(PSY 100) Textbook Chapter 3

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All of your thoughts, feelings, and behaviours spring from ______________.

All of your thoughts, feelings, and behaviours spring from cells in the brain.

During the ______, Spanish physician ______________ used a new technique for staining neurons in the brain.

During the 1800s, Spanish physician Santiago Ramón used a new technique for staining neurons in the brain.

Describe the historical discovery of the components of the neuron.

• Who was involved?

• How did it happen?

In the late 1800s…

• Santiago Ramón y Cajala used a new staining technique — the Golgi stain — to visualize neurons

• The Golgi stain was developed by Camillo Golgi

Thanks to the Golgi stain, Ramón discovered that:

• Neurons consist of three basic parts

  • Cell body (soma)

  • Dendrites

  • Axon

• Neurons are individual units (not a continuous web)

• Key Discovery: Neurons don’t touch —> separted by snaptic space

T or F: Neurons are NOT inidivudal units, they are more of a continuous web.

False

Neurons are individual units — there are NOT LIKE A CONTINUOUS WEB

T or F: Neurons don’t touch.

True.

Neurons are separated by a synaptic space.

Neuron

Cell in nervous system that communicates w/ other neurons to perform information-processing tasks.

T or F: Neurons are the only cells in the entire body with a cell body.

False.

ALL ORGAN CELLS have a cell body.

Another name for cell body is “______”.

Another name for cell body is “soma”.

Describe the 3 main parts of the neuron.

1. Cell Body (Soma)

2. Dendrites

3. Axons

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Synapse

Junction/space b/w the axon of one neuron & the dendrites/cellbody of another.

Adjacent neurons are separated by ______________.

Adjacent neurons are separated by synaptic space.

The human brain contains _________ of _________.

The human brain contains trillions of synapses.

Dendrites

Axon

Myelin Sheath

Glial Cells

Multiple Sclerosis (MS)

Name the 3 major types of neurons.

1. Sensory neurons

2. Motor neurons

3. Interneurons

Each type of neuron performs a distinct function.

Each type of neuron performs a distinct function.

Sensory Neuron

• Receives info from external world

• Conveys info to the brain via spinal cord

• Contains

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