Surprisingly, Nasal Axons Mistarget Along the A-P Axis in Ephrin-A5

question 23

Multiple Choice

Surprisingly, nasal axons mistarget along the A-P axis in ephrin-A5 knockout mice. In which cells is ephrin-A5 necessary for normal nasal axon targeting?

• A) In the posterior tectum, via forward signaling
• B) In the anterior tectum, via forward signaling
• C) In the nasal RGC axons, via reverse signaling
• D) In the nasal RGC axons, via forward signaling
• E) In the temporal RGC axons, via reverse signaling

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Definitions:

Five Senses

The traditional set of senses used for perception: sight, hearing, taste, smell, and touch.

Sensory Threshold

The minimum level of stimulus intensity needed for a stimulus to be perceived.

Stimulation

The act of arousing or urging into action, often by providing an external stimulus to trigger a response.

Sense Organs

Specialized organs or structures in the body that respond to external stimuli, such as the eyes, ears, nose, tongue, and skin, enabling perception of sight, sound, smell, taste, and touch.