Chapter 24 Flashcards
What are the functions of the renal system
regulate water, ECF ions, acid base balance, remove waste toxins and drugs, hormone production
What hormones does the renal system makes
Renin and Erythropoietin
What does renin do
maintain sodium potassium levels
What are the two layers of the kidney
the cortex and medulla
What is the glomerulus
where filtrate is formed
What is the function of podocytes
form filtration barrier
The three major parts of the renal tubule are
the proximal convoluted tubule, nephron loop, and distal convoluted tubule
What does the proximal convoluted tubule reabsorb
amino acids, glucose and sodium
What does the proximal convoluted tubule secrete
metabolic wastes and drugs
What does the descending segment reabsorb
water
What does the ascending segment reabsorb
sodium and chloride
Blood is at how many osmoles
300 miliosmoles
What does the distal convoluted tubule reabsorb
water and urea H ions and bicarbonate
What does the distal convoluted tubule secrete
Hydrogen ions, bicarbonate
The descending loop is ____ and permeable to _____
thin, water
Does the distal convoluted tubule have lots of microvilli
no
What is the function of the distal convoluted tubule
regulate ECF and electrolytes
What do principal cells do
sodium resorption
What do intercalated cells do
acid base homeostasis
What are the three pressures involved in Net Filtration Pressure
glomerular hydrostatic, glomerular osmotic, and capsular hydrostatic
What is the vasa recta
parallel to the loops of henle
What are JG cells
enlarged smooth muscle cells of arterioles
What do JG cells do
release renin
What are the macula densa
salt sensors that generate paracrine signals
