Examlex
Compare the way most oxygen is carried in the blood with the way most carbon dioxide is carried.
Neurotransmitter
Chemical substances that transmit signals across a synapse from one neuron to another in the nervous system.
Receptors
Proteins found inside or on the cell surface that respond to specific chemical signals by initiating a cellular response.
Inhibitory Synapses
These are the connections between neurons that decrease the likelihood of the recipient neuron firing an action potential.
Endorphins
Natural chemicals in the brain that act as painkillers and mood enhancers, often released during exercise, excitement, pain, and sexual activity.
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