Flashcards in fluid and electrolytes Deck (107)
How much of body mass is water?
How many mls are required per day for life?
How much water do we typically consume a day?
what is a healthy daily water consumption?
What does out water balance affect?
cardiovascular function (blood pressure)
What are some factors that affect water balance?
What makes up total body water (TBW)?
what is extracellular fluid composed of?
lymoh, synovial, intestinal, biliary, hepatic, pancreatic, CSF, sweat, urine, pleural, peritoneal, pericardial, and intraocular fluids
Where does ADH (vasopressin) come from?
where does ADH act?
collecting Duct of Nephron
what does ADH do?
causes insertion of aquaporins into collecting duct which leads to water reabsorption by kidneys.
What does ADH do?
regulates urine flow by increasing the permeability of the renal collecting duct to water.
more water is removed from the urine when ADH is present.
How do baroreceptors in the aortic arch and carotid sinus regulate ADH?
It sensing the decrease in blood pressure
How does the hypothalamic osmoreceptor regulate ADH?
it detects increased plasma osmolarity which then reduces blood volume.
right arterial stretch as well as a alcohol and caffeine _____ ADH release
as blood pressure ______, urine flow _____.
as blood pressure increase, urine flow increases.
where is aldosterone released from?
what does aldosterone regulate?
sodium and potassium balance.
how does aldosterone increase sodium?
Sodium reabsorption from the urine and sweat
uptake from the gut
how does aldosterone decrease potassium?
by increasing secretion into the urine
Atrial natriuretic peptide or factor
the signal to increase or decrease blood volume
When is ANP released from the right atrium?
when the atrium is stretched as a cause of high venous blood volume and congestive heart failure.
what are pressures that determine the movement of water between vessels and tissues (capillary shift)?
the physical pressure that the fluid is excerting on walls
a function os heart beat, water volume, gravity and vessel size
its kinda of a pulling pressure. Is there is a compartment with more "stuff" it will have a higher oncotic pressure. The more proteins the more it will pull water in.
it's a function of plasma proteins
Capillary hydrostatic pressure
out of the capillary
plasma oncotic pressure
into the capillary
interstitial hydrostatic pressure
out of the interstitial fluid (into the capillary)