Choose the One Alternative That Best Completes the Statement or Answers

question 308

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
Complete the identity.
- $$\frac { \sin ^ { 2 } \frac { \theta } { 2 } } { \sin ^ { 2 } \theta } = \text { ? }$$

• A) \(\frac { 1 } { 2 - 2 \cos \theta }\)
• B) \(\frac { 1 } { 2 + 2 \cos \theta }\)
• C) \(\cos ^ { 2 } \frac { \theta } { 2 }\)
• D) \(\sin ^ { 2 } \frac { \theta } { 2 }\)

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Definitions:

Reuptake

A process by which neurotransmitters are absorbed back into a neuron after having been released into a synapse, thus terminating the transmission of signals.

Excitatory PSPs

Excitatory postsynaptic potentials are increases in potential that bring a neuron closer to the threshold for firing, facilitating the transmission of signals.

Inhibitory PSPs

Post-synaptic potentials that make a post-synaptic neuron less likely to generate an action potential.

Absolute Refractory Period

A period immediately following the firing of a nerve fiber when it cannot be stimulated for a brief period, regardless of how strong the incoming stimulus may be.