catalyst # 14 pg. 71- take out flashcards
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Catalyst # 14 Pg. 71- Take out Flashcards. Go to the class website Open and do the Catalyst: Anatomy: Lesson 79- Catalyst # 14- 3 /20 -3 /21 AND ANATOMY: LESSON 79- Neuron Intro PPT -3 /20 -3 /21. Announcements. Flashcards Due: Next Th /Fri Dissection Date Change: 4/7-4/8 - PowerPoint PPT PresentationTRANSCRIPT
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Catalyst #14 Pg. 71-
Take out Flashcards1. Go to the class websiteOpen and do the Catalyst:Anatomy: Lesson 79- Catalyst #14-3/20-3/21ANDANATOMY: LESSON 79- Neuron Intro PPT-3/20-3/21
Semester 2 Table of Contents
20. Lesson 77- Clinical Diseases Pg. 65-6821. Lesson 78- Clinical Disease (2) Pg. 69-7022. Lesson 79- Neurons Intro Pg. 71-74
Assigned Vocabulary- Due: Next Th/Fri** Definition AND Picture**
27. Neuron28. Axon29. Dendrite30. Myelin sheath31. Nodes of Ranvier32. Axon terminal33. Axon hillock34. Soma35. Sensory neuron36. Motor neuron37. Interneuron
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Announcements
• Flashcards Due: Next Th/Fri• Dissection Date Change: 4/7-4/8• Unit Test: 4/10-4/11• Notebook Check: 4/11
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Neurons SQ3R- Pg.74
• Pg. 897-900 in bio book
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Check It Out First
• https://www.youtube.com/watch?v=ob5U8zPbAX4
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Get Ready for Notes: Pg. 72-73 Title: Neuron Introduction
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What is a Neuron?
• Type of nerve cell that makes up the nervous system
• Humans have about 100 billion neurons!
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Function of Neurons
• To carry electrical messages/signals from the brain to the rest of the body and back to the brain
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3 Types of Neurons
1. Sensory Neuron- Sends signals to the central nervous system (senses)
2. Motor Neuron- sends signals away from the central nervous system
3. Interneuron- connects the different parts of the central nervous system together
https://www.youtube.com/watch?v=r5nMVAjz0d0
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Dendrite Takes information to the cell body. Receives signals from other neurons.
dendrite
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Soma (cell body)Part of the neuron that contains the nucleus.
soma
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Organelle in the neuron that contains genetic material (DNA).
nucleus
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Axon HillockLocated at the end of the cell body and controls the firing of the neuron (action potential).
axon hillock
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axon
AxonTakes information or signals away from the cell body (ex. highway)
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Myelin SheathFatty layer that surrounds some axons in order to conduct faster signals.
Myelin sheath
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Node of RanvierGap in myelin sheath involved in sending messages.
Node of
Ranvier
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Axon TerminalSends information to next step. Part of the neuron that releases neurotransmitters into the synaptic cleft.
Axon terminal
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Neurotransmitters
• Chemicals that move across a small gap called the synapse that communicate a message to another neuron
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Quick Check: What type of neuron sends this signal?
• You will have 15 seconds to choose which neuron you think does that job.
• You are going to write the name of the neuron: motor, sensory, interneuron.
• When I say go, you will show me which neuron type you think does that function.
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Question 1
• The thalamus in the brain sends a signal to the occipital lobe in the brain.
1. Motor Neuron2. Sensory Neuron3. Interneuron
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Question 2
• The chemoreceptors in the tongue taste a sour candy on your tongue.
1. Motor Neuron2. Sensory Neuron3. Interneuron
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Question 3
• The brain stem sends a signal to the spinal cord.
1. Motor Neuron2. Sensory Neuron3. Interneuron
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Question 4
• The spinal cord relays a signal from the brain to the bicep to pick up a heavy bag.
1. Motor Neuron2. Sensory Neuron3. Interneuron
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Question 5
• The mechanoreceptor in the inner ear tells the brain you are listening to the new Drake song.
1. Motor Neuron2. Sensory Neuron3. Interneuron
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Question 6
• The pain receptor in your gluteus maximus tells the brain that you are very sore from running.
1. Motor Neuron2. Sensory Neuron3. Interneuron
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Question 7
• The hypothalamus in the brain sends a signal for your arms to sweat when it’s a really sunny day.
1. Motor Neuron2. Sensory Neuron3. Interneuron
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Question 8
• These neurons are broken after his broken back injury, and Christopher Reeves, Superman, must now remain in a wheelchair.
1. Motor Neuron2. Sensory Neuron3. Interneuron
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How it all works:Reflex Arc- involuntary and nearly instantaneous movement in response to a
stimulus
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Whiteboard Expectations
1. Only write what is asked of you.2. Try every question.3. Take care of our materials.
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Sample Question
• Draw a picture of Phineas Gage.
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Whiteboards
#1
#2
dendrite
axon#3
nucleus
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Whiteboard
Draw a neuron and label the dendrites and axon terminal.
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Whiteboard
Imagine two neurons are sending a message to one another. The message is being sent from the (1) of the first neuron to the (2) of the second.
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Whiteboards…
•Draw a neuron and label the ________________
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Whiteboard
Explain how a message is sent across a neuron. Include as many vocabulary words as possible.
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Whiteboard
Do all messages received by the dendrites get carried forward?
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Whiteboard
Why is a neuron so differently shaped than the “typical” eukaryotic cell you imagine? Hint: form follows function
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Whiteboard
What neuronal structure is really exaggerated in this cell?
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How are you feeling about the parts of a neuron?
1 - 5
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Practice Time- Pg.74