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FISIO GENERAL > Tema 2 > Flashcards

Tema 2 Flashcards

1
Q

water percentage
- different parameters

A

50-60% os body mass in adults
AGE: newborns have a higher % than aduts
SEX: women are 55% fluids, men 60%
ORGANS: brain> liver> muscle> skin> bones> fat

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2
Q

CORPORAL LIQUID COMPARTMENTS

A

Not homogeneous
2/3 in the intracellular liquid
1/3 in the extracellular liquid
- 80% intersticial liquid
-20% plasma
-transcelullar liquids

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3
Q

SEMIPERMEABLE MEMBRANES

A

Plasmatic: separates ICL and ECL
Endothelium: separates plasma and intersticial liquid

FLUIDS ARE IN CONSTANT MOVEMENT, VOLUME IS CONSTANT

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4
Q

differences of the extracellular liquid

A

plasma has more protein anions than the interstitial liquid
plasma has less Cl- than the interstitial liquid
plasma and intersticial have aprox the same concentration of Na+

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5
Q

units of concentration of ions

A

mEq/ L
mmol/ L

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6
Q

chemical differences between ECL + ICL
Na+

A

Na+: 142/ 10

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7
Q

chemical differences between ECL + ICL
K+

A

K+: 4/ 140

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8
Q

chemical differences between ECL + ICL
Ca2+

A

2,4/ 0,001

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9
Q

chemical differences between ECL + ICL
Mg2+

A

1,2/ 58

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10
Q

chemical differences between ECL + ICL
Cl-

A

103/4

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11
Q

chemical differences between ECL + ICL
HCO3+

A

28/10

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12
Q

chemical differences between ECL + ICL
(PO4)3-

A

4/75

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13
Q

chemical difference ECL + ICL
glucose and proteins

A

C6H12O6: 90/ 0-20
a. acids: 30/200

units: mg/dl

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14
Q

OSMOSIS definition

A

movement of water particles form a high water potential to a low water potential through a semipermeable membrane

It’s the main mechanism through which water moves
When there is a difference in concentration of a non-diffusible substance

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15
Q

the balance between two compartments requires (osmosis)

A

Adequate amount of water
Adequate amount of electrolites

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16
Q

osmotic equilibrium
osmotic pressure

A

ECL + ICL are in osmotic equilibrium
• Osmotic pressure in ECF depends 80 % of Na+ and Cl-.
• Osmotic pressure in ICF , depends 50 % of K+ and the rest divided by other substances

The volume flow through a membrane is determined by the equilibrium between the hydrostatic and osmotic pressures on both sides of the membrane.

17
Q

isotonic, hypertonic, hypotonic solutions

A

hypertonic: water moves from ICL to ECL as it has more solutes (ECL)
- cells decrease volume
hypotonic: water moves from ECL to ICL as it has less solutes/ more water
-cells increase volume

18
Q

Distribution of a fluid through the membranes of a capillary

A

Pc +πi = Pi +πp

P: hydrostatic pressure
π: coloidosmotic pressure

19
Q

fluid quantification
-plasmatic and ECF volume

A

plasmatic volume: blue Evans or radioactive elements
–> they bind to plasmatic proteins, but not red blood cells
ECF volume: substances that diffuse easily but don’t enter the cell, such as radioactive elements

FISIO GENERAL (15 decks)

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