How Many Half-Lives Has a Fossilized Tree Undergone If It

question 55

Multiple Choice

How many half-lives has a fossilized tree undergone if it contains 12.5% of its original carbon-14?

• A)1\4
• B)2
• C)3
• D)4
• E)16

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Definitions:

IPSPs

Inhibitory postsynaptic potentials, which are synaptic potentials that make a neuron less likely to generate an action potential, often associated with the flow of negative ions into a cell or positive ions out of a cell.

EPSPs

Excitatory Postsynaptic Potentials are electrical charges that increase the likelihood of a neuron firing an action potential.

Temporal Summation

The summing of several postsynaptic potentials produced when a single presynaptic neuron fires multiple times

Spatial Summation

The process by which multiple synaptic potentials combine within one postsynaptic neuron, potentially leading to an action potential.