1 / 10

Communication in the Human Body

Communication in the Human Body. Two Systems. Nervous Fast and short term communication Electrical (neurons) Chemical (neurotransmitters) Endocrine Slow and long term communication Chemical (hormones). Your Senses. What’s Happening. Neuron’s (Cells that make up nerves) 3 parts:

harmon
Download Presentation

Communication in the Human Body

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Communicationin the Human Body

  2. Two Systems • Nervous • Fast and short term communication • Electrical (neurons) • Chemical (neurotransmitters) • Endocrine • Slow and long term communication • Chemical (hormones)

  3. Your Senses

  4. What’s Happening • Neuron’s (Cells that make up nerves) • 3 parts: • Dendrite (where input happens (receptors)) • Cell Body (where organelles are located) • Axon – message is sent down (axon terminal – output) • Neurons are bundled together to make a nerve!

  5. Types of Neurons • Sensory Neuron – organ to central nervous system (CNS) • Interneuron – make up CNS • Motor Neuron – from CNS to organ

  6. Neurons are Specific • Individual Neurons respond to only 1 type of stimulus. • Example Touch (3 types of neurons) • Pressure • Pain • Temperature

  7. How Neurons Work • Neurons are polarized (negative inside and positive outside) • When “fire” they temporarily depolarize • This is propagated down the axon to the axon terminal • All or none (action potential)– either enough stimulus (threshold) for nerve to completely “fire” or does not “fire” at all http://www.youtube.com/watch?v=YwN9aCobCy8

  8. Neurotransmitters • Communication between neurons at the synapse • Small space between axon terminal of one neuron and the dendrites of another. • Are specific – needs to be receptor for neurotransmitter on receiving dendrite • Released triggered by electrical signal. • Re-uptake: Neurotransmitters are reabsorbed and reused http://www.youtube.com/watch?v=90cj4NX87Yk&feature=endscreen&NR=1

  9. 2 categoriesof neurotransmitters • Excite or cause action potential • Inhibit or prevent action potential • Many drugs mimic or act like neurotransmitters

  10. Endocrine System • Chemical messengers • Specific – has to be a receptor for the hormone in order for the cell to respond to it. • Control – normally a negative feedback loop • Some drugs can also mimic hormones

More Related