The neurone Learning objectives: Explain how the neurone is adapted for its function

Label a neurone using key words e.g. axon, mylein sheath, dendrites Describe the role of a neurone/nerve cell in the nervous system. Name three examples of neurone Explain how the neurone is adapted to its function Learning Outcomes

Think – Pair – Share Elicit How is this cell the same as an animal cell? Different to an animal cel?

The brain can respond to touch, smell or taste stimuli in just 0.1 seconds, but sound and vision take longer. How fast are electrical signals? Nerve impulses travel at up to 320 mph and take just 0.02 seconds to reach the brain. Initiate Engage

What are neurones? Neurones are specialized cells that conduct electrical impulses through the body. nerve fibre A nerve is a bundle of many nerve fibres enclosed within a protective sheath. Nerve fibres are the long axons of neurones together with any associated tissues. nerve

Make a model neurone -work in groups of 4 -use the resources available to create a poster and model -you will be judged according to our success criteria: 1) Scientific accuracy of model and explanation of how it is adapted for its function 2) Aesthetic appearance 3) Teamwork Explore

Team number Scientific accuracy Aesthetic appearance Teamwork Total 3 = excellent 2 = good 1 = satisfactory

What do neurones look like? The axons of most neurones are wrapped in an insulating lipid layer called the myelin sheath. Why is this important? Thin projections called dendrites extend from the cell body and connect with other neurones, allowing electrical impulses to pass from one to the other. Neurones are elongated cells consisting of a cell body and long, thin axon. myelin sheath axon cell body dendrites Explain

What are sensory neurones? Sensory neurones transmit messages from sense receptors, such as the eye or nose, to the brain or spinal cord. cell body nerve impulse from sense organ nerve impulse to CNS

What are motor neurones? Motor neurones transmit messages from the brain and spinal cord to the muscles and glands. cell body muscle

Neurones link receptor cells to effector cells.

Label the neurone- Summarising what you have learnt. Write down how it is adapted to its function Elaborate-demonstrate learning

Dendrite Nucleus Nerve Ending Axon Cell Membrane Cytoplasm The cytoplasm is shaped into a long axon to transmit electrical impulses between central nervous system and effector Fatty sheath acts as an electrical insulator of the axons, and speed up transmission of electrical impulses. Branched endings make connections with other neurons or effectors. Self assess

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The Nervous System – Interactive activity Extend

Label a neurone using key words e.g. axon, mylein sheath, dendrites Describe the role of a neurone/nerve cell in the nervous system. Name three examples of neurone Explain how the neurone is adapted to its function Learning Outcomes Evaluate