Practical 2: Lab 7 Earthworm Action Potential Exam 2024

Practical 2: Lab 7 Earthworm Action Potential Exam 2024 significance of an earthworm being an invertebrate -Answer-does not have myelinated neurons nerve conduction velocity is increased by axon diameter do earthworms have a dorsal or ventral nerve cord -Answer-ventral whereas we have a dorsal what anatomical feature enable continuous recording of electrical activity in the earthworm -Answer-electrical connections between fibers 2 lateral giant fibers -Answer-receive their input mainly from skin sensory cells on the hind end medial giant fibers -Answer-skin sensory cells of the worm front end are connected to this single functional unit -Answer-the two fibers have segmental cross-connections how to anesthetize the earthworm -Answer-10% ethanol solution for 5 min dont drown, continue to apply during experiment how to detemrine worm is anesthitized -Answer-lack of withdrawal reflex will not move when touched which side is up in earthworm setup -Answer-dorsal side up darker side up where to place electrodes -Answer-pierce the sides, avoiding the ventral cord and intestines intracellular recordings -Answer-measuring voltage and/or current across the membrane of a cell