Spinal Nerves Found at the Level of L₄ to About

question 93

Multiple Choice

Spinal nerves found at the level of L₄ to about S₄ form the

• A) lumbar plexus.
• B) femoral plexus.
• C) sacral plexus.
• D) thoracic plexus.

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Definitions:

Gametes

Reproductive cells (sperm in males and eggs in females) that contain half the genetic information of the parent and can unite with another gamete to form a zygote.

Meiosis

A biological process of cell division that reduces the chromosome number by half, creating four haploid cells, each genetically distinct from the parent cell.

Epicotyl

The portion of a seedling stem above the cotyledons, which extends and develops into the first true leaves.

Embryo

An early stage of development in multicellular organisms following fertilization and before fetal stage, showing initial formation of organs and structures.