Cones terminate in which type of synaptic ending?

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Study for the NBEO Ocular Anatomy Posterior Segment and Cranial Nerves Test. Dive into flashcards and multiple-choice questions, with detailed hints and explanations. Prepare confidently for your exam today!

Multiple Choice

Cones terminate in which type of synaptic ending?

Explanation:
Cones terminate in pedicles. In the retina, photoreceptors form synapses with bipolar and horizontal cells in the outer plexiform layer. Cone terminals are large, club-shaped endings called cone pedicles, which contain multiple synaptic ribbons and create invaginating contacts with downstream neurons. This arrangement supports rapid and graded transmitter release needed for high-acuity, color vision. Rods, by contrast, end as spherules, which are smaller and have a different synaptic architecture.

Cones terminate in pedicles. In the retina, photoreceptors form synapses with bipolar and horizontal cells in the outer plexiform layer. Cone terminals are large, club-shaped endings called cone pedicles, which contain multiple synaptic ribbons and create invaginating contacts with downstream neurons. This arrangement supports rapid and graded transmitter release needed for high-acuity, color vision. Rods, by contrast, end as spherules, which are smaller and have a different synaptic architecture.

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