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Unformatted text preview: Which of the following associations regarding the nervous system is incorrect? A. oligodendrocyte - CNS B. presynaptic membrane - dendrite C. summation - axon hillock D. saltatory conduction - node of Ranvier E. acetylcholinesterase - synapse Figure 49.19 N 2 N 1 N 2 N 1 (a) Synapses are strengthened or weakened in response to activity. (b) If two synapses are often active at the same time, the strength of the postsynaptic response may increase at both synapses. Figure 50.3 (a) Receptor is afferent neuron. (b) Receptor regulates afferent neuron. To CNS Afferent neuron Afferent neuron To CNS Receptor protein Sensory receptor Stimulus Neurotransmitter Sensory receptor cell Stimulus Stimulus leads to neuro- transmitter release. Figure 50.4 (a) Single sensory receptor activated Gentle pressure Sensory receptor More pressure Low frequency of action potentials per receptor High frequency of action potentials per receptor (b) Multiple receptors activated Sensory receptor Gentle pressure More pressure Fewer receptors activated More receptors activated Figure 50.7 (a) Rattlesnake (b) Beluga whales Eye Infrared receptor Figure 50.10 Outer ear Middle ear Inner ear Skull bone Malleus Incus...
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This note was uploaded on 04/05/2012 for the course BILD 2 taught by Professor Schroeder during the Winter '08 term at UCSD.
- Winter '08