Urinary pt 2 Flashcards
The three continuous sections of renal tubule
Proximal convoluted tubule, nephron loop, distal convoluted tubule
What is proximal convoluted tubule?
Simple cuboidal epithelium and microvilli increases surface area and reabsorption capacity
What is nephron loop?
Originates at sharp bend in PCT and contains descending and ascending limbs
Thin segments tissue
Simple squamous epithelium
Thick segment tissue
Simple cuboidal epithelium
What is distal convoluted tubule?
Extends to collecting tubule and lined by simple cuboidal epithelium without microvilli
What are the two types of nephrons?
Cortical and juxtamedullary
How do you classify nephrons?
Relative position of renal corpuscle in the cortex and length of nephron loop
What are cortical nephrons?
Renal corpuscles near peripheral cortex, short nephron loop, and contains 85% of nephrons
What is juxtamedullary?
Renal corpuscles adjacent to corticomedullary junction, long nephron loops extend deep into medulla, helps establish salt concentration gradient big impact on ADH
How does nephrons drain?
Into a collecting tubule ->Collecting ducts -> Papillary duct
What are principal cells?
Responsive to hormones aldosterone and antidiuretic hormone(ADH)
What are intercalated cells?
Help regulate urine pH and blood pH
What is your juxtaglomerular apparatus?
Helps regulate blood filtrate formation and systemic blood pressure
What are granular cells?
Smooth muscles cells of afferent arteriole, contracted by stretch or sympathetic stimulation, synthesis, store, and release renin
