Multiple choice

Which of the following proteins are required for the growth, development, and survival of neurons?

  1. GABA

  2. Neurotrophins

  3. Neuromodulators

  4. Acetyl choline

  5. Semaphorins
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Neurotrophins are small proteins secreted in the nervous system at extremely low concentration. Low levels of a neurotrophin are needed to keep nerve cells alive. However, in some cases, presence of a neurotrophin can have the opposite effect by initiating cell death. During the development of nervous system, the levels of neurotrophins can control the unwanted nerve cells.

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