Referring to the figure above, select whether each statement below is true or fa

Question

Referring to the figure above, select whether each statement below is true or false. Resting potential is generated mainly by the outward movement of K+ ions from inside the cell.

true
false
The voltage differences shown in the figure are measured just across the plasma membrane

true
false
The changes in voltage seen at #2 and #4 in the figure are caused by similar movements, in the same direction, of the same types of ions across the membranes.

true
false
The trace in the figure is following the voltage change as it moves down the axon.

true
false
The voltage change shown in the figure is an all-or-nothing response.

true
false
Different ion channels are responsible for generating the voltage change seen at #2 and #4 in the figure.

true
false
All voltage changes in a neuron’s plasma membrane have the characteristic shape shown above.

true
false
The changes in voltage shown in the figure are due to ligand-gated ion channels opening and closing along the axon.

true
false
An EPSP of sufficient strength to reach threshold occurred at #1 on the figure.

true
false
A membrane that has no K+ channels will have a resting membrane potential that is higher than the one shown on the figure.

true
false
2 out of the 10 are wrong! please help me decide the correct answeres! My answeres are 1) T 2) F 3) F 4)F 5)T 6)T 7)F 8) T 9)T 10)T
Verizon 5:36 PM Done Photo 3 2 Threshold of excitation 5 1 -70 Resting potential 5 Time (msec) Biology: How Life Works, Second Edition 2016 WH Freeman and Company

Explanation / Answer

1. Resting potential is generated mainly by the outward movement of K+ ions from inside the cell

This statement is True, because resting potential is generated by the moment of K+ ions from inside to outside, while Na+ ions from outside to inside.

2. The voltage differences shown in the figure are measured just across the plasma membrane

This statement is True, voltage difference is the difference in electric potential between two points

3. The changes in voltage seen at #2 and #4 in the figure are caused by similar movements, in the same direction, of the same types of ions across the membranes.

This statement is False, because change in voltage occurs due to them movement of different type of charged molecules in different directions.

4. The trace in the figure is following the voltage change as it moves down the axon.

This statement is False

5. The voltage change shown in the figure is an all-or-nothing response.

This statement is True, because there is a threshold point for each response. It the neuron reaches that threshold, then only response occurs, otherwise no response occurs.

6. Different ion channels are responsible for generating the voltage change seen at #2 and #4 in the figure.

This statement is True

7. All voltage changes in a neuron’s plasma membrane have the characteristic shape shown above.

This statement is True

8. The changes in voltage shown in the figure are due to ligand-gated ion channels opening and closing along the axon.

This statement is True

9. An EPSP of sufficient strength to reach threshold occurred at #1 on the figure.

This statement is True

10. A membrane that has no K+ channels will have a resting membrane potential that is higher than the one shown on the figure.

This statement is True

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