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Bio 117 WVU Exam 3 Questions with Answers (100%
Correct Answers)
Osmoregulation Answer: The control of water balance and solute
composition
Nitrogenous waste Answer: Formed by the breakdown of proteins and
nuclei acids, toxic ammonia is produced
Directly excreted Answer: Toxic, needs lots of water, most invertebrates
and fresh water fish
Waste converted to urea Answer: Low toxicity, requires ATP, turtles
mammals marine fish amphibians
Waste converted to Uric acid Answer: Relatively nontoxic, largely
insoluble in water, birds
Four nephron parts Answer: Renal corpuscle, proximal tube, loop of
henle, distal tube
(All parts located in renal cortex except for the loop of henle)
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, 2
How do kidneys filter Answer: Fluids moved into bowmans capsule,
going down the defending limb we gain water and keep salt, going up
the ascending limb we keep water and lose salt through osmosis, active
transport happens in the thick part of the ascending limb
Antidiuretic hormone Answer: Causes a more concentrated urine to
form
Diabetes insipidus hormone Answer: Causes very dilute urine to form
Diffusion of oxygen Answer: Gas exchange over respiratory surfaces
happens entirely by diffusion. The diffusion requires surface area, thin
gas permeable surface, and water
Flicks law Answer: Rate of diffusion = k A (p2-p1)/D
K= diffusion constant
A= area
Ps= difference of pressure on either side of barrier
D= distance or thickness of barrier
© 2025 All rights reserved
Bio 117 WVU Exam 3 Questions with Answers (100%
Correct Answers)
Osmoregulation Answer: The control of water balance and solute
composition
Nitrogenous waste Answer: Formed by the breakdown of proteins and
nuclei acids, toxic ammonia is produced
Directly excreted Answer: Toxic, needs lots of water, most invertebrates
and fresh water fish
Waste converted to urea Answer: Low toxicity, requires ATP, turtles
mammals marine fish amphibians
Waste converted to Uric acid Answer: Relatively nontoxic, largely
insoluble in water, birds
Four nephron parts Answer: Renal corpuscle, proximal tube, loop of
henle, distal tube
(All parts located in renal cortex except for the loop of henle)
© 2025 All rights reserved
, 2
How do kidneys filter Answer: Fluids moved into bowmans capsule,
going down the defending limb we gain water and keep salt, going up
the ascending limb we keep water and lose salt through osmosis, active
transport happens in the thick part of the ascending limb
Antidiuretic hormone Answer: Causes a more concentrated urine to
form
Diabetes insipidus hormone Answer: Causes very dilute urine to form
Diffusion of oxygen Answer: Gas exchange over respiratory surfaces
happens entirely by diffusion. The diffusion requires surface area, thin
gas permeable surface, and water
Flicks law Answer: Rate of diffusion = k A (p2-p1)/D
K= diffusion constant
A= area
Ps= difference of pressure on either side of barrier
D= distance or thickness of barrier
© 2025 All rights reserved
