Term
|
Definition
functional part of the kidney
tubular structure |
|
|
Term
|
Definition
|
|
Term
|
Definition
| portion within the medulla |
|
|
Term
|
Definition
| outer layer containing most of nephron |
|
|
Term
|
Definition
| consists of triangular-shaped wedges (pyramids) which are separated from each other by areas of cortical tissue called renal columns |
|
|
Term
| What do the columns of Bertini contain? |
|
Definition
|
|
Term
| What do the collecting ducts do? |
|
Definition
| enter into calyces which lead into renal pelvis and then into ureter at the hilus |
|
|
Term
| What is found in the wall of afferent arteriole? |
|
Definition
| modified smooth muscle cells |
|
|
Term
| What is found in the wall of distal tubule? |
|
Definition
| narrowed macula densa cells |
|
|
Term
| What's the function of blood flow? |
|
Definition
| releases renin when renal blood flow is depressed |
|
|
Term
|
Definition
| ultimately triggers formation formation of angiotensin II which induces vasoconstriction and promotes release of aldosterone |
|
|
Term
| What does aldosterone do? |
|
Definition
| stimulates sodium reabsorption which causes increase water reabsorption and thus plasma volume is increased |
|
|
Term
| What does increased plasma volume to do blood pressure? |
|
Definition
| elevates BP which facilitates reduction of renal ischemia |
|
|
Term
| What are the 3 steps of urine formation? |
|
Definition
| filtration, reabsorption, secretion |
|
|
Term
|
Definition
| movement of plasma ultrafiltrate out of glomerulus into Bowman's capsule |
|
|
Term
|
Definition
| effective force driving fluid out of glomerulus |
|
|
Term
| glomerular blood pressure |
|
Definition
pushes fluid out of glomerulus into Bowman's capsule
normally measures 60 mm Hg |
|
|
Term
| glomerular colloid osmotic pressure |
|
Definition
serves to draw fluid out of Bowman's capsule back into glomerulus
normal ranges around 32 mm Hg |
|
|
Term
| bowman's capsule pressure |
|
Definition
resist movement of fluid out of glomerulus into Bowman's capsule
normally 18 mm Hg |
|
|
Term
| What does glomerular blood pressure depend on? |
|
Definition
| volume of blood entering the glomerulus |
|
|
Term
| Autoregulation mechanisms |
|
Definition
| reflex responses that guard against rapid changes in glomerular blood pressure |
|
|
Term
| What does dilation of afferent arteriole promote? |
|
Definition
| increase in glomerular blood volume |
|
|
Term
| What does vasoconstriction of afferent arteriole depress? |
|
Definition
| flow of blood through glomerulus |
|
|
Term
| Glomerular colloid osmotic pressure |
|
Definition
| varies primarily with plasma concentration of large protein molecules |
|
|
Term
| What influence surinary composition? |
|
Definition
| status of glomerular membranei |
|
|
Term
| What's reabsorption provide? |
|
Definition
| means for selectively retaining certain substances that initially filter into Bowman's capsule |
|
|
Term
| What does 65% of reabsorption take place? |
|
Definition
| PCT--proximal convulated tubule |
|
|
