In This Universe, One Can Consider Four Different Regimes of Space

question 7

Multiple Choice

In this universe, one can consider four different regimes of space in which distances between objects might be changing as a result of the general expansion of the universe: (1) distances between different parts of Earth, (2) distances between planets in the solar system, (3) distances between stars in the Milky Way Galaxy, and (4) distances between superclusters of galaxies. In which of these regimes are the distances changing because of the universal expansion?

• A) 4 and 3
• B) 4, 3, 2, and 1
• C) 4, 3, and 2
• D) 4 only

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Definitions:

Centre-surround

A term most often used in neuroscience that describes how certain neurons in the visual system are organized to respond differentially to light in the center of their receptive field compared to the surround area.

Receptive Field

A receptive field is the specific region of sensory space (e.g., visual or auditory) in which a stimulus will modify the firing of a particular neuron.

Inhibitory Synapse

A type of synaptic connection that decreases the likelihood of the receiving neuron firing an action potential.

Excitatory Synapse

A synapse at which an action in the presynaptic neuron increases the probability of an action potential occurring in the postsynaptic cell, typically by releasing neurotransmitters.