ACADEMIC EVALUATION SCRIPT 2026
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◉ Neuron. Answer: a specialized cell transmitting nerve impulses; a
nerve cell
◉ Sensory neurons. Answer: a neuron conducting impulses inwards to
the brain or spinal cord
◉ Motor neurons. Answer: a nerve cell forming part of a pathway along
which impulses pass from the brain or spinal cord to a muscle or gland
◉ Interneurons. Answer: a neuron that transmits impulses between other
neurons, especially as part of a reflex arc
◉ Synapse. Answer: a junction between two nerve cells, consisting of a
minute gap across which impulses pass by diffusion of a
neurotransmitter
◉ Dendrite (receive). Answer: a short branched extension of a nerve
cell, along which impulses received from other cells at synapses are
transmitted to the cell body.
,◉ Axon (relay). Answer: the long threadlike part of a nerve cell along
which impulses are conducted from the cell body to other cells
◉ Myelin sheath. Answer: a fatty white substance that surrounds the
axon of some nerve cells, forming an electrically insulating layer
◉ Action potential. Answer: a neural impulse; a brief electrical charge
that travels down an axon. The action potential is generated by the
movement of positively charged atoms in and out of channels in the
axon's membrane.
◉ Threshold. Answer: The level of stimulation required to trigger a
neural impulse
◉ Neurotransmitter. Answer: a chemical substance that is released at the
end of a nerve fiber by the arrival of a nerve impulse and, by diffusing
across the synapse or junction, causes the transfer of the impulse to
another nerve fiber, a muscle fiber, or some other structure.
◉ Endorphins. Answer: a natural, opiate-like neurotransmitters linked to
pain control and to pleasure.
◉ Dopamine. Answer: a neurotransmitter associated with movement,
attention and learning and the brain's pleasure and reward system
, ◉ Seratonin. Answer: a neurotransmitter that regulates mood, appetite,
sleep, muscle contraction, and some cognitive functions including
memory and learning. Lack of this can cause depression.
◉ Acetylcholine. Answer: a neurotransmitter that enables learning and
memory and also triggers muscle contraction
◉ Norepinephrine. Answer: a hormone that is released by the adrenal
medulla and by the sympathetic nerves and functions as a
neurotransmitter. It is also used as a drug to raise blood pressure
◉ Gamma-amino Butyric acid (GABA). Answer: is an amino acid
which acts as a neurotransmitter in the central nervous system. It inhibits
nerve transmission in the brain, calming nervous activity
◉ Glutamate. Answer: major excitatory neurotransmitter involved in
memory. An excess can cause migraines or seizures
◉ Reuptake. Answer: a neurotransmitter's re-absorption of the sending
neuron
◉ Agonist molecules. Answer: a molecule from outside the body that is
similar enough to a neurotransmitter to mimic its effects, like in certain
opiate drugs