Body Fluid Week 4

• Which of the following would best describe the approximate total percentage of body water in an obese subject?

  40%
• The barrier to fluid exchange between the intracellular and interstitial fluid compartments is which one of the following

  1. The capillary walls
  2. The cells membrane
  3. The nuclear membrane
  4. The blood brain barrier
  5. None of the above

  2
• The approximate volume of the interstitial fluid compartment is

  11 litres
• What proportion of total body water is accounted for by intracellular fluid?

  2/3rd
• The amount of water lost per day via the kidneys is

  0.5 - 1.5 litres per day
• Which one of the following statements concerning cerebrospinal fluid is FALSE?

  1. Protein concentration is lower than plasma
  2. It has an approximate volume of 150ml
  3. There are cells present in the fluid
  4. It has different ionic content to plasma
  5. It supplies the brain and spinal cord with nutrients

  3
• Which one of the following statements is FALSE?

  1. The protein content of the plasma is much higher than in interstitial fluid
  2. Very small particles are not free to move across the capillary walls
  3. Interstitial fluid and intracellular fluid have very different ionic compositions
  4. The volume of body fluid compartments can vary
  5. Body fluid volume is controlled by hormones

  2
• Hypernatraemia is a clinical condition where there is excessive sodium levels in the blood. Which of the following would you NOT expect to see in a patient with hypernatraemia?

  1. Thirst
  2. Hypervolaemia
  3. Low blood pressure
  4. Intracellular dehydration
  5. Plasma sodium concentration greater than 150mmol/litre

  3
• Belinda has been wearing a pair of black knee-high socks but since she got them from Primark the elastic at the top’s a bit dodgy and she’s had to resort to holding them up by tying string round them at the top. At the end of the day her ankles are swollen. This swelling has been caused by:

  1. Increased tissue hydrostatic pressure
  2. Increased capillary hydrostatic pressure
  3. Decreased plasma colloid osmotic pressure
  4. Obstructed lymphatic drainage
  5. Poor fashion sense

  2