Multiple choice

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

  1. GABA

  2. Neurotrophins

  3. Neuromodulators

  4. Acetylcholine

  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 level of neurotrophins can control the unwanted nerve cells.

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