PPT-Nerve Impulses

Membrane Potential difference in electrical charges between inside amp outside of neuron httphigheredmheducationcomsites0072495855studentview0chapter14animationthenerveimpulsehtml. How signals are sent through the nervous system. Synapse. Synapse. = Junction between . two. connecting neurons. Synaptic cleft-between the neurons,. signal has to go across this space. Signals need to be sent . Sensation. Sensory Receptors detect changes in our body and surroundings. Trigger nerve impulses. Travels to CNS for interpretation. Perceive a sensation. Types of Receptors. Chemoreceptors: changes in chemical concentration of substances. 4. th. Year medical Student. Kaylea_clark@yahoo.co.uk. What to do today…. Actually manage to get through everything. Physiology of Breathing. Pneumonia. Eat Chocolate . Lung Cancer. Cystic . Fibrosis. Major Structures. Central Nervous System (CNS):. Brain & Spinal Cord. Peripheral Nervous System (PNS):. Network of nerves & Neural tissues. Major Function: . Sends signals threw the brain and spinal cord to the rest of the body. . Spinal Cord. 2 Spinal . cord dorsal view figure 12.29, pg. 467. . . . 3 Spinal . cord. 4. Gray matter of spinal cord. Dorsal horns – associated with afferent, sensory nerve impulses from receptors, C1-L5 neuron cell bodies bundled in dorsal root ganglion . Follow-Me – . iQuiz. Q. What is the function of the semi-circular canals?. Air. Brings impulses from retina; Brings impulse to brain. Ear. Detect colour. Convert light into nerve impulses; Image forms on it. Spinal Cord. CNS tissue is . _____________________________________ . from the foramen magnum to L. 1. Provides . _______________________________________ to . and from the brain. Protected by bone, . meninges. Chapter 6: The Nervous System. Our nervous system has the ability to simultaneously direct multiple functions taking place in in our bodies.. Two major divisions:. Central nervous system (CNS). . It directs the activity of the entire nervous system.. Resting Membrane Conditions. What is the resting state of a neuron?. When the nerve cell is . not conducting. an impulse it is in resting state. . This makes the membrane of the axon permeable of K. Day 5. Diencephalon. Located between the cerebral hemispheres and above midbrain. Composed largely of gray matter. Surrounds 3. rd. ventricle. Includes:. Thalamus. Hypothalamus. Optic tracts. Optic . Provides links from and to world outside body. All . neural structures outside brain. Sensory receptors. Peripheral nerves and associated ganglia. Efferent motor endings. . Sensory Receptors. Specialized to respond to changes in environment (. Senses –General and Special. General. Visceral sensations. Hunger, thirst. Touch. Touch / tactile, pressure. Temperature. Hot/cold. Pain. Receptors inside and surface of body. Proprioception. Sense of body movement and position. se & T h roat Cente r , PC (586 ) 77 9-7 6 10 www.la ke sho r eent.com In regard to what is commonly felt to be the ear, there is an outer ear, a middle ear and an inner ear. Taking the outer ear Lecture 4. Objective for this lecture. Expound the nerve fiber morphology, its myelination, and the nerve fiber classification. . The nerve: The human nervous system contains about (100 billion) neurons. .