BI121 GRCC SPOs: Muscular System
Actual Exam Questions With Reviewed
100% Correct Detailed Answers
Guaranteed Pass!!
1. What is resting potential? - ANSWER A cell at rest maintaining a state of
tension.
2. What ion distribution is characteristic of resting potential? - ANSWER
More Na+ outside the cell and more K+ inside the cell.
3. What is the typical voltage of a cell's resting potential? - ANSWER -
70mV inside the cell.
4. What effect does the ion distribution have on the charge of the cell? -
ANSWER The outside of the cell is more positive and the inside is more
negative.
5. What are leaky channels? - ANSWER Channels that allow ions to pass
through the cell membrane, affecting resting potential.
6. Sodium-Potassium Pump - ANSWER Ion exchanger; Pump 3 Na+ out for
every 2 K+ in
,7. Consequence of Sodium-Potassium Pump - ANSWER It maintains more
Na+ outside and more K+ inside (establish a concentration gradient)
Keeps the inside more negative and the outside more positive
8. Action Potential - ANSWER Rapid change in the cells membrane
electrical potential
9. Voltage sensitive - ANSWER When the axon hillock reaches threshold of
-60mV all sodium gates in the area open
10.Voltage-Dependant Gating - ANSWER Membrane gates open up when a
threshold/specific voltage is achieved (Axon/Hillock)
11.Ligand-Dependant Gating - ANSWER When a specific molecule binds to
a receptor in the membrane, gates will open
12.Mechanically Gated Channels - ANSWER Movement of cells open the
gates
13.Temperature Gate Channels - ANSWER Change in temperature opens
the gates
, 14.Excitatory Post-Synaptic Potential (EPSP) - ANSWER A post synaptic
potential that depolarizes the neuronal membrane, making the cell more
likely to fire an action potential.
15.Inhibitory Post-Synaptic Potential (IPSP) - ANSWER Tells the cell not to
fire
16.Temporal - ANSWER how strong they are
17.Spatial - ANSWER Add up the signal at every synapse (excite or inhibit)
18.Polarization - ANSWER Resting state of a neuron
19.Depolarization - ANSWER The process during the action potential when
sodium is rushing into the cell causing the interior to become more positive.
20.Repolarization - ANSWER Return of the cell to resting state, caused by
reentry of potassium into the cell while sodium exits the cell.
21.Hyperpolarization - ANSWER The movement of the membrane
potential of a cell away from rest potential in a more negative direction.
22.Synapes - ANSWER Space between the knob and next cell membrane.
Neurotransmitter is released to bind to receptors to instruct the next cell on
the other side of the synapse
Actual Exam Questions With Reviewed
100% Correct Detailed Answers
Guaranteed Pass!!
1. What is resting potential? - ANSWER A cell at rest maintaining a state of
tension.
2. What ion distribution is characteristic of resting potential? - ANSWER
More Na+ outside the cell and more K+ inside the cell.
3. What is the typical voltage of a cell's resting potential? - ANSWER -
70mV inside the cell.
4. What effect does the ion distribution have on the charge of the cell? -
ANSWER The outside of the cell is more positive and the inside is more
negative.
5. What are leaky channels? - ANSWER Channels that allow ions to pass
through the cell membrane, affecting resting potential.
6. Sodium-Potassium Pump - ANSWER Ion exchanger; Pump 3 Na+ out for
every 2 K+ in
,7. Consequence of Sodium-Potassium Pump - ANSWER It maintains more
Na+ outside and more K+ inside (establish a concentration gradient)
Keeps the inside more negative and the outside more positive
8. Action Potential - ANSWER Rapid change in the cells membrane
electrical potential
9. Voltage sensitive - ANSWER When the axon hillock reaches threshold of
-60mV all sodium gates in the area open
10.Voltage-Dependant Gating - ANSWER Membrane gates open up when a
threshold/specific voltage is achieved (Axon/Hillock)
11.Ligand-Dependant Gating - ANSWER When a specific molecule binds to
a receptor in the membrane, gates will open
12.Mechanically Gated Channels - ANSWER Movement of cells open the
gates
13.Temperature Gate Channels - ANSWER Change in temperature opens
the gates
, 14.Excitatory Post-Synaptic Potential (EPSP) - ANSWER A post synaptic
potential that depolarizes the neuronal membrane, making the cell more
likely to fire an action potential.
15.Inhibitory Post-Synaptic Potential (IPSP) - ANSWER Tells the cell not to
fire
16.Temporal - ANSWER how strong they are
17.Spatial - ANSWER Add up the signal at every synapse (excite or inhibit)
18.Polarization - ANSWER Resting state of a neuron
19.Depolarization - ANSWER The process during the action potential when
sodium is rushing into the cell causing the interior to become more positive.
20.Repolarization - ANSWER Return of the cell to resting state, caused by
reentry of potassium into the cell while sodium exits the cell.
21.Hyperpolarization - ANSWER The movement of the membrane
potential of a cell away from rest potential in a more negative direction.
22.Synapes - ANSWER Space between the knob and next cell membrane.
Neurotransmitter is released to bind to receptors to instruct the next cell on
the other side of the synapse
