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Unformatted text preview: Lecture 10 1. Sensory receptors: a. Propagatie an action potential via an axon of an afferent neuron b. Activate transcription in sensory cells via hormones c. when stimulated can cause opening or closing of ion channels. d. a and c. e. All of the above are true f. None of the above are true 2. A sensory unit is a: a. Receptive field of a single afferent neuron. b. Single afferent neuron with all its receptor endings. c. Local group of neurons with the same modality. d. Group of afferent neurons from a certain organ or a limb. 3. Action potentials of relatively high frequency were recorded on an axon of an mechanoreceptor. What does it infer? a. Signal was summed from several receptive fields. b. Stimulus was applied to a large portion of receptor endings, but was weak. c. Stimulus was applied to a small number of receptor endings, but was strong. d. a OR c. e. b OR c. f. a OR b Correct answers: 1. d. , 2. b., 3. e. If the stimulus is weak, but covers all the receptor endings, it might cause the 1....
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This note was uploaded on 03/26/2008 for the course CHEM 141 taught by Professor Freistad during the Spring '08 term at University of Iowa.
- Spring '08