Which of the following releases norepinephrine as a neurotransmitter?

Step 1: Define the Problem

Identify which type of neuron or part of the nervous system releases norepinephrine as a neurotransmitter.

Step 2: Break Down the Problem

• Understand the role of norepinephrine in the nervous system.
• Identify the types of neurons or systems that typically release norepinephrine.

Step 3: Apply Relevant Concepts

• Norepinephrine is primarily released by neurons in the sympathetic nervous system.
• It acts as a neurotransmitter in the brain and as a hormone in the body.

Step 4: Analysis, Verify and Summarize

• Sympathetic neurons are part of the autonomic nervous system and are responsible for the "fight or flight" response.
• These neurons release norepinephrine to prepare the body for action.

Final Answer

Sympathetic neurons release norepinephrine as a neurotransmitter.