See some synapses "Up Close and Personal". Play the Interactive Word Search Game on the neuron and neurotransmitters. Play an Outside Game to reinforce what you have learned about the synapse. Color the synapse online: Picture 1 Picture 2. The Synapse Neurons have specialized projections called dendrites and axons. The synapse consists of: a presynaptic ending that contains neurotransmitters , mitochondria and other cell organelles a postsynaptic ending that contains receptor sites for neurotransmitters a synaptic cleft or space between the presynaptic and postsynaptic endings.
Neurotransmitter Mobilization and Release At the synaptic terminal the presynaptic ending , an electrical impulse will trigger the migration of vesicles the red dots in the figure to the left containing neurotransmitters toward the presynaptic membrane.
Biopsychology: Synaptic Transmission Study Notes. Assessment Mats Assessment mats provide a structured approach for students to revise key topic areas - an ideal revision tool as well as homework or lesson activity.
Added to your Shopping Cart! Continue shopping. Revision Guides Printed revision guides to support effective preparation for important exams. Student Workbooks Printed workbooks designed to support students throughout their course. Teaching PowerPoints Collections of editable PowerPoints covering the key specification and unit content. What happens to neurotransmitters after synaptic transmission and why does this need to happen?
Why is a chemical synaptic transmission unidirectional? What are some reasons that synaptic transmissions might not work correctly? What channels in the presynaptic neuron open up in response to an action potential? An action potential, or spike, causes neurotransmitters to be released across the synaptic cleft, causing an electrical signal in the postsynaptic neuron.
Axon — The long, thin structure in which action potentials are generated; the transmitting part of the neuron. After initiation, action potentials travel down axons to cause release of neurotransmitter.
Dendrite — The receiving part of the neuron. Dendrites receive synaptic inputs from axons, with the sum total of dendritic inputs determining whether the neuron will fire an action potential.
Spine — The small protrusions found on dendrites that are, for many synapses, the postsynaptic contact site. Membrane potential — The electrical potential across the neuron's cell membrane, which arises due to different distributions of positively and negatively charged ions within and outside of the cell.
The value inside of the cell is always stated relative to the outside: mV means the inside is 70 mV more negative than the outside which is given a value of 0 mV. An action potential travels the length of the axon and causes release of neurotransmitter into the synapse. The action potential and consequent transmitter release allow the neuron to communicate with other neurons.
0コメント