Science is shattering our intuitions about consciousness Annaka Harris

[Uncle Joe]

15. Doesn't the brain operate by chemical reactions?

Yes, the brain operates through a complex interplay of chemical reactions, primarily involving neurotransmitters that facilitate communication between nerve cells (neurons).
Here's a more detailed explanation:
Neurons and Communication:
The brain is composed of billions of neurons, which are specialized cells that transmit information to other cells, muscles, or glands.
Neurotransmitters:
When a neuron needs to communicate with another, it releases chemical messengers called neurotransmitters.
Synapses:
Neurotransmitters travel across a tiny gap called a synapse, where they bind to receptors on the receiving neuron.
Electrical and Chemical Signals:
The process involves both electrical signals within the neuron (axon) and chemical signals (neurotransmitters) between neurons.
Examples of Neurotransmitters:
Some key neurotransmitters include acetylcholine (involved in muscle action and memory), dopamine (associated with pleasure and reward), and serotonin (influences mood and sleep).
Hormones and Brain Function:
Some neurotransmitters, like norepinephrine, also act as hormones and influence mood, stress response, and other bodily functions.
Complex interactions:
The brain uses a complex system of chemical reactions to regulate mood, perception, and behavior.