BMS08-1011 Body Fluids

Question 1

Write 1 millimole per litre

Answer 1

1 mmol/l

Question 2

Name the 3 main fluid compartments and there % of water

Answer 2

Intracellular- 40
Plasma- 5
Interstitial- 15

Question 3

Name 4 other fluid compartments

Answer 3

Gi tract secretion
Lymph
Synovial fluid
Cerebrospinal fluid

Question 4

How can we measure fluid compartments?

Answer 4

Add known amount of substance to it and measure conc using V = substance / conc

e.g. things that wont cross capillaries or enter cells easily but does distribute in all water (heavy water, sucrose, albumin)

Question 5

What is the interstitial space?

Answer 5

Extracellular space - plasma volume

Question 6

What units measure osmolarity?

Answer 6

millosmoles/litre mOsm/L

Question 7

What is an osmole?

Answer 7

6x10 to the power of 23 per litre

Question 8

Tonicity

Answer 8

When solutions are separated by semi-permeable membrane

Question 9

What causes crystalloid osmotic pressure?

Answer 9

Small diffusible ions

Question 10

Describe a platelet (2)

Answer 10

No nucleus

Dense granules

Question 11

Which tissues don’t have the normal water composition? (3)

Answer 11

Bone
Fat
Plasma