Week 2 Neuroscience

True or False: Hyperpolarization of a neuron at resting potential will inhibit an action potential.

• true

• false

Inhibition of calcium from entering the axon terminal could result in which of the following consequences:

• Potassium ion channels pump more Na+ into the extracellular fluid.

• The vesicles containing neurotransmitters are inhibited from releasing their contents into the synaptic cleft.

• The neuron will begin producing more Calcium.

• T-cells deliver Calcium to presynaptic autoreceptors.

True or False: Regions of the body that are more sensitive to touch stimulus are likely to have fewer sensory neurons.

• true

• false

Which of the following methods do neurons use to communicate with other cells?

• Electrical impulses

• Neurotransmitter signaling

• Mechanical stressors

• All of the above

True or False: Neurons with unmyelinated axons have faster action potential propagation compared to myelinated axons.

• true

• false

Which of the following structures is associated with a presynaptic potential, but NOT an action potential?

• Axon Hillock

• Axon

• Dendrite

• Myelin Sheath

True or False: The Sodium-Potassium pump pushes K+ ions out and pulls Na+ ions into the cell.

• true

• false

True or False: Postsynaptic potentials have a varying amplitude (size) which is proportional to the strength of a stimulus, whereas action potentials have a fixed amplitude.

• true

• false

Which of the following conditions occur when one's body produces antibodies that attack part of myelin and disrupts saltatory conduction?

• Synesthesia

• Short Term Memory Loss

• Multiple Sclerosis

• Epilepsy

Which of the following determines a neuron's maximal rate of firing?

• Resting Potential

• Equilibrium Potential

• Calcium Ions

• Refractory Period