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PSY110 Psychology Module 6 – The Nervous System and the Endocrine System: Communicating Within the Body - Pages 63-70 Complexity One neuron may connect to 80,000 other neurons Total neural connection may exceed one quadrillion (1,000,000,000,000,000 – 15 zeros) Endocrine system communicates with hormones through the blood system The Nervous System Central Nervous System (CNS) – Brain & Spinal Cord Peripheral Nervous System – From spinal cord to exremities Spinal Cord Conduit Reflexes o Sensory (afferent) neurons o Motor (efferent) neurons – (muscles) o Interneuron – connect sensory to motor Peripheral Nervous Somatic (Voluntary) – Senses & Vol Movement System Autonomic (Involuntary) – Unconscious bodily functions o Sympathetic – Prep the body for emergency (fight or flight) o Parasympathetic – Calm the body Evolutionary and Genetics predisposes people to behave in particular ways or Behavioral Genetics to have particular characteristics Endocrine System Hormones (chemical messengers) affect function and growth of parts of the body Pituitary (Master Gland) – Regulated by the hypothalamus – Responsible for growth & homeostasis Thyroid (&Parathyroid) – Metabolism Thymus – Immune system Adrenal Gland & Pancreas – Produce Insulin & Glucagon – control sugar metabolism Ovary & Testis – Produce sex hormones 582766876 Page 1 of 1 Richard Goldman