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molecules into cells by pressure injection or generating holes can damage cells.

1. Different regions of the brain:

have totally separate functions and do not need to communicate

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send information to each other mediated via individual neurons

send information to each other mediated via simple diffusion

send information to each other through an as yet unknown mechanism

10 points

QUESTION 2

In anterogade neuronal tracing, what part of the cell takes up the tracer?

10 points

QUESTION 3

Delivery of large molecules into cells by pressure injection or generating holes can damage cells. What technology enables an investigator to introduce a tracer into a cell in a less immediately destructive manner?

10 points

QUESTION 4

What other advantages are afforded by the technology in question 3?

10 points

QUESTION 5

What sort of experiment might someone do if they wanted to label only cholinergic neurons (specifically, they might use a particular model animal)?

10 points

QUESTION 6

The neuronal tracing article mentions optogenetically controlled transgenes. What are optogenetically controlled transgenes?

10 points

QUESTION 7

What advance in fluorescent protein technology makes the simultaneous tracing of hundreds of neural connections possible?

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