Learning Objective To learn the biological content of dream analysis. To understand what a neuron consists of and label a diagram.

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Presentation transcript:

Learning Objective To learn the biological content of dream analysis. To understand what a neuron consists of and label a diagram.

Neurons A cell in the body that sends electrical and chemical messages.

Neurons 4. Terminal branches 1. Dendrites 2. Cell body 3. Axon 5. Synaptic gap

1. Dendrites Neurons 4. Terminal branches 2. Cell body 3. Axon 5. Synaptic gap

Dendrites Dendrites receive stimulation in order for the cell to become active. They conduct electrical messages to the neuron cell body for the cell to function.

Neurons 2. Cell body 4. Terminal branches 1. Dendrites 3. Axon 5. Synaptic gap

Cell Body The cell body connects to the dendrites, which bring information to the neuron, and the axon, which sends information to other neurons.

Neurons 3. Axon 4. Terminal branches 1. Dendrites 2. Cell body 5. Synaptic gap

Axon The Axon is a cell body of a neuron. It transfers a nerve impulse from the nerve cell body to a synapse with another cell.

Neurons 4. Terminal branches 1. Dendrites 2. Cell body 3. Axon 5. Synaptic gap

Terminal Branches The very end of a branch of a nerve's axon, a long slender nerve fiber that conducts electrical signals to a nerve synapse.

Neurons 5. Synaptic gap 4. Terminal branches 1. Dendrites 2. Cell body 3. Axon

Synaptic Gap The gap between the dendrites of one neuron and the next.

Other Key Works Impulse: electrical signal Neurotransmitter: chemical released by impulse Synaptic transmission: when a neurotransmitter crosses the synaptic gap

How the brain send signals Step 1. An electrical impulse is triggered from the cell of one neuron then travels down the axon to the end. Step 2. When the impulse gets to the end of the axon it releases a chemical, called a neurotransmitter. Step 3. This neurotransmitter has to cross a gap, called the synapse or synaptic gap, to get to the dendrites of the next neuron to continue the message. Step 4. The neurotransmitter, released by the impulse, goes into the gap - where it could be taken up by the dendrites or could be lost Step 5. If the receptors at the dendrites of the next neuron are ‘suitable’ to receive the neurotransmitter that is in the gap, then the chemical gets picked up. Step 6. The neurotransmitter sets off an electrical signal and then it drops back into the synaptic gap where it can be taken back up to be used again. Step 7. The receptors trigger an electrical impulse from the cell body, which then travels down to the end of the axon….return to step 1.(cycle)

TASK Competition time…

HOMEWORK Planners out… 1. Revision for your ASSESSMENT next lesson. 2 HOMEWORK Planners out… 1. Revision for your ASSESSMENT next lesson. 2. Make sure your book is up to date for marking.