Which of the following stimuli would elicit an increase in heart rate and blood pressure?

Question

Quizplus · Accepted Answer

The options provided (A, B, C, D) all involve mechanisms that would typically lead to a decrease in heart rate and blood pressure, not an increase. The rVLM (rostral ventrolateral medulla) is crucial in the regulation of sympathetic nervous activity, which affects heart rate and blood pressure. Decreases in excitatory neurotransmitters (like glutamate), increases in inhibitory neurotransmitters (like GABA), or decreased norepinephrine release would generally reduce sympathetic nervous system activity, leading to lowered heart rate and blood pressure. Similarly, increased stimulation of the cVLM (caudal ventrolateral medulla), which plays a role in inhibiting the rVLM, would also lead to decreased sympathetic outflow and thus lower heart rate and blood pressure.

Which of the Following Stimuli Would Elicit an Increase in Heart