Chapter 22

1. Which embryonic germ layer gives rise to the organs?
6. The transient section of the dorsal neural tube that gives rise to peripheral sensory neurons and glia.
9. This section of the developing embryo gives rise to the cerebrum.
10. This section of the developing embryo gives rise to the midbrain.
12. This section of the developing embryo gives rise to the thalamus and hypothalamus.
13. The sharp bend in the neural tube that balloons out into the prosencephalon.
16. The division of an organism into repeating units, specifically on the anterior/posterior axis.
18. The transient section of the coral neural tube that gives rise to interneurons in the spine and hindbrain.
20. These genes influence the segmentation of human embryos.

2. These formations will later become eyes.
3. Which embryonic germ layer gives rise to the neural tube?
4. In this stage of embryonic development, a folding process creates a tube that is crucial in future development of the brain.
5. These cells form bicycle-like spokes to aid in neural migration.
7. This section of the developing embryo gives rise to the medulla.
8. This section of the developing embryo gives rise to the pons and cerebellum.
11. In this stage of embryonic development, the cells migrate to create three distinct layers.
14. These genes influence the segmentation of Drosophila.
15. These cells may become any other type of cell, depending on input from their surroundings.
17. What determines whether cells in the dorsal ectoderm give rise to epidermal or neural cells?
19. Which embryonic germ layer gives rise to the lining of the organs?