Page 1of 3Practice Midterm #2 Questions TOPICS: Sensory Physiology and Muscle, Locomotion and animal energetics 1.(2 marks) Action Potentials are the signal of communication used by the sensory system to get a message to the integrating centre. There are four stimulus characteristics that action potentials can encode. Choose two of these characteristics and explain how the all-or-none AP signal is able to encode differences in stimulus. 2.(2 marks) The figure below illustrates the concept of dynamic range for a given receptor. Any of the steps of sensory transduction can set the top of the dynamic range. This figure shows that receptor saturation has limited the dynamic range of this particular system. List four other steps in sensory transduction that could set the uppermost limit for dynamic range.3.(1 mark) Given the definition of Dynamic Range in the previous question. What is range fractionation and how is it beneficial to sensory performance? 4.(2 mark) Arthropods use chemosensitive sensilla to _________, __________________, _________________ and ____________________________.