Final answer:
Thiopental causes a decrease in SVR by dilating blood vessels and reducing resistance to blood flow.
Step-by-step explanation:
The effect of thiopental on Systemic Vascular Resistance (SVR) is that it causes a decrease in SVR. Thiopental is a barbiturate medication used for anesthesia induction. It produces a sedative effect and decreases the activity of the central nervous system.
Thiopental acts primarily on GABA receptors in the brain, which are inhibitory neurotransmitters. By enhancing the effects of GABA, thiopental reduces neuronal activity and produces sedative, hypnotic, and anticonvulsant effects.
In terms of SVR, thiopental causes dilation of blood vessels, leading to a decrease in resistance to blood flow. This results in reduced SVR, which can lead to a drop in blood pressure.