Flashcards in Renal Histology II Deck (32):
What type of epithelium is found in the thick segments of the loop of Henle?
What type of epithelium is found in the thin segments of the loop of Henle?
simple squamous epithelium.
The apical surface of cells at the thick ascending limb lack what structures?
What is the ascending limb of the loop of Henle impermeable to?
The descending limb of the loop of Henle is permeable to what?
water, sodium and chloride ions.
The ascending thin limb is impermeable to wat?
What is the major function of the loop of Henle?
to establish the counter-current exchange system which creates osmotic conditions necessary to pull water out of the distal convoluted tubule and collecting duct in the presence of ADH.
As ADH is released, what does the distal convoluted tubule become permeable to?
What type of epithelium is found at the distal convoluted tubule?
How do the cells of the distal and proximal convoluted tubules differ?
The cells in the distal convoluted tubule are smaller.
What are two major specialized cells types associated with the collecting duct?
What do principal cells reabsorb and secrete?
They reabsorb sodium ions and water.
They secrete potassium.
What do intercalated cells secrete?
Hydrogen or bicarbonate ion.
What comprise the excretory passages of the kidney?
renal pelvis, ureter and urinary bladder.
What are the layers found in the excretory passages?
The mucosa of the excretory passages is composed of what type of epithelium?
The muscularis is composed of what type of tissues?
What kind of epithelium is found in the prostatic urethra?
What kind of epithelium is found in the membranous urethra?
True or false: the prostatic urethra is highly vascularized.
The membranous urethra eventually becomes what?
the external sphincter
The cavernous urethra is composed of what type of epithelium?
stratified squamous epithelium
What gland is found in the male urethra?
Glands of littre
What are the lucanae or Morgagni?
Invaginations o fmucous membrane containing single or groups of intraepithelial mucous cells.
What type of epithelium is found in the female urethra?
stratified or pseudostratified columnar
Angiotensinogen is converted into angiotensin I by what?
The loop of Henle is between what two tubules?
proximal and distal convoluted tubules.
What converts angiotensin I to angiotensin II?
ACE (angiotensin converting factor from pulmonary and renal endothelium)
What does angiotensin II stimulate?
The secretion of aldosterone from adrenal cortex.
What cells do aldosterone act upon?
principal cells of the collecting ducts
thick ascending limbs of Henle
What is the function of angiotensin II?
To increase the reabsorption of sodium ion and water, which increases blood pressure.