nervous16ab.notebook March 23, 2018 What are the 3 parts of the NERVOUS SYSTEM? Nervous System Nerve Cells Neuron Receptors Effectors Receptor -organs or cells that detect stimuli and convert the stimuli to impulses. Effector A structure that carries out the response to a stimulus [Example: Muscle& Gland] Mar 13 ­ 7:52 PM 1 nervous16ab.notebook March 23, 2018 Sense organs and receptors The five sense organs: 1)____________Ear [cochlea] [mechanoreceptor 2)____________Mouth [tastebuds] [Chemoreceptors] Eyes [Retina] 3)____________ [Photoreceptor] [thermo­Receptors Skin 4)____________Pressure Receptors https://www.youtube.com/watch?v=E4Ep1atfFlg Pain Receptors 5)_____________ Mar 13 ­ 8:06 PM 2 nervous16ab.notebook March 23, 2018 Stimulus Receptor Effector (light) (cells in the eye) Effectors: muscles or glands that respond to nervous impulses Mar 13 ­ 8:16 PM 3 nervous16ab.notebook March 23, 2018 There are three types of neurons 1)Sensory Neuron­ carries impulses from the sense organs to the spinal cord or brain. (CNS) 2) Motor Neuron­ carries impulses from the brain and spinal cord to muscles and glands(effectors) 3) Interneurons ­connect sensory and motor neurons and carry impulses between them. Most are located in the brain and spinal cord(CNS) Mar 13 ­ 8:41 PM 4 nervous16ab.notebook March 23, 2018 Mar 22­1:39 PM 5 nervous16ab.notebook March 23, 2018 What is a nerve? A bundle of neurons surrounded by connective tissue Mar 4­12:36 PM 6 nervous16ab.notebook March 23, 2018 Human Nervous System Central Nervous Peripheral Nervous System System consists of consists of The Brain and Spinal All nerves outside the CNS. Sensory and Motor Cord Neurons All Nerves that come off the brain & spinal cord -cranial nerves -Nerves coming off the brain -spinal nerves -Nerves coming off the spinal cord Mar 15 ­ 7:19 PM 7 nervous16ab.notebook March 23, 2018 What are the 2 DIVISIONS of the Nervous System ? Mar 15 ­ 7:08 PM 8 nervous16ab.notebook March 23, 2018 Central Nervous System What protects the brain? l. Skull -bone 2. Meninges membranes that protect the brain 3. Cerebrospinal fluid fluid surrounding brain &sp. cord that protects & nourishes the brain Feb 27­8:37 PM 9 nervous16ab.notebook March 23, 2018 Brain Cerebrum Cerebellum Medulla Oblongata Mar 15 ­ 7:27 PM 10 nervous16ab.notebook March 23, 2018 Cerebrum: • the largest part of the brain. • Center for thinking, memory and voluntary activities, and senses Mar 15 ­ 7:36 PM 11 nervous16ab.notebook March 23, 2018 Mar 17­2:41 PM 12 nervous16ab.notebook March 23, 2018 Cerebellum: • coordinates motor activities • helps maintain balance Mar 15 ­ 7:40 PM 13 nervous16ab.notebook March 23, 2018 Medulla Oblongata: controls many involuntary activities including breathing, heartbeat, and blood pressure Mar 15 ­ 7:42 PM 14 nervous16ab.notebook March 23, 2018 hypothalamus- Link between the nervous and endocrine system -helps regulate body Temperature -It helps to regulate appetite, thirst Blood pressure, sleep, and emotions Mar 6­11:38 AM 15 nervous16ab.notebook March 23, 2018 Thalamus consciousness, sleep, and sensory interpretation. Mar 17­8:06 AM 16 nervous16ab.notebook March 23, 2018 Spinal Cord 1) vertebrae (bones) What protects the spinal cord? 2) meninges (membranes) 3) Cerebrospinal fluid. Feb 27­8:44 PM 17 nervous16ab.notebook March 23, 2018 Spinal Cord: A Thick nerve a) It carries nerve impulses between the brain and other structures of the body. b) controls certain reflexes (automatic responses to stimuli) Mar 19 ­ 2:52 PM 18 Attachments Neurons_.asf The_Poli.asf.