Bio 109 Quiz 6 Questions and Answers
100% Pass
A change in the membrane potential of a neuron from a value of -70 mV to a value of -
60 mV would be called: - ✔✔Depolarization
Which of the following statements concerning the propagation of action potential is
incorrect? - ✔✔Strong stimuli generate stronger action potentials than weaker stimuli.
In a neuron, resting potential is maintained by maintaining a gradient of: -
✔✔Potassium and Sodium ions
Which of the following is a direct result of depolarizing the presynaptic membrane of
an axon terminal? - ✔✔Voltage-gated calcium channels in the membrane open.
Assume that a single IPSP has a negative magnitude of -0.5 mV at the axon hillock, and
that a single EPSP has a positive magnitude of +0.5 mV. For a neuron with an initial
membrane potential of -70 mV, the net effect of the simultaneous arrival of 2 IPSPs and
6 EPSPs would be to move the membrane potential to - ✔✔-68 mV
The following steps refer to various stages in transmission at a chemical synapse.
1. Neurotransmitter binds with receptors associated with the postsynaptic membrane.
2. Calcium ions rush into neuron's cytoplasm.
3. An action potential depolarizes the membrane of the presynaptic axon terminal.
4. The ligand-gated ion channels open on the post synaptic membrane.
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 1
100% Pass
A change in the membrane potential of a neuron from a value of -70 mV to a value of -
60 mV would be called: - ✔✔Depolarization
Which of the following statements concerning the propagation of action potential is
incorrect? - ✔✔Strong stimuli generate stronger action potentials than weaker stimuli.
In a neuron, resting potential is maintained by maintaining a gradient of: -
✔✔Potassium and Sodium ions
Which of the following is a direct result of depolarizing the presynaptic membrane of
an axon terminal? - ✔✔Voltage-gated calcium channels in the membrane open.
Assume that a single IPSP has a negative magnitude of -0.5 mV at the axon hillock, and
that a single EPSP has a positive magnitude of +0.5 mV. For a neuron with an initial
membrane potential of -70 mV, the net effect of the simultaneous arrival of 2 IPSPs and
6 EPSPs would be to move the membrane potential to - ✔✔-68 mV
The following steps refer to various stages in transmission at a chemical synapse.
1. Neurotransmitter binds with receptors associated with the postsynaptic membrane.
2. Calcium ions rush into neuron's cytoplasm.
3. An action potential depolarizes the membrane of the presynaptic axon terminal.
4. The ligand-gated ion channels open on the post synaptic membrane.
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 1
