PBSI 332 Exam 2 Questions and answers, Graded A+[LATEST EXAM UPDATES]

PBSI 332 Exam 2 Questions and answers, Graded A+ What is a Aplysia Californica? - A Sea Slug Why do we study Aplysia? - - They have a small nervous system - Their neurons are large - There is little variation between animals (so they can label neurons) - We can fully understand learning and memory What is habituation? - - Response to a stimulus decreases with repeated exposure - "You get use to it" - Think habit as root word, repeated bc you get use to it What is sensitization? - - Response to a stimulus increase with repeated exposure or with exposure to a different stimulus - "It gets more annoying/painful overtime" - Think sense as root word, you can sense it coming How do we measure habituation and sensitization in Aplysia? - Gill withdrawal reflex True or false: Spaced training produces no significant difference in the duration of memory - False, spaced training enhances memory and increases duration Why would a creature need to habituate or sensitize to its environment? - - Precautionary Principle: nervous systems assume danger first rather than be caught unaware - there is a cost to being cautious; response lessens overtime if animal deems a stimuli isn't dangerous (or increases if the stimuli is dangerous) What is the significance of Aplyisa's abdominal ganglion? - - Nervous system is across the entire creature - not just he head - We can pinpoint the exact neurons the cause the gill reflex and study t