Topic 3: Neurons and Glia/ Cells and Genetics

Question 1

Golgi

Answer 1

Nervous system composed of a network of interconnected fibers

Question 2

Cajal

Answer 2

Nervous system is made of discrete cells

Question 3

Basic structure of a neuron

Answer 3

1. Dendrites
2. Cell body (Soma)
3. Axon

Question 4

Dendrites

Answer 4

Responsible for gathering information from other neurons

Question 5

Cell body (soma)

Answer 5

Contains the nucleus, responsible for integrating the information

Question 6

Axon

Answer 6

Carries information on to other cells

Question 7

Dendritic spines

Answer 7

• Protrusion from a dendrite that greatly increases its surface area
• Point of contact with axons of other cells

Question 8

Axon hillock

Answer 8

• Junction of the soma & axon

- Where the action potential begins

Question 9

Axon collaterals

Answer 9

• Branches of an axon
• Feedback & modulatory role
• Learning (?)

Question 10

Terminal button/ end foot

Answer 10

• Knob at the tip of an axon that passes information to other neurons

Question 11

Synapse/ Synaptic cleft

Answer 11

• Gap between one neuron and another neuron
• Between terminal button of the axon of one neuron and a dendritic spine of another neuron
• Transfer site between neurons

Question 12

Information flow in a neuron

Answer 12

Dendrite -> Cell body -> Axon hillock -> Axon -> End foot

Question 13

Sensory neurons

Answer 13

Col