1. What is the main method for exchange of nutrients at the systemic capillaries
ID: 3521520 • Letter: 1
Question
1. What is the main method for exchange of nutrients at the systemic capillaries and what is the main force that enables this method to occur?
a. transcytosis; vesicles
b. osmosis; pressure
c. simple diffusion; concentration gradient
d. bulk flow; pressure
2. Match the correct direction of fluid and solute movement with the force driving that movement.
a. all of the answers are correct
b. Into interstitial fluid: blood hydrostatic pressure
c. Into interstitial fluid: interstitial fluid osmotic pressure
d. Into capillary: blood colloid osmotic pressure
3. Which of the following descriptions is NOT correct in regards to the factors involved in bulk flow.
a. arterial end of capillary: BHP > BCOP
b. blood hydrostatic pressure: from blood pressure
c. blood colloid osmotic pressure: from water pressure in blood vessels
d. venous end of capillary: BCOP > BHP
4. Which clinical situation will increase vascular resistance and why?
a. arterial vascular disease: decreases lumen size
b. obesity: increases length of vessels
c. dehydration: increases blood viscosity
d. all of the answers are correct
Explanation / Answer
1. Simple diffusion:
It is process by which the solutes or nutrients are moved along the semiperiable membrane by the concetration gradient. Hence the tsimple diffusion is the main mehod of simple diffusion aginst force cretaed concentrated gradient.
Hence option (C) is correct.
2) Solute moves from high concentraion to low concentraion by osmosis and diffusin viceversa. They can move from into interstitial fluid and blodd hydrostatic pressure and interstial fluid osmotic pressure. Blood colloid osmotic pressure.
3) Blood colloid osmotic pressure : from the water pressure in blood vessles is not correct answer.
4) Arterial vascular diseases and decrease in lumen size results into increase in vascular pressure and hence the vascular resistance. Obsesity lead to increase in LDL increases and hence the cholesterol and resuls in the increase in vascular resistance. Dehydration leads to increase in the blood viscosity and hence the increase blood vascular resistance.
Hence all the options are correct.
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