Biology

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34 Questions - Developed by: - Developed on: - 2,072 taken

  • 1
    - The viscosity of liquids is characterised by an internal friction (among molecules) of the liquid
  • 2
    - The viscosity of the blood is determined by a permeability of blood vessel
  • 3
    - The viscosity of „complex“ liquids (colloids, blood, etc.) is affected by the speed of the liquid flow

  • 4
    - A decrease of viscosity of the flowing liquid may result in an occurrence of turbulence
  • 5
    - A narrowing of the blood vessel may results in an occurrence of turbulence within the blood stream
  • 6
    - A speed of the blood is inversely proportional to the cross-section area of the vessel in accordance with the Equation of Continuity

  • 7
    - A speed of blood in the vessel is proportional to the density of blood according to the Equation of Continuity
  • 8
    - The higher is a value of Reynolds number the higher is a probability for turbulent flow (e.g. of blood)
  • 9
    - A mean speed of the blood flow within the aorta is 0.03 m/s
  • 10
    - The blood flow is inversely proportional to the pressure gradient

  • 11
    - The higher is the viscosity the lower is the blood flow
  • 12
    - The elasticity of arteries is lower than the elasticity of veins
  • 13
    - An elasticity of arteries supports the blood flow also during the heart diastole
  • 14
    - The blood flows within any circulatory system requires the pressure gradient
  • 15
    - An elasticity of blood vessels increase the efficiency of the heart
  • 16
    - In blood capillaries there is no exchange of both the water and the nutrients

  • 17
    - In blood capillaries the diffusion of O2 and CO2 occurs commonly with the filtration of water and nutrients
  • 18
    - The waste products of metabolism are not reabsorbed in capillaries, as it occurs in veins
  • 19
    - The pressure gradient of (high pressure) large bloodstream is approximately 100 kPa
  • 20
    - The pressure gradient in the pulmonary circulation is approx. 30 kPa

  • 21
    - The “high pressure vessel system“ is represented by an aorta and arteries
  • 22
    - The “resistive vessels“ are arterioles, which are crucial in regulation of blood vessel resistance
  • 23
    - A speed of blood flow in the capillaries is approximately 1m/s (higher than within the arteries)
  • 24
    - A blood flow is proportional to pressure gradient, blood viscosity, and inversely proportional to the resistance of arterioles
  • 25
    - The blood viscosity is about 4.5-fold higher than the viscosity of distilled water
  • 26
    - A „collecting“ blood system is composed of the veins and lymphatic vessels

  • 27
    - The oedema (tissue swelling) is an accumulation of liquid within the cells of upper part of the body, as well
  • 28
    - An oncotic pressure participates on a filtration of water from the intravascular to the extravascular space
  • 29
    - High blood pressure (particularly within the venous system) increases the chance of oedema formation
  • 30
    - A decrease of the oncotic pressure (particularly due to lower content of plasmatic albumins within the plasma) reduces the chance for oedema

  • 31
    - An increase of capillary vessel permeability decreases the chance of occurrence of oedema
  • 32
    - A decrease of the lymph drain increases the chance for oedema formation
  • 33
    - The sound phenomenons, which occur during the blood flow are caused by a turbulent blood flow
  • 34
    -(2015) depolarization of SA (sinoatrial node) to atria and via conductive System also to Ventricles in healthy adult heart

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