The micturition reflex is a feeling of the urge to urinate, and it is triggered

Question

The micturition reflex is a feeling of the urge to urinate, and it is triggered at a pressure of approximately 25 mm Hg on the bladder. a) Create a model and determine the weight alone, of a full term fetus, resting on the bladder of a pregnant woman can trigger this reflex? Give reasons for all your assumptions. b) How far below the surface of water would a fish experience such a gauge pressure? A giraffe has a large heart that pumps blood on the average of about 16 L/min, and it has a 2-meter long distance from the heart to the brain. Consider one long blood vessel of diameter 4.0 cm from the heart to the brain. a) Create a bar graph that displays the terms in Bernoulli's principle as it is applied to the blood flow from the heart to the brain. b) Determine the minimum blood pressure at the heart to pump the blood to the brain; include viscosity in your calculations. Two sets of charged tapes are created. The negative tapes are removed from the room and the positive tapes are held up one in each hand. Assume that one tape has twice as much charge as the other. Let point A be a point midway between the two tapes and point B be halfway between the midpoint and the tape with the higher charge. a) Which of the two point should a charge +Q be placed to experience the larger electric force? Explain. b) Which of the two points is higher in electric potential? Explain. Blood is flowing in a horizontal blood vessel of radius 2.0 cm. The flow rate is 5.0 L/min. It encounters a blockage so that one-fifth of the cross-sectional area is available for the flow to continue. If it takes three times as much pressure for the blood vessel to rupture, is there any danger that the blood vessel will rupture? Assume that normal blood pressure before the blockage is 100 mm Hg. You are stranded on a deserted island but you have the raw materials to try to light a small bulb. The bulb requires 0.5 V and has a resistance of 10 ohms. You have salt (sodium chloride) and a material that only allows chloride ions to flow through. a) How can you create a device to provide the 0.5 V to light the bulb? State in detail the concentrations of salt water to use and which side of your device is larger in electric potential. b) How much current flows through the bulb when you connect your device?

Explanation / Answer

a.) when we put some weight over bladder it will automatically increase the pressure on bladder and hence it can trigger the relax.

b.) guage pressure = rho*h*g

rho is density of water = 1

h is height of water

g is acceleration due to gravity

3333.05921 pascal = 1*h*9.81

h = 339.76 m

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