8Sample and/or review questions – sensory physiologyVery short answer questions1.Stimulus strength is coded as the _________________________________________ of action potentials in the afferent sensory neuron. 2.The figure at right illustrates the response of 40 ommatidia in the compound eye of the horseshoe crab. Half of these ommatidia are exposed to light, while the remaining half are kept in the dark. What is the principle illustrated by this response? _________________________________________ Explain why the response of ommatidia 19-20 is so much greater than that of ommatidia 22-23. 3.The presence of numerous taste buds scattered over the smooth, scaleless skin of the catfish has resulted in this useful experimental model being dubbed the ___________________________________________. 4.True or false (choose one): The taste cells of the vertebrate taste bud constitute primary sensory cells because they are derived from epithelial cells. 5.The _______________________________________________ is an accessory olfactory structure that is found in many vertebrates and that appears to play a key role in intraspecific chemical communication (i.e. pheromone detection).