List the Three Embryonic Germ Layers and Indicate a Structure

question 48

Essay

List the three embryonic germ layers and indicate a structure that forms from each.

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Definitions:

Transporter Proteins

Proteins that move molecules across cell membranes, playing critical roles in nutrient uptake, neurotransmitter clearance, and waste removal.

Presynaptic Axon

The part of an axon that is situated at the presynaptic side of a synapse, responsible for releasing neurotransmitters.

Neurotransmitter

A chemical substance that transmits signals across a synapse from one neuron to another in the brain and nervous system.

Reuptake

Inactivation of a neurotransmitter when membrane transporter proteins bring the transmitter back into the presynaptic axon terminal for reuse.