Body fluids Flashcards
What percentage of the animals total body weight is water?
60-70%
What percentage is intracellular fluid (ICF)?
40-50%
What percentage is extracellular fluid?
20%
What percentage of the extracellular fluid is interstitial fluid?
15%
What percentage of the extracellular fluid is intravascular fluid?
5%
what percentage of the extracellular fluid is transcellular fluid?
1%
What is Diffusion?
The movement of substances from an area of high concentration to one of a low concentration. The substances are passing down a diffusion gradient
What is Osmosis?
A process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one
What is Isotonic?
Fluid that has the same osmotic pressure as that of plasma (most fluid therapy involves the use of isotonic fluids)
What is Hypotonic?
The fluid has a lower osmotic pressure than that of plasma
What is hypertonic?
Fluid has a higher osmotic pressure than that of plasma
What is insensible or inevitable loss?
Fluid loss from the body such as respiration and sweating that cannot be regulated
What are cations?
Positively charged ions (electrolytes) such as sodium, potassium, calcium and magnesium
What are anions?
negatively charged ions such as chloride, bicarbonate, sulphate and phosphate
What is intracellular fluid?
fluid within the calls
What is extracellular fluid?
fluid surrounding the cells
What is plasma?
Fluid in the blood
What is transcellular fluid?
the fluids that are not inside the cells, but are separated from plasma and interstitial fluid by cellular barriers
Give examples of transcellular fluids
Cerebrospinal fluid, synovial fluid and pleural fluid
What is a solution?
a liquid in which one or more substances have been dissolved
What is a solvent?
a liquid which dissolves or has power to dissolve
Give examples of bodily fluids
Amniotic fluid Aqueous humour and vitreous humour Bile blood serum cerebrospinal fluid cerumen chyle
What is the calculation for fluid loss through respiration and sweating?
20ml/kg/day
What is the calculation for fluid loss through faeces?
10-20ml/kg/day
What is the calculation for fluid loss through urine?
20ml/kg/day
What is the estimated total fluid loss from the body?
50-60ml/kg/day
is the water content of neonates higher or lower than in adult animals?
Higher because the solid elements of the body are underdeveloped
By what other name might interstitial fluid be known?
tissue fluid
List some functions of the body water
transport medium
temperature regulation
lubrication
What is osmotic pressure?
The pressure by which water is drawn through a semi-permeable membrane; proportionate to the number of particles in the solution
How is water taken into the body?
drinking
food
metabolism
What is meant by sensible water loss?
losses controlled by physiologic functions; urination, lactation and gastrointestinal losses
What is an electrolyte ?
any substance that will split up into ions when dissolving in water. i.e any compound that can conduct and electric current when in solution
What is an ion?
an atom or group of atoms having an electrical charge by virtue of having gained or lost one or more electrons
What is the chemical sign for sodium
Na+
What is the main cation of the extracellular fluid?
Sodium
What is the main anion of the extracellular fluid?
Chloride
what is the chemical sign for chloride?
Cl-
What is the main cation in the intracellular fluid?
Potassium
What is the main anion in the intracellular fluid?
Bicarbonate
What is the chemical sign for potassium?
K+
What is the chemical sign for bicarbonate?
HC03-
What is plasma?
The fluid part of the blood which the corpuscles are suspended
What is serum?
the clear, fluid residue of blood from which corpuscles and fibrin have been removed
What is the daily water requirement for an adult dog?
40-60ml/kg/day plus other sensible losses
what is the daily water requirement for an adult cat?
60ml/kg/day
What is the daily water requirement for a kitten?
up to 150ml/kg/day
What is active transport?
The movement of electrolytes against an osmotic gradient.
what is the symbol for chlorine?
Cl -
What is the chemical sign for potassium?
K+
What is the chemical sign for calcium?
Ca+
what is the chemical sign for Phosphorus?
P-
What is the chemical sign for Magnesium?
Mg+