous return must equal cardiac output (CO) when averaged over time because the cardiovascular system is essentially a closed loop. Otherwise, blood would accumulate in either the systemic or pulmonary circulations.
How does venous return impact the quality of performance?
venous return is the blood returning to the heart. Which means that the more blood is pumped out, the more returns. Starling's Law states that stroke volume is dependent upon venous return, therefore, if VR increases, SV increases, or, if VR decreases, SV decreases as well. So, the healthier the heart is, it pumps more blood providing the oxygen needed in the body for muscles to work. The faster the blood provides the oxygen, your body would have more oxgyen, this means that there would be less oxygen debt at the end of the event or game.
Increase in expected growth rate does what to required return rate?
An increase in a firm's expected growth rate would normally cause its required rate of return to
Why are vein important in blood circultion?
Veins are the vessels that carry de-oxygenated blood back the heart. Without the venous system, there would be no way for blood to return to the heart, and circulation would not be complete.
How would changing the amount of glucose available to a cell affect the rate of respiration?
Glucose utilization would increase a little
How would an increase in total expenditures affects the national's economy?
An increase in total expenditures affect the nation's economy would cause an expansion.
