Why Does an Embryo Undergo the Process of Gastrulation

question 61

Multiple Choice

Why does an embryo undergo the process of gastrulation?

• A) Gastrulation separates the cells of the inner cell mass and the trophoblast so that the trophoblast is free to develop into the placenta.
• B) During gastrulation,the cells of the embryo move around to create the four extraembryonic membranes that protect the fetus.
• C) The rapid cell division that occurs during gastrulation allows the embryo to increase quickly in cell number without using much energy for cell growth.
• D) Cells in the blastocyst differentiate to form embryonic tissues but are not originally located in the right place.Gastrulation moves these cells to the proper position in the embryo.

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Definitions:

Mechanical Energy

The sum of potential and kinetic energy in a physical system, which enables it to do work.

Chemical Energy

A form of potential energy stored in chemical bonds between atoms and molecules.

Just Noticeable Difference (JND)

The smallest difference in stimulation that a person can detect 50% of the time; a measure of sensory sensitivity.

Just Noticeable Difference

The smallest difference in stimulus intensity that a specific sense can detect.