Fundamental Structures of a Neuron
Neuronal Communication
Methods Used to Study the Brain
100

Often sheathed in myelin, this structure carries impulses down the neuron and can range anywhere from zero to several meters in length.

What is an axon?

100

These ions are responsible for creating a potential difference across a neuron, which can depolarize rapidly, leading to a signal to travel through the neuron.

What are Na+, K+, and Cl-?

100

Can identify the regions of the brain that show significant metabolic activity changes in response to a task.

What is functional magnetic resonance imaging (fMRI)?

200

Provides structural, nutritional, and “medical” support for neurons. Sometimes participates in signaling processes.

What are glial cells?

200

This voltage is the threshold for an action potential to take place.

What is around -55 mV?

200

Can show the order that different parts of a system are activated in processing a specific stimulus.

What is an electroencephalogram (EEG) test?

300

This type of neuron can be found in Locusts or in the sensory system, and features only one neurite extending from the body.

What is

300

This type of biological structure is responsible for signalling across a chemical synapse.

What is a neurotransmitter?

300

Observing the absorption rate of the radioactivity allows a doctor or researcher to discover the activity levels and functionality of any part of the brain during this method.

What is positron emission tomography (PET)?