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Bio 117 Final WVU Barry Questions with Answers
(100% Correct Answers)
in diffusion, water goes.... Answer: where the solutes go
plant hypotonic Answer: turgid (normal)
plant isotonic Answer: flaccid
plant hypertonic Answer: plasmolyzed
water potential Answer: -high-->low
- potential energy for water to move
- pure water at atmospheric pressure and room temperature has a
water potential of 0MPa
water potential is made up of Answer: solute and pressure potential
solute potential (ΨS) Answer: tendency of water to move via osmosis in
response to solute concentration
-always negative
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,2
Why is solute potential always negative? Answer: because the cell
always contains solutes
pressure potential (ΨP) Answer: tendency of water to move in response
to pressure
-keeps cell from bursting in hypotonic solution
-consists of water and turgor pressure
pressure potential from turgor pressure Answer: -usually positive inside
living cell
- may be negative in dead cells such as xylem vessel elements
water potential gradient in vascular tissue Answer: root> leaf>
atmosphere
water potential in vascular tissue three hypothesis Answer: 1. root
pressure
2. capillary action
3. cohesion- tension theory
work together, not sepreately
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, 3
root pressure Answer: active transport of minerals and ions into root
- root hairs and ion pumps aid in uptake of ions
- roots have lower water potential than surrounding soil
capillary action (three) Answer: 1. cohesion
- water molecules are "sticky" with one another
2. adhesion
- water molecules can "stick" to the inner surface of their container
3. surface tension
- water molecules of the surface are pulled down by interactions with
those molecules below
cohesion-tension theory Answer: - water pulled through a water
potential gradient that diffuses water vapor from leaves of the plant
-water moving up the xylem due to water sticking to each other and
the sides of the xylem
© 2025 All rights reserved
Bio 117 Final WVU Barry Questions with Answers
(100% Correct Answers)
in diffusion, water goes.... Answer: where the solutes go
plant hypotonic Answer: turgid (normal)
plant isotonic Answer: flaccid
plant hypertonic Answer: plasmolyzed
water potential Answer: -high-->low
- potential energy for water to move
- pure water at atmospheric pressure and room temperature has a
water potential of 0MPa
water potential is made up of Answer: solute and pressure potential
solute potential (ΨS) Answer: tendency of water to move via osmosis in
response to solute concentration
-always negative
© 2025 All rights reserved
,2
Why is solute potential always negative? Answer: because the cell
always contains solutes
pressure potential (ΨP) Answer: tendency of water to move in response
to pressure
-keeps cell from bursting in hypotonic solution
-consists of water and turgor pressure
pressure potential from turgor pressure Answer: -usually positive inside
living cell
- may be negative in dead cells such as xylem vessel elements
water potential gradient in vascular tissue Answer: root> leaf>
atmosphere
water potential in vascular tissue three hypothesis Answer: 1. root
pressure
2. capillary action
3. cohesion- tension theory
work together, not sepreately
© 2025 All rights reserved
, 3
root pressure Answer: active transport of minerals and ions into root
- root hairs and ion pumps aid in uptake of ions
- roots have lower water potential than surrounding soil
capillary action (three) Answer: 1. cohesion
- water molecules are "sticky" with one another
2. adhesion
- water molecules can "stick" to the inner surface of their container
3. surface tension
- water molecules of the surface are pulled down by interactions with
those molecules below
cohesion-tension theory Answer: - water pulled through a water
potential gradient that diffuses water vapor from leaves of the plant
-water moving up the xylem due to water sticking to each other and
the sides of the xylem
© 2025 All rights reserved
