Brain Bee Bootcamp | Lecture 2

How many miles of axons are in the human brain?

• 100 miles

• 1,000 miles

• 100,000 miles

• 1 million miles

What part of a neuron is sometimes compared to tree branches?

• Axon

• Dendrites

• Soma

• Synapse

If you stacked all the neurons in your brain end-to-end, how far would they reach?

• To the Moon

• Across the U.S.

• Around the Earth twice

• Past the Sun

What “highway system” in neurons transports packages of proteins?

• Cytoskeleton superhighway

• Axonal expressway

• Neural nanorails

• Kinesin conveyor belt

What “tiny truck” carries materials along axons?

• Dynein and kinesin

• Microtubules

• Neuroblobs

• Axoplasmic carriers

What do neurons do if they get too many signals at once?

• Fire extra action potentials

• Take a nap

• Stop responding (become refractory)

• Send backup signals

Why are neurons like batteries?

• They store energy as ATP

• They maintain a voltage difference

• They’re both rechargeable

• All of the above

What makes action potentials travel faster on some axons?

• High voltage

• Smooth surfaces

• Myelin insulation

• Bigger axons

Which glial cells could be considered the brain's "janitors"?

• Astrocytes

• Oligodendrocytes

• Microglia

• Schwann cells

Which glial cell can connect to 50 axons at once?

• Schwann cell

• Astrocyte

• Oligodendrocyte

• Satellite cell