CAS PS 101 Chapter Notes - Chapter 3: Autonomic Nervous System, Somatic Nervous System, Peripheral Nervous System

• School: Boston University
• Department: Psychological & Brain Sciences
• Course: CAS PS 101
• Professor: Ira Wells

Document Summary

Transmits sensory signals to the cns via nerves. Specialized receptors in the skin, muscles, and joints send sensory info to spinal cord which relays it to brain. Cns send signals through sns to muscles, joints, and skin for movement. Regulates body"s i(cid:374)ter(cid:374)al e(cid:374)viro(cid:374)(cid:373)e(cid:374)t by si(cid:373)ulati(cid:374)g gla(cid:374)ds a(cid:374)d by (cid:373)ai(cid:374)tai(cid:374)i(cid:374)g internal organs (heart) Nerves in ans send somatosensory signals from glands and organs to cns to tell us we are full or how anxious we feel. Sympathetic prepares body for action (dilates pupils, relaxes bronchi, accelerates heartbeat, inhibits digestive activity, contracts vessels) Parasympathetic returns the body back to its resting state (contracts pupils, constricts bronchi, slows heartbeat, stimulates activity, dilates vessels) Endocrine system communication network that influences thoughts, behaviors, and actions. Nervous system is fast and uses electrochemical signals whereas the endocrine is slower and uses hormones. Hormones chemical substances released into the bloodstream by endocrine glands like the pancreas, thyroid, and testes or ovaries.