Urinary System Flashcards
Define filtration membrane
Leaky barrier of glomerular endothelial cells
Define fenestrations
pores in the glomerular epithelial cells
Define detrusor muscle
Smooth muscle found in the wall of the urinary bladder that contracts during urination
Define internal urethral sphincter
urethral sphincter muscle composed of smooth muscle which constricts the internal urethral orifice
Define external urethral sphincter
urethral sph incter muscle composed of skeletal muscle which controls the flow of urine through the urethra under voluntary control
What is micturition?
the discharge of urine from the urinary bladder
List the major components of the urinary system
2 kidneys
2 ureters
1 urinary bladder
1 urethra
List functions of Kidneys
Excrete waste in urine Regulate blood volume Regulate blood composition Regulate blood pressure Synthesize glucose Release erythropoietin Participate in Vitamin D synthesis
List function of Ureters
transport urine from the kidneys to UB
List function of UB
store urine
List function of urethra
discharge urine from the body
The nephron is __________
the functional unit of the KD
List the components of the KD
renal cortex renal medulla nephron collecting duct minor calyx major calyx renal pelvis
List the components of a nephron
glomerulus, bowman’s capsule, renal tubule
What are the major blood vessels of the kidney?
Renal artery segmental artery interlobar artery arcuate artery glomerular capillaries interlobar veins renal vein
