The body system that includes kidneys, ureters, urinary bladder and urethra
Urinary System
Function of the urinary system
maintain electrolyte balance;
remove nitrogenous waste;
regulate fluid balance; maintain blood and tissue ph
The functional unit of the kidney
nephron
The cluster of capillaries, forming part of the nephron "little ball of yarn" that forms filtrate
glomerulus
"foot cells"
podocytes
capsule of the nephron
Bowman's Capsule
3 functions of the nephron
filtration;
reabsorption;
secretion
The smooth collapsible, muscular sac that stores urine temporarily (storage resevoir for urine)
urinary bladder
3 parts of the glomerular filtration membrane
fenestrated glomeralar endothelium (capillary);
basement membrane (connective tissue)
capsular epithelium (Bowman's capsule)
macula densa
chemoreceptors/osmoreceptors
JG (juxtaglomerular)cells
mechanoreceptors
ureter
exits pelvis of the kidney to urinary bladder
urethra
expels urine to the outside of the body
the openings in the glomerular endothelium [L. fedestratus, windows]
Fenestatal
functional unit of the kidney, consisting of the renal corpuscle, the proximal convoluted tubule, the loop of Henle, and the distal convoluted tubule
Nephron
one of two tubes conducting urine from the kidney to the urinary bladder
Ureter
tube conducting urine from the urinary bladder to the outside of the body
Urethra
Inability to prevent the discharge of any of the excretions, especially of urine or feces
Incontinence
part of the kidney consisting of renal lobules in the outer zone beneath the capsule and the lobules of the renal columns that are extensions inward between the pyramids;
Renal cortex- (contains the renal corpuscles, medullary rays, and proximal and distal convoluted tubules)
One of a number of pyramidal masses seen on longitudinal section of the kidney; they contain part of the loops of Henle and the collecting tubules
Renal Pyramid
Mass of capillary loops at the beginning of each nephron, nearly surrounded by Bowman’s capsule
Glomerulus
artery conveying blood to a part
Afferent vessel
efferent glomerular arteriole of kidney
Efferent vessel
a microscopic structure in the kidney, which regulates the function of each nephron. The juxtaglomerular apparatus is found between the vascular pole of the renal corpuscle and the returning Distal Convoluted Tubule of the same nephron. This location is critical to its function in regulating renal blood flow and glomerular filtration rate. The three cellular components of the apparatus are the macula densa of the distal convoluted tubule, smooth muscle cells of the afferent arteriole and juxtaglomerular cells.
JG apparatus
cells of the distal convoluted tubule located at the renal corpuscle and forming part of the juxtaglomerular apparatus
Macula densa
the nephron that extends from the glomerulus to the descending limb of the loop of Henle
PCT-(Proximal Convoluted Tubule
convoluted tubule of the nephron that extends from the ascending limb of the loop of Henle and ends in the collecting duct
DCT-(Distal Convoluted Tubule)
U-shaped part of tge nephron extending from the proximal to the distal convoluted tubule and consisting of descending and ascending limbs. Some of the loops of Henle extend into the renal pyramids
Loop of Henle
A double-walled, cup-shaped structure around the glomerulus of each nephron of the vertebrate kidney. It serves as a filter to remove organic wastes, excess inorganic salts, and water.
Bowman’s capsule
Movement, due to a pressure difference, of a liquid through a filter that prevents some or all of the substance in the liquid from passing through
Filtration
The act of resorbing
Resorption
Substance produced inside a cell and released from the cell
Secretion
Specialized capillary that extends from the cortex of the kidney into the medulla and then back to the cortex
Vas Recta
capillary network located in the cortex of the kidney; associated with the distal and proximal convoluted tubules
Peritubular capillary bed
The Bowman's capsule extends into a tubule that is proximal to the glamerulus, called the ______
PCT or proximal convoluted tubule
Hair pin loop of nephron tubule that descends/ascends, assisting electrolyte balance by forming a concentration gradient, is _______
Loop of Henley
portion of the loop of the nephron distal to the glomerulus is the _____
DCT or distal convoluted tubule
Urination, voiding, emptying of urinary bladder is formally called _______
micturition
small, red, retroperitoneal bean shaped organs that are responsible for urine formation, are called the
kidneys
substances that increase urine production are collectively called _____
diuretics
process of filtering, as in the glomerulus filtering filtering the blood into Bowman's capsule, is formally called _______
filtration
The outside of any organ is called the _______
cortex
pyramid shaped collection of tubules within the medulla of the kidneys
renal pyramids
opening "basin" or collective expansions of the major calyces in the kidney
renal pelvis
excretory product from the urinary system, or filtrate that has passed into the collecting ducts to the papillary ducts
urine
connective tissue "capsule" that wraps tightly around the perimeter of the kidney like the skin of an apple
renal capsule
measurement of concentration within a nephron, measured in milliosmols
concentration
indentation of the kidney
renal hilus or renal hilum
collective openings of two or more minor calyces
mahor calyces
middle of any organ is called the
medulla
middle of the kidney is called the
renal medulla
capsule that surrounds, supports and protects the kidney made of adipose tissue, is called the
renal capsule
fascia that surrounds the adipose capsule and holds the kidneys to the posterior body wasll is called the
renal fascia
the ducts that collect urine in the nephron are aptly called
collecting ducts
"foot cells" that surround the glomerular endothelium and form the external portion of the filtration membrane are called
podocytes
the substance that is filtered from glomerular blood plasma and seeps into the Bowman's capsule is now called
filtrate
the combination of the capillary hydrostatic pressure, the capsular hydrostatic pressure and the blood colloid osmotic pressure, together are referred to as the
NFP or net filtration pressure
the volume of filtrate formed each minute (125 mL/min)us called the
GFR or glomerular filtration pressure
The cells "next to the glomerulus" that secrete renin are called _______-
JG cells
The large ducts that drain (collect) filtrate from the distal convoluted tubules are called _____
collecting ducts
Transepithelial reclamation of solutes is called
tubular reabsorption
Reabsorption within the kidney tubules is called
reabsorption
Passive, nonselective process in which hydrostatic pressure forces fluids and solutes through the filtration membrane is called
passive
filtrationDiffusion of water across a semi-permeable membrane from a less concentrated solution towards a more concentrated one is called
osmosis
(where sodium goes, water will follow)
inflammation of the entire kidney is called
enteritis
_______ & ________ are antidiuretic hormones (decrease water flow)
ACH & ADH
_____ ___ excretes water that is pulled back into the sodium particles in the body
collecting ducts
tests for osmotic pressures/chemicals of substances
MD
ascending limb actively pumpts out ____ & ___ ions
Sodium and Chloride
If there is not enough blood pressure coming in the JG cells release __________(enzyme.hormone
redin
angitension stimulates the release of ___
aldosterone
Function of aldosterone is to ______
increase reabsorption of sodium in the collecting ducts
Aldosterone makes watery dilute back into concentrate, which increases the blood pressure in glomarulus and then system sends message to stop releasing _________
redin
Vasorecta are really slow pressure to ____
equal the pressure of concentrations
Aldosterone and ADH determine the _________ of urine.
concentration
Purpose of CCK (coloncystokinn)
concentration of the call bladder-emulsification of lipids;
__________ digestion secretions of pancreas
relax HP sphincter
The glomerular capillary pressure has to be higher 'cuz pressure in capsule needs to be higher to push fluid out of filtration or the ___and _ will both flow backwards and cause toxicity
capsular hydrostatic pressure (10mm Hg) &
blood colloid osmotic pressure (30 mm Hg)
Filtration is passive in the
glomerulus
Tell about Inulin
carbohydrate (Polysaccharide);
it is never reabsorbed or secreted, but filters out and goes outside the body