Flashcards in Homeostasis Of Fluid And Electrolytes Deck (84)
Homeostasis of cells depends on
Homeostasis of body fluids
How much body fluid is in an average male adult human
What 4 mechanisms need to be regulated with body fluids
Concentration of solutes
What are the two main fluid compartments
Intracellular (in the cell)
Extracellular (outside the cell)
What types of extracellular fluid is there?
Intravascular (in the blood)
Interstitial fluid (inbetween cells), and transcellular fluid (just know it's there)
Is a type of extracellular fluid
ICF has more of what
Potassium and protien
ECF has more of what?
Sodium, chloride,and bicarbonate
Where does the movement of water btw fluid compartments happen (2 places for exchange)
Through the cell membrane or capillary wall
Explain sterlings law of the capillary.
Fluid moving in an out of the capillary through the use of hydrostatic and osmotic pressure
What drains the excess water that does not get re-absorbed by osmosis pressure.
The lymphatic system
No ATP requires, moves along a concentration gradient; driven by diffusion pressure
Moving molecules from an area with a high concentration to an area of low concentration
(must meet three criteria)
Moving through selectively permeable membrane
Along concentration gradient (from an area of high water concentration to an area of low water concentration)
Is facilitated diffusion active or passive
When molecules diffuse down their concentration gradient with the help of carrier or facilitator proteins
Uses carrier molecules to move solutes through membranes agains concentration gradients with the help of ATP
How do ions move between the interstitial space and intracellular space?
active transport (charged molecules)
How do nutrients, gases and waste move btw interstitial fluid and intracellular fluid.
What is your regulation of fluid output and input controlled by?
Antidiaretic hormone (ADH)
Renin-angiotensin-aldosterone system (RAAS)
Where does metabolic fluid come from?
the production of ATP
What is the main way to regulate fluids?
Where is the thirst centre found?
The Thirst center is stimulated by what 3 things?
Drop in saliva
Increase in blood osmolarity (solutes in blood)
Drop in blood volume
What starts the RAAS system?
Drop in blood pressure stimulate the kidneys to produce renin.
What are the two functions of angiotensin II?
1. Stimulate the adrenal cortex to produce aldosterone
2. Stimulate the hypothalamus to produce antidiuretic hormone
What does aldosterone do?
Causes renal reabsorption
(absorption of sodium and chloride which water follows)
What causes the RAAS system to stop?
The heart stretches and this stimulates it to release Atrial-Natuiretic Peptide (ANP)
When you consume too much salt what does this do to your blood pressure
Blood pressure increase
(this stimulates the production of ANP which decrease the production of renin, etc)