Synapses

A junction at which a neuron meets another cell.

(a)  

• Chemical-gated ion channels causes ions to move across the cell membrane of the postsynaptic cell which produce or suppress action potential.

• Vesicles releases neurotransmitter molecules into the synaptic cleft.

• Neurotransmitter molecules bind to receptor proteins on the postsynaptic cell.

• Neurotransmitter molecules diffuse across the synaptic cleft and interact with the postsynaptic cell.

• Neurotransmitter molecules do not remain in the synaptic cleft indefinitely. It is either reabsorbed by the presynaptic cell or broken down by the enzymes in the synaptic cleft.

• Chemical-gated ion channels causes ions to move across the cell membrane of the postsynaptic cell which produce or suppress action potential.

• Vesicles releases neurotransmitter molecules into the synaptic cleft.

• Neurotransmitter molecules bind to receptor proteins on the postsynaptic cell.

• Neurotransmitter molecules diffuse across the synaptic cleft and interact with the postsynaptic cell.

• Neurotransmitter molecules do not remain in the synaptic cleft indefinitely. It is either reabsorbed by the presynaptic cell or broken down by the enzymes in the synaptic cleft.

• Chemical-gated ion channels causes ions to move across the cell membrane of the postsynaptic cell which produce or suppress action potential.

• Vesicles releases neurotransmitter molecules into the synaptic cleft.

• Neurotransmitter molecules bind to receptor proteins on the postsynaptic cell.

• Neurotransmitter molecules diffuse across the synaptic cleft and interact with the postsynaptic cell.

• Neurotransmitter molecules do not remain in the synaptic cleft indefinitely. It is either reabsorbed by the presynaptic cell or broken down by the enzymes in the synaptic cleft.

Which neuron receives input at the synapse?

• Presynaptic neuron

• Interneuron

• Postsynaptic neuron

• Dendritic neuron

What is the general name for the chemicals in the nervous system that allow messages to be passed across the synapse?

• Amino Acid

• Enzyme

• Hormone

• Neurotransmitter

What is the chemical used by a neuron to transmit an impulse across a synapse to another nerve cell?

• Neurotransmitters

• Synapse

• Threshold

• Impulse

• Chemical-gated ion channels causes ions to move across the cell membrane of the postsynaptic cell which produce or suppress action potential.

• Vesicles releases neurotransmitter molecules into the synaptic cleft.

• Neurotransmitter molecules bind to receptor proteins on the postsynaptic cell.

• Neurotransmitter molecules diffuse across the synaptic cleft and interact with the postsynaptic cell.

• Neurotransmitter molecules do not remain in the synaptic cleft indefinitely. It is either reabsorbed by the presynaptic cell or broken down by the enzymes in the synaptic cleft.

Tags

NGSS.HS-LS2-3

• Chemical-gated ion channels causes ions to move across the cell membrane of the postsynaptic cell which produce or suppress action potential.

• Vesicles releases neurotransmitter molecules into the synaptic cleft.

• Neurotransmitter molecules bind to receptor proteins on the postsynaptic cell.

• Neurotransmitter molecules diffuse across the synaptic cleft and interact with the postsynaptic cell.

• Neurotransmitter molecules do not remain in the synaptic cleft indefinitely. It is either reabsorbed by the presynaptic cell or broken down by the enzymes in the synaptic cleft.

If positively charged ions flow out of the postsynaptic neuron, or if negatively charged ions enter the neuron, an action potential may be suppressed.

• Presynaptic

• Postsynaptic

• Inhibition

• Excitation