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Transcript
The Nervous System and the Endocrine System: Communicating Within the Body Chapter 2, Pages 63-70 Essentials of Understanding Psychology- Sixth Edition PSY110 Psychology © Richard Goldman October 4, 2006 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 by using hormones that travel 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 Sensory (afferent) neurons Motor (efferent) neurons – (muscles) Interneuron – connect sensory to motor Peripheral Nervous System Somatic (Voluntary) – Senses & Voluntary Movement Autonomic (Involuntary) – Unconscious bodily functions Sympathetic – Prep the body for emergency (fight or flight) Parasympathetic – Calm the body Nervous System Evolutionary and Behavioral Genetics predisposes people to behave in particular ways or 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 Endocrine System
