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The Brain's Building Blocks - The Amazing Human Brain and Human Development Quiz


 

1. The basic structural units of the human brain are neurons.
The Correct Answer: False
Comment: The basic structural units of the human brain are cells. Neurons are one type of brain cells; glia are another.


2. Glia are specialized cells that work to nourish, support, and complement the activity of neurons in the brain.
The Correct Answer: True
Comment: Maybe someday they will be studied and worked with in the gliosciences!


3. Each brain contains over a million neurons and a billion glial cells, all containing the exact same genetic material.
The Correct Answer: False
Comment: Although neurons and glial cells do contain the exact same genetic material, their numbers are even higher than a million and billion respectively. Remember there are over 100 billion neurons and 1 trillion glial cells in your brain.


4. There are hundreds of "types" of neurons, classifiable by unique structural properties or by unique functional properties.
The Correct Answer: True
Comment: There are indeed hundreds of "types" of neurons, including sensory neurons, motor neurons, and interneurons.


5. Glia comprise only five percent of the cells in the brain.
The Correct Answer: False
Comment: Glia comprise over 90 percent of the brain. Remember, these are the "support" cells.


6. Some glial cells form myelin sheaths, which are fat wrappings (like insulation).
The Correct Answer: True
Comment: Some glial cells do form myelin sheaths, which wrap like insulations around axons and allow them to conduct information more rapidly.


7. A single neuron or a group of neurons can send only one signal to another neuron or group of neurons at a time.
The Correct Answer: False
Comment: In fact, the piece of information that one neuron or one group of neurons can send simultaneous signals to many areas suggests that these nuclei play important roles in orchestrating and coordinating communication and functioning of the brain.


8. Neurons and glial cells are the "building blocks" of brain structure.
The Correct Answer: True
Comment: Neurons and glial cells are the "building blocks" of brain structure, while neuron-to-neuron communication is the basic unit of brain function.


9. Specialized areas of close proximity between neurons designed for communication are called synapses.
The Correct Answer: True
Comment: These areas of close proximity between neurons designed for communication are indeed called synapses.


10. A neurotransmitter is a chemical released from a neuron.
The Correct Answer: True
Comment: A neurotransmitter is indeed a chemical released from a neuron.


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