Embryology: practice question

A Anatomy question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

Try it

Anatomy · Embryology

Sample item

Which germ layer gives rise to the epidermis and nervous system?

ATrophoblastBEndodermCMesodermDEctoderm

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

D. Ectoderm

Ectoderm forms the epidermis and nervous system, while mesoderm forms muscle and connective tissue and endoderm lines many internal organs.

Option by option

A. Trophoblast
Trophoblast contributes to placenta rather than primary germ layers.
B. Endoderm
Endoderm forms epithelial linings of gut and respiratory tract.
C. Mesoderm
Mesoderm forms musculoskeletal and vascular tissues.
D. Ectoderm (correct)
Correct: ectoderm produces skin surface and neural tissue.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

Questions about this Anatomy question

What is the answer to this Anatomy question?

The best answer is D, Ectoderm. Ectoderm forms the epidermis and nervous system, while mesoderm forms muscle and connective tissue and endoderm lines many internal organs.

Why is "Trophoblast" not the answer?

Trophoblast contributes to placenta rather than primary germ layers.

Why is "Endoderm" not the answer?

Endoderm forms epithelial linings of gut and respiratory tract.

Why is "Mesoderm" not the answer?

Mesoderm forms musculoskeletal and vascular tissues.

What concept does this question test?

It tests Embryology in Anatomy. The correct option holds because: Correct: ectoderm produces skin surface and neural tissue.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Embryology?

Learn every nerve by its route, its muscles and what a lesion looks like at the bedside. That one habit answers a large share of questions. Then use the flashcards and the other Anatomy questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.