255 fluid electrolyte 3
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ADH is released by the .....
posterior pituitary gland
ADHs release is triggered by the....
osomlarity of the blood in the internal carotid
ADH alters what in the kidney? Which causes what?
- ADH alters the renal collecting duct permeability to water
- causing water to be reabsorbed
there are a number of factors that influence thirst. What are they
- plasma osmolarity
- plasma volume
- pharyngeal mucous membranes
- psychological factors
what is the main regulator of ADH
what is an osmotic diuretic?
- something that attracts water
- like glucose
what is the main negatively charged intravascular fluid anion
albumin (a plasma protein)
ADH is made where
in the hypothalamus
ADH is stored ans secreted from
the posterior pituitary
ADH acts on the
renal collecting tubules to regulate reabsorption of water
Aldosterone is produced by the
Aldosterone acts on the
renal distal convoluted tubule
Aldosterone regulates water reabsorption by
increasing sodium uptake from tubular fluid of the kidney into the blood
explain the RAAS
- Decreased blood volume stimulates the kidney to release renin.
- Renin causes angiotensinogen (plasma protein) to split and produce Angiotensin I
- The lungs convert angiotensin I to angiotensin II
- Angiotensin II stimulates the adrenal gland to release aldosterone
Glucocorticoids promote reabsorption of
- H2O and Na+
- which causes and increase in total blood volume
naturally occurring fatty acids which function in a variety f processes including maintenance of renal blood flow
Factors which reduce renal blood flow and thereby cause prostaglandin release include
- vasconstriction of the renal vessels
- decrease in total blood volume
- decrease in blood flow to the kidney because of heart failure
prostaglandin release causes what
vasodilation of the renal capillaries which increases blood flow to the kidneys
if blood pressure or blood volume increases the baroreceptors in the heart do what...
- the parasympathetic centers to reduce the HR and cause vasodilation, which lowers blood pressure
if blood pressure or blood volume decreases, the input to the medulla activates the
sympathetic nervous system which increases the HR and causes vasoconstriction, raising BP
a decrease in serum protein (decreased colloid osmotic pressure) can be caused by what
- liver disease
name three things that cause vasodilation and increased capillary permeability
- allergic reactions
normal serum potassium =
3.5 - 5.0 mEq/L
normal serum sodium
135 - 145 mEq/?
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