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What change to a wire would cause its resistance to decrease?
Decreasing the length or increasing the thickness of the wire would cause its resistance to decrease.
Describe how a change in resistance would affect the current in a circuit?
As long as the voltage between the ends of the circuit remains constant, the current through the circuit is inversely proportional to the total effective resistance of the circuit.
Which would have the greater effect on vascular resistance?
Vasoconstriction would have a greater effect on increasing vascular resistance compared to vasodilation. When blood vessels constrict, their diameter decreases, leading to increased resistance to blood flow. Conversely, vasodilation results in an expansion of blood vessel diameter, reducing resistance.
What is ways to decrease air resistance?
To decrease air resistance, you can streamline the shape of the object moving through the air, reduce its surface area exposed to the air, and minimize any protruding or irregular features that would create drag. Additionally, you can increase the object's speed to help reduce the impact of air resistance.
When the diameter of a wire is doubled its resistance becomes .?
When the diameter of a wire is doubled, its cross-sectional area increases by a factor of four. Resistance is inversely proportional to cross-sectional area, so the resistance would decrease by a factor of four.
What causes peripheral resistance?
Peripheral resistance is the force against blood flow. In most cases, an increase in peripheral resistance would be caused by an increase in vasoconstriction, which would decrease blood flow. Other factors can influence vasoconstriction, such as circulating angiotensin II levels, cortisol levels, drugs such as cocaine and other adrenergic agonists, blood volume, atherosclerosis, emboli, renal diseases and increased intra-cranial pressure. An increase in blood pressure will also be caused by vasoconstriction and the mentioned factors.
What would lead to vasoconstriction of an arteriole?
Vasoconstriction of an arteriole can be caused by signals from the sympathetic nervous system, circulating hormones like epinephrine and norepinephrine, or local factors such as low oxygen levels or increased levels of certain molecules like endothelin. It results in the narrowing of the arteriole, which increases peripheral resistance and raises blood pressure.
Would vasoconstriction of the renal arteries decrease blood flow to the kidneys?
Yes. If you constrict the afferent arteriole then renal blood flow will decrease.
What change to a wire would cause its resistance to decrease?
Decreasing the length or increasing the thickness of the wire would cause its resistance to decrease.
Contraction of the smooth muscle in arterioles would decrease blood pressure?
Contraction of smooth muscle in arterioles would lead to vasoconstriction, which would increase resistance to blood flow and subsequently increase blood pressure. Conversely, relaxation of smooth muscle in arterioles (vasodilation) would decrease resistance and lower blood pressure.
What would decreased peripheral resistance to blood flow?
Vasodilation and decreasing blood viscosity
How would you explain what vasoconstriction mean?
Vasoconstriction is the narrowing of blood vessels.
Describe how a change in resistance would affect the current in a circuit?
As long as the voltage between the ends of the circuit remains constant, the current through the circuit is inversely proportional to the total effective resistance of the circuit.
Due to heat would the resistance in non-ohmic material decrease or increase?
Increase
Which would have the greater effect on vascular resistance?
Vasoconstriction would have a greater effect on increasing vascular resistance compared to vasodilation. When blood vessels constrict, their diameter decreases, leading to increased resistance to blood flow. Conversely, vasodilation results in an expansion of blood vessel diameter, reducing resistance.
How does vasoconstriction effect your body temperature?
Vasoconstriction (from "vaso-" meaning vessel) is constriction of the blood vessels. The opposite of vasoconstriction is vasodilatation, which is the relaxation of blood vessels. Vasoconstriction causes the radius of blood vessels to decrease, while vasodilatation increases radius.Blood flow through a vessel can be modeled as the flow of fluid through a pipe. Fluid flow through a pipe is directly proportional to the fourth power of pipe radius. As radius decreases, blood flow decreases, and vice versa. So vasoconstriction and vasodilatation can be used to regulate flow through a blood vessel.Peripheral blood vessels are usually considered those not in the core of the body and not those that supply skeletal muscles. A common example is the blood vessels of the skin. So peripheral vasoconstriction and vasodilatation control the amount of blood flow to the skin.Skin blood flow is a critical component of temperature regulation. To dissipate heat, warmblooded animals direct blood flow to the skin so it can be transferred to the surrounding environment. So if you were to exercise (which produces heat) or enter a steamy sauna, your skin blood vessels would vasodilate to direct that warm blood towards the skin surface so heat can be dissipated. Conversely, if you were to get cold for any reason, peripheral vasoconstriction would occur which would shunt blood away from the skin to help conserve heat and prevent its dissipation to the environment.
What will happen to the brightness of blub connected in series with a solenoid with a source of dc?
THE brightness would decrease as solenoid would have some resistance.
