Bio 253 final exam Questions and
Answers Graded A+
Organelles are - Correct answer-
Organs of the Urinary system - Correct answer-kidneys, ureters, urinary bladder,
urethra
draw and label a kidney with the following terms: Cortex, Medulla, Pelvis, renal
artery, renal vein, ureter, nephron - Correct answer-
functional unit of the kidney - Correct answer-nephron
1 million per kidney!
What parts make up the nephron? - Correct answer-Renal corpuscle
Renal tubule
Glomerulus (capillaries that filter the blood plasma)
Bowman's capsule (surrounds the glomerulus)
Efferent arteriole
loop of henle
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,What is the glomerulus made of? - Correct answer-capillaries
Function of a nephron - Correct answer-filter blood and produce urine
Two nephron types - Correct answer-juxtamedullary and cortical
juxtamedullary nephrons - Correct answer--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 - Correct answer--85% of all nephrons
-short nephron loops
-efferent arterioles branch into peritubular capillaries around PCT and DCT
How is urine made in the kidney? - Correct answer-1.)Reabsorption - moving
substances with tubule into the blood.
2.)filtration - occurs in the glomerulus or renal corpuscle
3.)secretion
4.)filtration
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, driving force for filtration - Correct answer-hydrostatic pressure or BP
What fluid comes out of the glomerulus? - Correct answer-filtrate
What is filtrate? - Correct answer-mostly water, electrolytes, nutrients, and waste
products. Glucose is normal in filtrate.
-similar to blood plasma
Reabsorption in the Nephron Loop - Correct answer-Only water is absorbed in the
descending limb. Na+ chloride is absorbed in the ascending limb (no water).
Status of water coming out of nephron loop? - Correct answer-@ Lowest
concentration (diluted)
Process taking place in nephron loop? - Correct answer-Countercurrent mechanism
(dilutes the urine). Can also create concentrated urine from the Na+ absorbed in the
ascending limb.
tubular secretion - Correct answer--selectively moves substances from blood to
filtrate in renal tubules and collecting ducts
-From blood to tubular
-Usually in the distal tubule
-K+, H+, Uric acid, Penicillin are secreted
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
Answers Graded A+
Organelles are - Correct answer-
Organs of the Urinary system - Correct answer-kidneys, ureters, urinary bladder,
urethra
draw and label a kidney with the following terms: Cortex, Medulla, Pelvis, renal
artery, renal vein, ureter, nephron - Correct answer-
functional unit of the kidney - Correct answer-nephron
1 million per kidney!
What parts make up the nephron? - Correct answer-Renal corpuscle
Renal tubule
Glomerulus (capillaries that filter the blood plasma)
Bowman's capsule (surrounds the glomerulus)
Efferent arteriole
loop of henle
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,What is the glomerulus made of? - Correct answer-capillaries
Function of a nephron - Correct answer-filter blood and produce urine
Two nephron types - Correct answer-juxtamedullary and cortical
juxtamedullary nephrons - Correct answer--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 - Correct answer--85% of all nephrons
-short nephron loops
-efferent arterioles branch into peritubular capillaries around PCT and DCT
How is urine made in the kidney? - Correct answer-1.)Reabsorption - moving
substances with tubule into the blood.
2.)filtration - occurs in the glomerulus or renal corpuscle
3.)secretion
4.)filtration
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
, driving force for filtration - Correct answer-hydrostatic pressure or BP
What fluid comes out of the glomerulus? - Correct answer-filtrate
What is filtrate? - Correct answer-mostly water, electrolytes, nutrients, and waste
products. Glucose is normal in filtrate.
-similar to blood plasma
Reabsorption in the Nephron Loop - Correct answer-Only water is absorbed in the
descending limb. Na+ chloride is absorbed in the ascending limb (no water).
Status of water coming out of nephron loop? - Correct answer-@ Lowest
concentration (diluted)
Process taking place in nephron loop? - Correct answer-Countercurrent mechanism
(dilutes the urine). Can also create concentrated urine from the Na+ absorbed in the
ascending limb.
tubular secretion - Correct answer--selectively moves substances from blood to
filtrate in renal tubules and collecting ducts
-From blood to tubular
-Usually in the distal tubule
-K+, H+, Uric acid, Penicillin are secreted
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
