Chapter 22

1. Which embryonic germ layer gives rise to the organs?
3. These cells may become any other type of cell, depending on input from their surroundings.
6. This section of the developing embryo gives rise to the thalamus and hypothalamus.
9. This section of the developing embryo gives rise to the pons and cerebellum.
13. These genes influence the segmentation of Drosophila.
14. This section of the developing embryo gives rise to the cerebrum.
16. These formations will later become eyes.
17. In this stage of embryonic development, a folding process creates a tube that is crucial in future development of the brain.
19. These cells form bicycle-like spokes to aid in neural migration.
20. Which embryonic germ layer gives rise to the neural tube?

2. This section of the developing embryo gives rise to the medulla.
4. In this stage of embryonic development, the cells migrate to create three distinct layers.
5. Which embryonic germ layer gives rise to the lining of the organs?
7. This section of the developing embryo gives rise to the midbrain.
8. The sharp bend in the neural tube that balloons out into the prosencephalon.
10. What determines whether cells in the dorsal ectoderm give rise to epidermal or neural cells?
11. These genes influence the segmentation of human embryos.
12. The division of an organism into repeating units, specifically on the anterior/posterior axis.
15. The transient section of the coral neural tube that gives rise to interneurons in the spine and hindbrain.
18. The transient section of the dorsal neural tube that gives rise to peripheral sensory neurons and glia.