How Many Different Transmitter Chemicals Are Found in the Brain

question 414

Multiple Choice

How many different transmitter chemicals are found in the brain?

• A)fewer than 10
• B)approximately 25
• C)approximately 50
• D)more than 100

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Definitions:

Autonomic Reflexes

Reflex actions within the body that are involuntarily controlled by the autonomic nervous system, influencing functions such as heart rate and digestion.

Stretch Reflexes

The muscle contraction in response to stretching within the muscle, a mechanism known to maintain muscle tone.

Withdrawal Reflexes

Automatic, quick responses of the body part to a painful stimulus, resulting in pulling away from the source of pain to prevent injury.

Polysynaptic

Involving multiple synapses between more than two neurons in a reflex or neural pathway.