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RUSVM Physiology II > Water Balance > Flashcards

Flashcards in Water Balance Deck (85)
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1

Osmolyte

Solutes that change the colligative properties of water

1

Plasmolysis

Shrinking of the cell

1

Insensible water loss

Losses in exhaled air, through the skin or in feces

1

Overhydration

greater than normal fluid volume

2

Causes of hypertonic dehydration

1. Respiration

2. Sweat (humans)

3. Inappropriate production of hypotonic urine

3

Osmolarity

Concentration of osmolyte

3

Two types of edema

Generalized

Localized

4

Concentration (C) = __________.

Concentration (C) = Mass / Volume.

4

Causes of isotonic dehydration

1. Hemorrhage

2. Sweat

4

___________: plasma in the animal is hypotonic, because the gain of water exceeds the gain of osmolyte.

Hypotonic Overhydration: plasma in the animal is hypotonic, because the gain of water exceeds the gain of osmolyte.

_____________________

Increased water, no change in osmolyte = cell swell

5

Important Anions of Plasma and Interstitium

Cl- and HCO3-

6

Hypotonic

Solution will cause the cell to swell

7

Net movement of water eventually results in _______________ pressures.

Net movement of water eventually results in equal but opposing pressures.

8

_________ pressure decreases dramatically from arteriole to venule

CHP pressure decreases dramatically from arteriole to venule

9

________ of body water is extracellular water.

20% of body water is extracellular water.

9

Important cations of the intracellular fluid

K+ and Mg2+

9

Dehydration

Less than normal fluid volume

10

Normal osmolarity

286-290 mOm

11

_____ of extracellular water is plasma water.

4% of extracellular water is plasma water.

11

Crenation

Term used synonymously with plasmolysis as it occurs in red blood cells

11

_________ are pressures from interstitium to plasma

Reabsorption are pressures from interstitium to plasma

11

Decreased PCOP caused by

Starvation

Kidney Disease

Liver Disease

_____________________

Decreased [protein] in plasma, thus decreased water moving into the capillary

11

Causes of hypotonic overhydration

1. Psycogenic

2. Excess Reabsorption of water

3. Drowning

13

Cardiac output = ____________.

Cardiac output = Stroke Volume x Heart Rate.

15

__________ of water is critical to normal functioning of the body.

Distribution of water is critical to normal functioning of the body.

16

Molal = ________.

Molal = Moles / Liter of H2O.

17

__________: mole of charge; equal + and -.

Equivalent: mole of charge; equal + and -.

18

_________: effective osmotic pressure; whether the movement of water will cause a cell to change in size

Tonicity: effective osmotic pressure; whether the movement of water will cause a cell to change in size

18

Starling Forces are

CHP

IFHP

PCOP

IFCOP

18

___________ are pressures from plasma to interstitium

Filtration are pressures from plasma to interstitium