Cones terminate in which type of synaptic ending?

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Study for the NBEO Ocular Anatomy Posterior Segment and Cranial Nerves Test. Prepare using flashcards and multiple choice questions. Get ready for your exam with hints and explanations for each question!

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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