When the Gill-Withdrawal Reflex of the Sea Snail Aplysia Has

question 123

Multiple Choice

When the gill-withdrawal reflex of the sea snail Aplysia has been successfully conditioned to a stimulus such as a squirt of water from a WaterPik, observed changes in the neural circuit include:

• A) an increase in the number of synapses.
• B) a decrease in the number of synapses.
• C) a decrease in the branching of neurons and in the amount of neurotransmitters released.
• D) functional but not structural changes in the brain.

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Definitions:

Calcium Ions

Essential ions within the body that play pivotal roles in bone health, muscle contraction, nerve function, and blood clotting.

G Actin

Globular protein molecules that, when bound together, form fibrous actin (F actin).

Aquatic Mammals

Mammals that are primarily adapted to living in water, including species such as whales, dolphins, and seals.

Slow Fibers

Muscle fibers characterized by their slow contraction time and enhanced ability to sustain long-term activities.