end show 35-2 the nervous system slide 1 of 38 copyright pearson prentice hall the synapse synapse
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End Show 35-2 The Nervous System Slide 3 of 38 Copyright Pearson Prentice Hall The Synapse As an impulse reaches a terminal, vesicles send neurotransmitters into the synaptic cleft. These diffuse across the cleft and attach to membrane receptors on the next cell. Receptor Ca +TRANSCRIPT
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35-2 The Nervous System
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The Synapse
Synapse
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35-2 The Nervous System
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The Synapse
The synaptic cleft separates the axon terminal from the dendrites of the adjacent cell.
Synaptic cleft
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35-2 The Nervous System
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The Synapse
As an impulse reaches a terminal, vesicles send neurotransmitters into the synaptic cleft.
These diffuse across the cleft and attach to membrane receptors on the next cell.
Receptor CaCa++
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The Synapse
Sodium ions then rush across the membrane, stimulating the next cell.
If the stimulation exceeds the cell’s threshold, a new impulse begins.
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Let’s try it!!!
Dendrites – whisper in ear of cell body
Cell body – Raise arms to start action potential
Axon – Carry action potential by raising arms
it’s the ACTION Potential WAVE!!
Pre-Synapse Terminal – make neurotransmitter and toss to next dendrite!
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The Divisions of the Nervous System
Central NSCentral NS
Peripheral NSPeripheral NS
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The Spinal Cord
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The Brain
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Cerebrum – Thinking and Analyzing
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Blood pressure, heart rate, breathing, and swallowing are controlled in the brain stem.
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The Brain
Thalamus
Hypothalamus
The thalamus receives messages from all sensory receptors throughout the body and relays the information to the proper region of the cerebrum for further processing.The hypothalamus
controls recognition and analysis of hunger, thirst, fatigue, anger, and body temperature. It controls coordination of the nervous and endocrine systems.
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35-2 The Nervous System
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