Ectoderm Quiz

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1 Ectoderm refers only to the neural plate region of the trilaminar embryo

	true
	false

2 The central nervous system forms in the sequence:

	norochord to neural plate to neural tube
	neural tube to neural plate to neural groove
	neural plate to neural groove to neural tube
	neural plate to neural crest to neural zone

3 The neural plate is narrower at the caudal (tail) end and therefore closes earlier than the broad cranial (head) end.

	true
	false

4 The correct sequence from cranial to caudal of the secondary brain vesicles is:

	prosencephalon, mesencephalon, metencephalon, myelencephalon, rhombencephalon
	telencephalon, diencephalon, metencephalon, mesencephalon, myelencephalon
	telencephalon, diencephalon, mesencephalon, metencephalon, myelencephalon
	prosencephalon, diencephalon, mesencephalon, myelencephalon, metencephalon