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WorksheetsNeuroscience 1 (Winter 2023)
Total questions: 5
Worksheet time: 5mins
What is responsible for the fluctuations in the resting membrane potential of a neuron before an action potential?
voltage-gated sodium channels
the influence of nearby neurons
voltage-gated potassium channels
sodium-potassium pumps
Scientists have discovered a rare condition that causes people to have no chloride channels on their neurons. Which of the following would be true regarding the functioning of the neurons in these people?
Temporal and spatial summation will not occur.
More stimulation will be required to cause the membrane potential to reach the threshold.
Neurons will fire action potentials more often than normal.
Synapses will cause the membrane potential of the presynaptic neuron to increase.
which of the following is correct regarding the process of neurogenesis?
the neural plate curves upwards and begins to form the inside of the neural tube by day 21
the inside of the neural tube forms the inner brain, while the outside of the neural tube forms the cortex
founder cells are on the outside of the neural tube forming the spinal cord
during the entire process of neurogenesis, cell division is symmetrical; each founder cell produces one founder cell and one neuron or glial cell
A neuron at resting potential receives simultaneous stimulation from several different presynaptic neurons. Presynaptic neuron 1 provides an EPSP of 5mV, presynaptic neuron 2 provides an EPSP of 10mV, and presynaptic neuron 3 provides an IPSP of 6mV. Will the neuron fire an action potential?
Due to spatial summation, the neuron will reach threshold and therefore will fire an action potential.
Due to spatial summation, the neuron will not reach threshold and therefore will not fire an action potential.
Due to temporal summation, the neuron will not reach threshold and therefore will not fire an action potential.
Due to temporal summation, the neuron will reach threshold and therefore will fire an action potential.
which of the following is true of synaptic transmission?
a dendrite from the presynaptic neuron transmits its signal to the terminal end of the postsynaptic neuron
an IPSP occurs when the cell depolarizes, making it less likely to fire an action potential
one EPSP causes the neuron to reach threshold and fire an action potential
neurotransmitter binding causes ions to enter the postsynaptic neuron
