Biology 253 Final Exam Questions With
Correct Answers
Organelles are
Organs of the Urinary system
kidneys, ureters, urinary bladder, urethra draw and label a kidney with the following terms: Cortex,
Medulla, Pelvis, renal artery, renal vein, ureter, nephron
functional unit of the kidney
nephron
1 million per kidney!
What parts make up the nephron?
Renal corpuscle
Renal tubule
Glomerulus (capillaries that filter the blood plasma)
Bowman's capsule (surrounds the glomerulus)
Efferent arteriole
loop of henle
,What is the glomerulus made of?
capillaries
Function of a nephron
filter blood and produce urine
Two nephron types
juxtamedullary and cortical
juxtamedullary nephrons
-Long nephron loops deeply invade medulla
-Ascending limbs have thick and thin segments
-Important in production of concentrated urine
-found at the boundary of the cortex and medulla
cortical nephrons
-85% of all nephrons
-short nephron loops
-efferent arterioles branch into peritubular capillaries around PCT and DCT
, How is urine made in the kidney?
1.)Reabsorption - moving substances with tubule into the blood.
2.)filtration - occurs in the glomerulus or renal corpuscle
3.)secretion
4.)filtration
driving force for filtration
hydrostatic pressure or BP
What fluid comes out of the glomerulus?
filtrate
What is filtrate?
mostly water, electrolytes, nutrients, and waste products. Glucose is normal in filtrate.
-similar to blood plasma
Reabsorption in the Nephron Loop
Only water is absorbed in the descending limb. Na+ chloride is absorbed in the ascending limb (no
water).
Correct Answers
Organelles are
Organs of the Urinary system
kidneys, ureters, urinary bladder, urethra draw and label a kidney with the following terms: Cortex,
Medulla, Pelvis, renal artery, renal vein, ureter, nephron
functional unit of the kidney
nephron
1 million per kidney!
What parts make up the nephron?
Renal corpuscle
Renal tubule
Glomerulus (capillaries that filter the blood plasma)
Bowman's capsule (surrounds the glomerulus)
Efferent arteriole
loop of henle
,What is the glomerulus made of?
capillaries
Function of a nephron
filter blood and produce urine
Two nephron types
juxtamedullary and cortical
juxtamedullary nephrons
-Long nephron loops deeply invade medulla
-Ascending limbs have thick and thin segments
-Important in production of concentrated urine
-found at the boundary of the cortex and medulla
cortical nephrons
-85% of all nephrons
-short nephron loops
-efferent arterioles branch into peritubular capillaries around PCT and DCT
, How is urine made in the kidney?
1.)Reabsorption - moving substances with tubule into the blood.
2.)filtration - occurs in the glomerulus or renal corpuscle
3.)secretion
4.)filtration
driving force for filtration
hydrostatic pressure or BP
What fluid comes out of the glomerulus?
filtrate
What is filtrate?
mostly water, electrolytes, nutrients, and waste products. Glucose is normal in filtrate.
-similar to blood plasma
Reabsorption in the Nephron Loop
Only water is absorbed in the descending limb. Na+ chloride is absorbed in the ascending limb (no
water).
