A specific pattern of activation is observed in the right hemisphere piriform cortex in response to a specific smell. Which of the following choices must be true? Group of answer choices a - The pattern of activation across the glomeruli in the left olfactory bulb mirrors the pattern of activation observed in the right hemisphere piriform cortex. b - The activity in the right hemisphere piriform cortex was independent of the number of odorant molecules that entered the olfactory epithelium. c - The odorant molecules that made up the smell were of different shapes and therefore activated different receptors in the right nostril, creating a unique pattern that is conserved first across the olfactory bulb, then along the olfactory tract, then within the thalamus, and then finally in the right hemisphere piriform cortex. d - The activity in the right hemisphere piriform was initiated by the binding of odorant molecules to G-protein coupled receptors in the right nostril.
Anatomy and Physiology of Special Sensory Organs
Sensory organs can be labeled as special sensory structures that permit sight, hearing, odor, and flavor. Sensory structures permitting proprioception, touch, thermal, and pain perception can be classified as more advanced sensory organs. The sensory neurons are trained to find out modifications in the external and internal conditions so that a person's body can react to that change. A stimulus is the first signal that is recognized by any sensory receptor of the body. Stimulus is an impulse generated when there is a change in the surroundings of a person. For example, a heated environment will alert the brain through the thermal sensory organs and generate a reflex accordingly.
Sensory Receptors
The human sensory system is one of the most complex and highly evolved structures, which processes a myriad of incoming messages. This well-coordinated system helps an organism or individual to respond to external stimuli, appropriately. The sensory receptors are an important part of the sensory system. These receptors are specialized epidermal cells that respond to external environmental stimuli. These receptors consist of structural and support cells that form the peripheral unit of the receptor and the neural dendrites which receive and detect the external stimuli.
A specific pattern of activation is observed in the right hemisphere piriform cortex in response to a specific smell. Which of the following choices must be true?
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