PNB Exam 2 UConn (2) questions well
answered already passed
muscle has ___________ potential meaning it is able to pass a current through - correct answer
✔✔ bioelectric/electric
plasma membrane is responsible for keeping charged particles _______ from each other -
correct answer ✔✔ separate
examples of integral membrane proteins - correct answer ✔✔ channels/ion transporters
Vm is potential inside the cell relative to the potential _______________ expressed as a voltage
- correct answer ✔✔ outside the cell
always describing intracellular to extracellular
voltage gated means...
ligand gated means... - correct answer ✔✔ electrically activated
chemically activated
increasing permeability allows that ion to move__________________. - correct answer ✔✔
down their concentration gradient
K+ concentration: ________ in _______out - correct answer ✔✔ 100 ; 5
Na+ concentration: _____in ______out - correct answer ✔✔ 10 ; 100
, Cl- concentration: _______in ______out - correct answer ✔✔ 10 ; 105
Ca2+ concentration: ______in ______out - correct answer ✔✔ 0.001 ; 1.2
if all channels were non -selective, _________ would always occur with no gradients meaning
no membrane potential and excitable tissues would not contract - correct answer ✔✔
equilibrium
only occurs if dead
_______ permeability occurs at ___________ cells. - correct answer ✔✔ selective; excitable
although some channels are selective only for (+) only and transport already occurred, because
opposite charges attract and there are more (-) inside the cell v (+), some (+) cells that moved
out by concentration gradient with actually re-enter the cell to balance out charge - correct
answer ✔✔
equilibrium potential for an ion (Ex) is the _________________ at which the ________________
and ___________forces are equal and opposite - correct answer ✔✔ membrane potential
concentration gradient
electrical
net flux=0
Equilibrium is different for each ion. (T/F) - correct answer ✔✔ true
answered already passed
muscle has ___________ potential meaning it is able to pass a current through - correct answer
✔✔ bioelectric/electric
plasma membrane is responsible for keeping charged particles _______ from each other -
correct answer ✔✔ separate
examples of integral membrane proteins - correct answer ✔✔ channels/ion transporters
Vm is potential inside the cell relative to the potential _______________ expressed as a voltage
- correct answer ✔✔ outside the cell
always describing intracellular to extracellular
voltage gated means...
ligand gated means... - correct answer ✔✔ electrically activated
chemically activated
increasing permeability allows that ion to move__________________. - correct answer ✔✔
down their concentration gradient
K+ concentration: ________ in _______out - correct answer ✔✔ 100 ; 5
Na+ concentration: _____in ______out - correct answer ✔✔ 10 ; 100
, Cl- concentration: _______in ______out - correct answer ✔✔ 10 ; 105
Ca2+ concentration: ______in ______out - correct answer ✔✔ 0.001 ; 1.2
if all channels were non -selective, _________ would always occur with no gradients meaning
no membrane potential and excitable tissues would not contract - correct answer ✔✔
equilibrium
only occurs if dead
_______ permeability occurs at ___________ cells. - correct answer ✔✔ selective; excitable
although some channels are selective only for (+) only and transport already occurred, because
opposite charges attract and there are more (-) inside the cell v (+), some (+) cells that moved
out by concentration gradient with actually re-enter the cell to balance out charge - correct
answer ✔✔
equilibrium potential for an ion (Ex) is the _________________ at which the ________________
and ___________forces are equal and opposite - correct answer ✔✔ membrane potential
concentration gradient
electrical
net flux=0
Equilibrium is different for each ion. (T/F) - correct answer ✔✔ true
