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after discovering that the shadows outside his window were only the trees in the yard, ralph's blood pressure decreased and his heartbeat slowed. these physical reactions were most directly regulated by hisa.sympathetic nervous system.b.somatic nervous system.c.hippocampus.d.parasympathetic nervous system.
after discovering that the shadows outside his window were only the trees in the yard, ralph's blood pressure decreased and his heartbeat slowed. these physical reactions were most directly regulated by hisa.sympathetic nervous system.b.somatic nervous system.c.hippocampus.d.parasympathetic nervous system.
The physical reactions that are most directly regulated by Ralph's Parasympathetic Nervous System are the decrease inblood pressureand the slowing of his heartbeat.Blood pressure is the force of blood against the walls of arteries. Blood pressure is typically determined by the pumping capacity of the heart and the resistance of the blood vessels. Blood pressure is an essential component of overall physical health.TheParasympathetic Nervous System(PSNS) is part of the autonomic nervous system, and it is responsible for calming the body down after the "fight or flight" response has been triggered by the sympathetic nervous system (SNS).The PSNS works to restore the body's natural equilibrium, which may have been disrupted by the SNS. The PSNS reduces the heart rate, andblood pressure, and stimulates digestion, amongst other things, so it is considered the "rest and digest" system. Since Ralph's blood pressure decreased and hisheartbeat slowed, it suggests that his PSNS was activated by the realization that the shadows he saw outside his window were only the trees in the yard. So, option d is the correct answer.Learn more aboutblood pressure:brainly.com/question/26084631#SPJ11...