Biofluids

Question 1

How many litres of fluid in the average (70kg) human body?

Answer 1

42 Litres

Question 2

How is the volume of water split Intracellularly and extracellularly?

Answer 2

Intracellular: 28 litres
Extracellular: 14 litres

Question 3

How is the volume of water split extracellularly (and into what compartments)?

Answer 3

Interstitial: 11 litres

Blood plasma: 3 litres

Question 4

What makes up blood serum?

Answer 4

3 litres of blood plasma
2 litres of blood cells (solutes)
Total of 5 litres

Question 5

Define and state the value of haemocrit?

Answer 5

Volume of RBC’s / Volume of Blood

40%

Question 6

Define and the state the value of Heart Rate?

Answer 6

Number of beats per minute (70bpm)

Question 7

Define and state the value of Stroke Volume?

Answer 7

Volume of blood pumped out (of the left ventricle) per heartbeat (70ml)

Question 8

Define and state the value of Cardiac Output?

Answer 8

Volume of blood pumped out by the heart every minute (circulating the body at any moment)
C.O = H.R x S.V
70bpm x 70ml = 4900 ml/m (5 litres)