What would happen to the ability to smell if a drug that inhibited adenylate cyclase were applied to the olfactory epithelium of a vertebrate? Would this drug affect the sensing of pheromones if applied to the vomeronasal epithelium? Justify your answer.

Which of the following correctly describes receptors in the skin? Select one: O a. All receptor types are spread uniformly throughout dermal tissue. Ob. Pacinian corpuscles, Ruffini endings, and Krause end bulbs detect pain. O c. One type of nerve cell detects both hot and cold. O d. Temperature receptors are free nerve endings in the dermis. Oe. Meissner corpuscles and Merkel disks detect fine touch.

Select the options that properly describe the function and features of rods. A bright blue light would stimulate rods more than cones. In low light conditions rods perceive color as gray cale. sensitive to bright light conditions. Rods are sensitive to vision in low light conditions. In low light conditions rods perceive color as blue scale. Low light conditions are viewed in blue scale. O The absorbance of rhodopsin in the rods is much more sensitive than in the cone opsins. Rods are sensitive to vision in bright light conditions. sensitive to low light conditions. Rods are sensitive to low light conditions. V The absorbance of rhodopsin in the cones is much more sensitive than in the rods opsins. Rods are sensitive to bright light conditions.

You conduct an experiment in the lab to determine the adaptation rate of different touch receptors. Based on the data shown here, what can you conclude? (the top trace for each receptor is the stimulus and the bottom trace for each receptor is the receptor response) ||||| Receptor A Receptor B ||||||||||||—–—– Receptor A is slow adapting and receptor B is slow adapting Receptor A is fast adapting and receptor B is fast adapting Receptor A is fast adapting and receptor B is slow adapting Receptor A is slow adapting and receptor B is fast adapting

A friend of yours wants to better understand how our brains can distinguish between soft and loud sounds. Which of the following best explains this to your friend? O The inner ear is equiped with different sensory cells that get "excited" for each volume of sound disturbace. O Louder sounds cause larger action potentials than do softer sounds. Louder sounds cause smaller action potentials than do softer sounds. O Louder sounds induce a lower frequency of action potentials than do softer sounds. O Louder sounds induce a higher frequency of action potentials than do softer sounds. MacBook Pro #3 $ & %24

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Use the image to answer this question: This structure changes the odorant molecule stimuli to an action potential. Olfactory cilia Olfactory tract A Mitral cells Olfactory neurons Path of inhaled air containing F odorant molecules T Ethmoid bone Filaments of olfactory nerve Connective tissue Olfactory gland C Olfactory receptor D Dendrite E Mucus

Place the following into the correct order to represent the bleaching and regeneration of rhodopsin. Opsin and cis-retinal enzymatically combine to regenerate rhodopsin Trans-retinal is enzymatically converted back to cis-retinal Cis-retinal isomerizes to trans-retinal Trans-retinal separates from opsin Opsin triggers reaction cascade that breaks down cGMP Rhodopsin absorbs photon of light www Next >

Transduction of a stimulus usually causes depolarization of a sensory receptor. a.)In most receptors, what is the chemical basis for this depolarization (that is, what is the specific mechanism for the change)?b.)How is a photoreceptor different from other receptors in terms of its membrane potential? c.) Explain how photoreceptors in the light can lead to excitation of some bipolar cells and inhibition of others

Sensory adaptation occurs when the brain filters out repetitious and/or insignificant information. Indicate the correct example of sensory adaptation. a. hog farmer does not notice the barn smell from his working boots when he wears them on the porch of the house. b. A chef discriminates the aromas from prepared dishes as he uses exotic spices. c. A sommelier can differentiate the unique tastes among various blended wines given to him to evaluate. d. A person who inadvertently burns the tip of his or her tongue with a hot drink can still consume cold beverages.