Measurement of Pressure in the Body
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Questions and Answers

What is the classical method of measuring pressure using a U-shaped tube containing a fluid?

Manometer

What are the three types of pressure gauges used in a sphygmomanometer?

  1. Mercury type 2. Aneroid type 3. Electronic type

What is the most common clinical instrument used in measuring blood pressure?

Sphygmomanometer

What type of fluid is commonly used in a U-shaped manometer for measuring pressure?

<p>Mercury</p> Signup and view all the answers

What is the formula for calculating efficiency?

<p>Efficiency % = [output (work done) / input (energy consumed)] x 100%</p> Signup and view all the answers

How can the critical velocity of blood (Vc) be calculated?

<p>Vc = K x (η / ρ R)</p> Signup and view all the answers

What are the two types of flow in blood circulation?

<ol> <li>Laminar flow 2) Turbulent flow</li> </ol> Signup and view all the answers

What happens to the flow rate if the pressure difference is doubled?

<p>The flow rate also doubles.</p> Signup and view all the answers

How does the flow rate vary with the length and viscosity of the tube?

<p>The flow rate varies inversely with the length and viscosity of the tube.</p> Signup and view all the answers

What happens to the flow rate if the radius of the tube is doubled?

<p>The flow rate increases by a factor of 16.</p> Signup and view all the answers

In what units would the flow rate be measured if PA-PB is in N/m2, η is in pas, and R and L are in meters?

<p>The flow rate will be measured in m/sec.</p> Signup and view all the answers

What is the formula for calculating kinetic energy?

<p>K.E = 1/2 mv^2</p> Signup and view all the answers

How is the increased kinetic energy of the fluid obtained in the frictionless tube?

<p>The increased kinetic energy of the fluid is obtained by a reduction of the potential energy of the pressure in the tube.</p> Signup and view all the answers

What is the relationship between blood velocity and the total cross-sectional area of the vessels carrying the blood?

<p>The blood velocity is related inversely to the total cross-sectional area of the vessels carrying the blood.</p> Signup and view all the answers

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