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NERVOUS SYSTEM II

PP 1016-1024. Nervous System Part II. NERVOUS SYSTEM II. TYPES OF NEURONS. sensory – sense organs/receptors to CNS. motor – carry information from CNS to muscles and glands interneurons – connect sensory and motor and carry impulses between them. NERVE IMPULSES. An electrical impulse

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NERVOUS SYSTEM II

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  1. PP 1016-1024 Nervous System Part II NERVOUS SYSTEM II

  2. TYPES OF NEURONS • sensory – sense organs/receptors to CNS. • motor – carry information from CNS to muscles and glands • interneurons – connect sensory and motor and carry impulses between them.

  3. NERVE IMPULSES • An electrical impulse • Resting potential: inactive due to “negatively” charged inside as compared to impulse • Action potential: helps the transmission of an electrical impulse by making inside more “positive”

  4. NERVE IMPULSES • When the impulse reaches terminal neurotransmitters are released into synaptic cleft

  5. Effect of drugs on the nervous system • Drug: chemical compound that affects the body

  6. Drugs may…. • Prevent re-uptake of neurotransmitters • Over stimulation of nervous system • Mimicking neurotransmitters

  7. Sensory Receptors • Neuron that detects stimuli.

  8. Mechanoreceptors • Detect pressure and movement • Sense: Hearing and touch

  9. Thermoreceptor • Detect temperature

  10. Pain receptor • Detect tissue damage

  11. Chemoreceptors • Respond to chemicals • Sense: Smell and taste

  12. Photoreceptor • Respond to variation in light • Sense: sight

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