Urinary System Flashcards
What is the function of the Urinary System?
The kidneys,ureters, bladder, and urethra form a filitration system that regulates the ionic composition of the blood and body fluids and elminates wastes.
What is the urinary system made up of?
Kidneys
Ureters
Urinary bladder
Urethra
What the 3 regions of the cortex?
Renal cortex (superficial) Renal Medulla (deeper) Renal sinus
What is the function of the kidneys?
Regulates:
Electrolytes, pH
Blood pressure, blood volume and osmolarity
Hormones (renin, EPO)
Filters blood to remove waste
Draw and label the Kidney.
Frontal section of the right kidney
What are the 3 layers of the kidney?
Renal Fascia
Adipose Capsule
Renal Capsule
What is the renal fascia?
Attached to the abdominal wall–outer layer of dense irregular connective tissue
What is the adipose capsule?
Adipose tissue–used for protection and padding
What is the renal capsule?
thin fibrous membran–covers the outer surface of the kidney; innermost
When can you call urine , urine?
When it enters in the collecting ducts
What happens in the beginng before urine forms?
Goes in glomerulus which contains blod, then it filtrates into the tubules
What are ureters?
Carries urine from the internal orfice to the external urethral orifice where urine exits the body–has transitional epithelium
How does the urine proprel out?
By perstalsis, hydrostatic pressure,and gravity
What is the function of the urinary bladder?
Micturition
What smooth muscle does the uninary bladder have?
Detrusor muscle
What sphicters allow the flow of urine out?
Internal and external uninary sphincters
What the differences between male and female urethra?
Male urethra:
longer than female
Divide into 3 regions: prostatic urethra, membranous urethra, and spongy urethra
Female:
Urinary bladder located inferior to the uterus
What is a nephron?
It is a functional unit of the kidney
What does the nephron contain?
Nephron is composed of a renal corpuscle and renal tubules that modifiy and secrete urine.
Where does the filtration start?
Blood pass through the filtration membranes (glomerular capillary walls and visceral wall of the glomerular capsule) into the capsular (Bowman’s) space (glomerular cavity).
Where does secretion starts?
Solutes leave the peritubular capillaries or vasa recta, diffuse through the ISF and cross the wall of the renal tubule and are elminated into urine.
Where does resorption happen?
Cross the wall of the renal tubule, diffuse through the ISF and return to blood by entering the peritubular capillaries or vasa recta.
The blood flow through the juxtamedullary nephron has what type of characterisitics?
They are longer they dip down farther into the medulla
Their blood supplies (capillary beds) have a speical name: vasa recta
Runnin Sucks In Arizona I Always Go Early stands for what?
Renal Artery Segmental Arteries Interlobar Arteries Arcuate Arteries Interlobular Arteries Afferent Arterioles Glomerular capillaries Efferent Arterioles
