Bio 117 Final WVU Barry UPDATED
ACTUAL Exam Questions and CORRECT
Answers
in diffusion, water goes.... - CORRECT ANSWER - where the solutes go
plant hypotonic - CORRECT ANSWER - turgid (normal)
plant isotonic - CORRECT ANSWER - flaccid
plant hypertonic - CORRECT ANSWER - plasmolyzed
water potential - CORRECT 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 - CORRECT ANSWER - solute and pressure potential
solute potential (ΨS) - CORRECT ANSWER - tendency of water to move via osmosis in
response to solute concentration
-always negative
Why is solute potential always negative? - CORRECT ANSWER - because the cell always
contains solutes
pressure potential (ΨP) - CORRECT 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 - CORRECT ANSWER - -usually positive inside
living cell
- may be negative in dead cells such as xylem vessel elements
water potential gradient in vascular tissue - CORRECT ANSWER - root> leaf>
atmosphere
water potential in vascular tissue three hypothesis - CORRECT ANSWER - 1. root
pressure
2. capillary action
3. cohesion- tension theory
work together, not sepreately
root pressure - CORRECT 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) - CORRECT 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 - CORRECT 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
pholem - CORRECT ANSWER - moves foods and hormones wherever they need to go.
alive but mostly hollow
translocation - CORRECT ANSWER - movement of sugars through a plant
source - CORRECT ANSWER - a tissue where sugar enters the phloem
sink - CORRECT ANSWER - tissue where sugar exits the phloem
active transport in plant - CORRECT ANSWER - input and output of carbohydrates
into/out if phloem
passive transport in plants - CORRECT ANSWER - movement of carbohydrates while in
phloem
sugars getting in the plant - CORRECT ANSWER - - companion cells are actively
transporting the sugars from sources in phloem and out into sinks
pressure flow hypothesis - CORRECT ANSWER - the mechanism for movement of
sucrose from source to sink
five major categories of chemical signals - CORRECT ANSWER - 1. autocrine
2. paracrine
3. neural
ACTUAL Exam Questions and CORRECT
Answers
in diffusion, water goes.... - CORRECT ANSWER - where the solutes go
plant hypotonic - CORRECT ANSWER - turgid (normal)
plant isotonic - CORRECT ANSWER - flaccid
plant hypertonic - CORRECT ANSWER - plasmolyzed
water potential - CORRECT 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 - CORRECT ANSWER - solute and pressure potential
solute potential (ΨS) - CORRECT ANSWER - tendency of water to move via osmosis in
response to solute concentration
-always negative
Why is solute potential always negative? - CORRECT ANSWER - because the cell always
contains solutes
pressure potential (ΨP) - CORRECT 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 - CORRECT ANSWER - -usually positive inside
living cell
- may be negative in dead cells such as xylem vessel elements
water potential gradient in vascular tissue - CORRECT ANSWER - root> leaf>
atmosphere
water potential in vascular tissue three hypothesis - CORRECT ANSWER - 1. root
pressure
2. capillary action
3. cohesion- tension theory
work together, not sepreately
root pressure - CORRECT 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) - CORRECT 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 - CORRECT 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
pholem - CORRECT ANSWER - moves foods and hormones wherever they need to go.
alive but mostly hollow
translocation - CORRECT ANSWER - movement of sugars through a plant
source - CORRECT ANSWER - a tissue where sugar enters the phloem
sink - CORRECT ANSWER - tissue where sugar exits the phloem
active transport in plant - CORRECT ANSWER - input and output of carbohydrates
into/out if phloem
passive transport in plants - CORRECT ANSWER - movement of carbohydrates while in
phloem
sugars getting in the plant - CORRECT ANSWER - - companion cells are actively
transporting the sugars from sources in phloem and out into sinks
pressure flow hypothesis - CORRECT ANSWER - the mechanism for movement of
sucrose from source to sink
five major categories of chemical signals - CORRECT ANSWER - 1. autocrine
2. paracrine
3. neural
