Urinary System Chap 20 Flashcards
Juxta
near to
Emia
Substance present in blood
Osis
Condition
Edem
Swelling
Calyx
Flower, funnel shaped
glom
grab hold of
Nephr
kidneys
polyuria
Excessive large amounts of Urine
Anuria
no passage of urine
mict
to pass urine
Detrus
To force away
Cyst
bladder
Court
covering
Location of Kidney
Against back muscle in upper abdominal cavity
Parts of Urinary System
Kidneys, Ureters, Bladder, Urethra
Internal Parts of Kidney
Capsule, Cortex, Nephrons, Medulla, Renal Pyramid, Renal Columns, Renal Papilla, Minor Calyx, Major Calyx, Renal Pelvis, Renal Pelvis
Renal Blood Pathway
Renal Artery, Afferent arterioles, Glomerular Capillaries, Efferent arterioles, Peritubular capillaries, venule, vein, heart
Tubular Fluid Patrhway
Bowman’s Capsule, Proximal Convoluted tubular, Nephron Loop Decending, Nephron loop Acending, Distal convoluted tubule, collecting duct, minor calyx, major calyx, ureter, bladder, urethra
3 processes that take place in nephron
Filtration, reabsorption, Secretion
2 types of Nephrons
Cortical- commom, more in cortex Juxtamedullary deeper in cortex dip into medulla, handle water regulation
Juxtaglomerular apparatus
plays role in secretion of renin when blood pressure drops
Renin-angiotensin system
Protein Angiotensinogen produced by liver, Kidney secrets Renin when blood pressure drops in the Juxtaglomerular Apparatrus, Renin combines with Angiotensinogen to form Angiotensin I, Lung secrets ACE to form Angiotensin II which causes Aldosterone secretion (Na+), and ADH (water retention).
Proximal Convoluted Tubular
where most of reabsorbtion takes place, water, Na+, amino acids, glucose
desending nephron loop
H2O reabsorbtion, passive
Ascending nephron loop
Na+, Cl-, K+ Active
Distal Convoluted Tubluar
Na+, Cl-
Tubular Secretions
secretions from peritubular capillaries into tubulars: penucillin, histamine, ammonia, potassium ions
Aldosterone and ADH
increases Na+ absorption into blood form DCT, ADH punches holes in collecting duct releasing H2O back into blood. Low ADH diluted urine, High ADH= concentrated urine
Glomerular Filtration Rate
Glomerular Hydostatic pressure most important, Glomerular Capsule Hydrostatic pressure and Glomerular Osmotic pressure oppose this. Arrerent Arteriole is a larger opening then then efferent artriole this increases pressure, favoring filtration
Glomerular Filtration Rate
180 L 24 hours
Urine formed in 24 hours
.6L- 2.5L
renal plasma threshold
when more glucose molecules are in filtrate then the active transport mechanism can handle
Urea
by product of break down of amino acids, 80% reabsorbed
uric acid
product of amino acid breakdown
urine
95% water
renal clearance test
how fast substance can pass through kidney flitration, inulin and creatinine
automatic bladder
when micturition reflex triggers internal urethral sphiceter and urniation occurs
micturtion reflex
stretch receptors in bladder stimulated and send signal to micturtion center is spinal cord, which acticates detrusor muscle to contract rhythmically, gives you feeling like you have to go
