Neuroscience Quiz

Glial cells:

• Conduct electrical impulses

• Provide structural and metabolic support to neurons

• Are a type of sensory neuron

• Store neurotransmitters

Which of the following statements is TRUE regarding the Sympathetic Nervous system?

• It decreases heart rate

• It dilates pupils

• It increases digestive activity

• It controls voluntary muscle movement

Repolarization or the falling phase of the action potential is due to:

• Opening of sodium channels

• Efflux of potassium ions (K⁺)

• Influx of calcium ions (Ca²⁺)

• Closure of all ion channels

Calcium is important in the synapse because it:

• Blocks neurotransmitter release

• Triggers neurotransmitter release

• Acts as a neurotransmitter

• Closes ion channels

At negative 50mv sodium channels open allowing sodium to enter the cell. During what phase of the action potential does this occur?

• Hyperpolarization

• Repolarization

• Depolarization

• Resting potential

The portions of a neuron that extend off of the roughly spherical cell body are usually collectively called:

• Axons and dendrites

• Nuclei

• Synaptic terminals

• Mitochondria

Neurotransmitter is stored and released from:

• The dendrites

• The cell body

• Synaptic vesicles

• The nucleus

The afferent and efferent neurons together form the:

• Central nervous system

• Peripheral nervous system

• Autonomic nervous system

• Somatic nervous system

In general, the nervous system is made up of which two types of cells?

• Neurons and glial cells

• Neurons and muscles

• Glial cells and connective tissue

• Glial cells and endocrine cells

The collection of axons that carries information between the central nervous system and the peripheral effectors is called the:

• Ganglia

• Nerve

• Neuron

• Synapse