Why Is the Effect of Injecting a Pulse of Correct

question 50

Multiple Choice

Why is the effect of injecting a pulse of correct in a dendrite more complex than the one evoked by injecting a pulse of current in a spherical cell?

• A) Because the molecular composition of the dendritic membrane is different from that of a spherical cell, due to the presence of specific types of ion channels.
• B) Because it is not possible to study the biophysical properties of small, sub-cellular compartments like dendrites.
• C) Because the current injected in a dendrite only flows outward through the cell membrane.
• D) Because the cross section of dendrites varies along the length of the dendrite.
• E) Because the dendritic compartment cannot be represented by only one RC circuit as the injected current flows along the length of the dendrite and not just across the membrane.

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Definitions:

Firm-Specific Risk

The portion of a security's risk that is attributable to factors affecting only that company, distinct from market risk.

Unique Risk

Risk that affects a very limited number of assets, often referred to as "unsystematic risk" or "idiosyncratic risk."

Diversifiable Risk

The portion of an investment's risk that can be mitigated or eliminated through portfolio diversification.

Correlation Coefficient

A statistical measure that calculates the strength and direction of a linear relationship between two variables.