After drinking several cups of strong coffee, a person develops "coffee nerves" or "jitters." This probably is due to the ability of caffeine to ________.

A) block adenosine receptor sites
B) cause neurotransmitters to leak out of the synaptic vesicles and be destroyed by enzymes
C) cause an increase in the release of excitatory neurotransmitters
D) inhibit enzymes which break down excitatory neurotransmitters

Adenosine Receptor Sites

Specific cellular locations where adenosine can bind, influencing various physiological processes.

Caffeine

A stimulant found in coffee, tea, chocolate, and some medications, known for its effects on increasing alertness and reducing fatigue.

Excitatory Neurotransmitters

Chemical substances released by neurons to transmit signals across synapses, promoting the firing of action potentials in receiving neurons, thus facilitating brain and nervous system activity.