Loss of the Netrin-1 receptor can disrupt signaling regulating which cellular outcomes?

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Prepare for the Biology Test on Energy, Enzymes, Cellular Respiration, Photosynthesis, and Metabolic Pathways with flashcards and multiple-choice questions. Gain insights with detailed hints and explanations to excel in your exam.

Multiple Choice

Loss of the Netrin-1 receptor can disrupt signaling regulating which cellular outcomes?

Explanation:
Netrin-1 receptor signaling governs cell fate by directing survival and growth decisions through dependence receptor pathways. When netrin-1 binds its receptors (such as DCC or UNC5), it promotes cell survival and can influence growth. Losing the receptor removes these survival cues, shifting outcomes toward altered growth and apoptosis. The other signaling modalities—endocrine (hormones traveling through the blood), autocrine (self-targeting signals), and juxtacrine (direct cell-to-cell contact)—describe how signals move between cells, not the downstream fate decisions controlled by netrin-1 receptor signaling. So disruption most directly affects cell growth and apoptosis.

Netrin-1 receptor signaling governs cell fate by directing survival and growth decisions through dependence receptor pathways. When netrin-1 binds its receptors (such as DCC or UNC5), it promotes cell survival and can influence growth. Losing the receptor removes these survival cues, shifting outcomes toward altered growth and apoptosis. The other signaling modalities—endocrine (hormones traveling through the blood), autocrine (self-targeting signals), and juxtacrine (direct cell-to-cell contact)—describe how signals move between cells, not the downstream fate decisions controlled by netrin-1 receptor signaling. So disruption most directly affects cell growth and apoptosis.

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