In Vertebrate CNS Neurons, Synapses Are on Dendritic Spines

question 32

Multiple Choice

In vertebrate CNS neurons, synapses are on dendritic spines. Most of the postsynaptic receptors are on the spine head, which are attached to the dendrite through a very small spine neck. What is the consequence of this small neck? Select all that apply.

• A) The creation of independent chemical and electrical compartments.
• B) It creates the ability to modulate synaptic inputs independently.
• C) It traps ions in specific locations in the neuron.
• D) It creates the possibility that synaptic connections will be lost over time as they will break off.

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Definitions:

Styloid Process

The styloid process is a slender, pointed projection of bone that extends from the temporal bone of the skull, where it serves as a point of attachment for muscles associated with the tongue and throat.

Radius

One of the two main bones of the forearm, situated on the lateral side (thumb side) of the arm and plays a crucial role in wrist movement.

Ulna

A long bone in the forearm that runs from the elbow to the smallest finger, forming the elbow joint with the humerus.

Metacarpal

The bones located in the hand between the wrist and the fingers.