Neural Crest Cells and Motor Axons Can Only Migrate Through/over

question 18

Multiple Choice

Neural crest cells and motor axons can only migrate through/over one-half of the somite,and this migration is controlled by inhibitory and permissive interactions through factors expressed by the somite and neural crest cells/motor axons.In which half of the somite do neural crest cells/motor axons migrate through?

• A) Lateral
• B) Medial
• C) Caudal
• D) Cranial
• E) Dorsal
• F) Ventral

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Definitions:

Down's Syndrome

A genetic disorder caused by the presence of all or part of an extra 21st chromosome, characterized by physical growth delays, characteristic facial features, and mild to moderate intellectual disability.

APP Gene

A gene on chromosome 21 that encodes the amyloid precursor protein (APP), which is thought to be involved in the pathogenesis of Alzheimer's disease.

Amyloid Precursor Protein

A protein that in humans is encoded by the APP gene, and is thought to be involved in the pathological process of Alzheimer's disease.

Protein Precursor

A substance that precedes and is transformed into a protein through biological processes, often involving translation and folding.