Intro to Neuroscience - Exam 2 VERIFIED With questions and answers fully Quoted,Detailed 20205,2026

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Intro to Neuroscience - Exam 2 Terms in this set (473) True or False: Receptor cells are like filters, converting key stimuli into electrical signals True What is the end product of sens... ory receptors? Action potentials A physical event that triggers a sensory response Stimulus The concept that each nerve input to the brain reports only a particular type of information Labeled lines A local change in the resting potential of a receptor cell in response to stimuli, which may initiate an action potential Generator potential What other type of signal does a generator potential resemble? EPSPs Intro to Neuroscience - Exam 2 11/3/21, 4:53 PM Intro to Neuroscience - Exam 2 Flashcards | Quizlet https://quizlet.com/234126367/intro-to-neuroscience-exam-2-flash-cards/ 2/22 The process in which a receptor cell converts the energy in a stimulus into a change in the electrical potential across its membrane Sensory transduction A skin receptor cell type that detects vibration & pressure Pacinian (lamellated) corpuscle Where in the skin are pacinian corpuscles located? The innermost layer What is the absolute threshold of pacinian corpuscle detection? 200+ cycles per second How are sensory nerve ending generator potentials created? The stretching of nerve ending membranes, causing mechanically gated Na+ channels to pop open True or False: The strength of a stimulus is proportional to the amplitude of the generator potential True True or False: Sensory systems often shift away from accurate portrayal True The stimulus intensity adequate to trigger an action potential in a sensory cell Threshold Intro to Neuroscience - Exam 2 11/3/21, 4:53 PM Intro to Neuroscience - Exam 2 Flashcards | Quizlet https://quizlet.com/234126367/intro-to-neuroscience-exam-2-flash-cards/ 3/22 Which sensory receptor responds to change in stimuli? Meissner's corpuscles Meissner's (tactile) corpuscles and Merkel's discs both mediate our ability to perceive what? The forms of objects we touch A skin receptor cell type that detects light touch, responding especially to edges and isolated points on a surface Merkel's discs A skin receptor cell type that detects stretching of the skin Ruffini corpuscles An axon that terminates in the skin and has no specialized cell associated with it; detects pain/temperature changes Free nerve endings True or False: As the strength of a stimulus increases, additional sensory neurons sensitive to higher intensities are "recruited" True The stimulus region and features that affect the activity of a cell in a sensory system Receptive field The progressive loss of receptor response as stimulation is maintained Sensory adaptation Intro to Neuroscience - Exam 2 11/3/21, 4:53 PM Intro to Neuroscience - Exam 2 Flashcards | Quizlet https://quizlet.com/234126367/intro-to-neuroscience-exam-2-flash-cards/ 4/22 A receptor in which the frequency of action potentials drops rapidly as stimulation is maintained Phasic receptors A receptor in which the frequency of action potential declines slowly or not at all as stimulation is maintained Tonic receptors The process in which higher brain centers, such as the cortex and thalamus, suppress some sources of sensory information and amplify others The Central Modulation of Sensory Information A somatosensory system that delivers most touch stimuli via the dorsal columns of spinal white matter to the brain Dorsal column system A strip of skin innervated by a particular spinal nerve Dermatome A neuron upon which information from more than one sensory system converges Polymodal neuron A condition in which stimuli in one modality evoke the involuntary experience of an additional sensation in another modality [Show More]

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