Human Embryology Basics for Competitive Exam Prep

Human Embryology Basics

Q. At what stage does the embryo implant into the uterine wall?

Solution

The embryo implants into the uterine wall during the blastocyst stage.

Correct Answer: C — Blastocyst

Q. During which week of embryonic development does the heart begin to beat?

Solution

The heart begins to beat around the fourth week of embryonic development.

Correct Answer: B — Week 4

Q. What is the main function of the amniotic fluid?

Solution

Amniotic fluid provides cushioning and shock absorption for the developing fetus.

Correct Answer: B — Shock absorption

Q. What is the primary germ layer that develops into the nervous system?

Solution

The ectoderm is the primary germ layer that develops into the nervous system, including the brain and spinal cord.

Correct Answer: A — Ectoderm

Q. What is the role of the notochord during embryonic development?

Solution

The notochord serves as a support structure and plays a crucial role in the development of the vertebral column.

Correct Answer: A — Support structure

Q. What is the term for the process by which the three germ layers are formed?

Solution

Gastrulation is the process that forms the three germ layers: ectoderm, mesoderm, and endoderm.

Correct Answer: A — Gastrulation

Q. What structure forms from the mesoderm during embryonic development?

Solution

The mesoderm gives rise to muscles, bones, and the circulatory system.

Correct Answer: B — Muscles

Q. Which embryonic structure eventually develops into the spinal cord?

Solution

The neural tube develops into the spinal cord and brain.

Correct Answer: B — Neural tube

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