Examlex
The following statements describe...
o The teacher and learner are physically separated.
o An organized instructional program is delivered.
o Two-way communication is made possible by means of technological media.
Neurotransmitter
Chemical messengers that transmit signals across a chemical synapse, from one neuron to another 'target' neuron.
Epinephrine
A hormone also known as adrenaline, released by the adrenal glands, increasing heart rate and blood pressure, and preparing the body for a swift response during stress or threat.
Norepinephrine
A neurotransmitter and hormone involved in the body's fight or flight response, affecting attention and responding actions.
Adrenaline
A hormone and neurotransmitter also known as epinephrine, released in response to stress or excitement, causing increased heart rate and energy.
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