Ch. 24- Kidney Structure and Function Flashcards
What are the kidneys functions?
- Filter blood
- Remove Water-soluble wastes
- Help control BP and blood composition
- Help maintain RBC and calcium levels
- Help maintain acid-base balance
What is the GFR a standard to determine?
Kidney Failure
In relation to the GFR approximately how many mL/min can be filtered?
125mL/min
Where is the glomerulus located?
Between the afferent and efferent arterioles.
The Glomerulus is influenced by what?
Sympathetic Nervous System and Sensitive to angiotensin II (potent vasoconstrictor)
In relations to GFR how do the afferent and efferent arterioles respond to the sympathetic nervous system and angiotensin II?
By Vasoconstricting or Vasodilating.
A reduction of renal blood flow happens and a decrease in GFR when which arterioles do what?
Afferent arteriole vasoconstricts.
An increase in resistance to renal blood outflow increases glomerular pressure and GFR how?
Efferent arteriole vasoconstricts.
How would GFR change if there was an increase in BP?
efferent arterioles vasoconstrict
How would GFR change if there was a decrease in BP?
Afferent arteriole vasoconstricts.
Which Renal structure reabsorbs water?
Proximal Tubule
Which pathway turns on the Na+/K+ ATPase in the distal tubule?
Renin-Angiotension-Aldosterone Pathway
The Renin-Angiotension-Aldosterone Pathway cause Na+ and water to be what? causing what?
Reabsorbed.
- Raising blood volume
- No change to blood osmolarity.
What is secreted with the Renin-Angiotensin-Aldosterone pathway? causing what?
K+ , lowers blood K+
ANP (Atrial natriuretic peptide) is made by what?
Overstretched atria.
