Final answer:
Dopamine is a neurotransmitter with various roles, including motor control and emotional response, but is not primarily associated with stress. It allows the transmission of impulses across the synapse, making option D the correct answer.
Step-by-step explanation:
Epinephrine and norepinephrine are hormones associated with the body's stress response, often referred to as the 'fight or flight' response. These hormones are released by the adrenal medulla, and they prepare the body to react to stressful situations by increasing heart rate, constricting blood vessels, and halting functions like kidney processes that are non-essential in a crisis.
Dopamine, on the other hand, is a neurotransmitter with several important roles within the brain and body, including those related to pleasure, motivation, and motor control.
It is not primarily associated with stress reactions, but rather has functions that affect the reward system and help regulate movement and emotional responses. It also plays a role in the transmission of impulses across synapses between neurons in the brain.
Considering the options provided, the function of Dopamine is most accurately described as 'Allows the transmission of impulses across the synapse' (D). It binds to G-protein-linked receptors, which can trigger an increase in the second messenger cAMP within the target neuron, ultimately influencing neuronal activity and response.
The correct option is D. Allows the transmission of impulses across the synapse."