chapter 18 hemodynamics chpt 1

indicates volume of blood moving during a particular time

• flow

• velocity

• pulsatile flow

• phasic flow

• steady flow

what happens during inspiration

• diaphragm moves down, the chest expands, thoracic pressure decreases, abdominal pressure increases, venous return to the heart increases, venous flow in legs decrease

• diaphragm moves up, thoracic pressure increases, abdominal pressure decreases, venous return to the heart decreases, venous flow in legs increases

• not enough information

the hydrostatic pressure of 0mmHg is located where

• the ankle

• top of the head

• mid chest

• the knee

• the waist

at locations below the heart level, the hydrostatic pressure is ____

• positive

• negative

• not enough information

inertial energy loss

• energy is lost when the speed of a fluid changes

• when flow energy is converted to heat as one object rubs against the other

• more energy is lost with movement of high viscosity fluids

• comparison of movement of fluid through a tube and movement of electricity through a wire

kinetic energy depends on what two factors ?

• • - an objects mass

  • - the speed at which it moves

• • - major form of energy circulating blood

  • - creates flow by overcoming resistance

• • describes relationship between

  • - velocity and

  • - pressure in moving field

• none of these

• - an objects mass

• - the speed at which it moves

  • these are two factors that ___ energy depends on

• kinetic energy

• pressure energy

• gravitational energy

• none of these

what even provides energy to the circulating blood

• imparted by blood by the contraction of the heart during systole

• an objects mass

  • - speed at which it moves

• parabolic flow

• plug flow

energy gradient

• blood moving from regions of higher energy to lower energy

• imparted by blood by the contraction of the heart during systole

• associated with a moving object

• an object mass and the speed at which it moves

• stored or potential energy

when pressure gradient increase & resistance decreases

• flow increases

• flow decreases

• flow remains the same

• not enough information