Which time period is regarded as the germinal period of prenatal development?

The first two weeks of postconception

The third to the eighth week of postconception

The ninth to sixteenth week of postconception

How do teratogens affect prenatal development?

They can cause malformed facial features in newborns

They can cause depression in newborns

They can cause anoxia in newborns

They can cause malformed facial features in newborns

They can cause autism in newborns

FF01 Human Growth and Development Version 2

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Question 1

Which role does the placenta have in embryo growth and development?

Your Answer: Option(s)

Correct Answer: Option(s) D

Rationale

Providing of nutrients and oxygen.

The placenta plays a crucial role in embryo growth and development by supplying essential nutrients and oxygen from the mother to the developing fetus, while also facilitating the removal of waste products from the fetal circulation. This organ acts as a lifeline, ensuring the embryo's healthy growth and proper physiological function.

A) Digestion of nutrients
While the placenta is involved in nutrient transfer, it does not perform digestion. Digestion occurs in the mother's gastrointestinal system, where nutrients are broken down and then transported to the placenta. The placenta's function is to transfer these pre-digested nutrients to the embryo rather than digesting them itself.

B) Perception of stimuli
The placenta does not have the capability to perceive stimuli. It is primarily a vascular organ designed for nutrient and gas exchange, rather than a sensory organ. Perception of stimuli is a function of the nervous system, which is not present in the placenta.

C) Transmission of electrical signals
The placenta does not transmit electrical signals. Electrical signal transmission is typically associated with nerve cells and the nervous system. The placenta's role is mainly related to the vascular system and biochemical exchanges, not electrical communication.

D) Providing of nutrients and oxygen
The placenta is specifically designed to provide nutrients and oxygen to the developing embryo while removing waste products. This vital function supports embryonic growth and development, making it an essential component during pregnancy.

Conclusion
In summary, the placenta's primary role in embryo growth and development is to provide essential nutrients and oxygen while eliminating waste products. This organ is crucial for maintaining a healthy environment for the developing fetus, distinguishing it from other non-related functions such as digestion, perception of stimuli, and electrical signal transmission, which are not roles of the placenta.

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Providing of nutrients and oxygen.

Trophoblast is the term used for the outer cells of the human blastocyst.

The first two weeks of postconception is regarded as the germinal period of prenatal development.

They can cause malformed facial features in newborns.

Babbling is the form of intentional vocalization illustrated by a seven-month-old baby vocalizing consonant-vowel sequences.

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Providing of nutrients and oxygen.

Trophoblast is the term used for the outer cells of the human blastocyst.

The first two weeks of postconception is regarded as the germinal period of prenatal development.

They can cause malformed facial features in newborns.

Babbling is the form of intentional vocalization illustrated by a seven-month-old baby vocalizing consonant-vowel sequences.

Free Preview Ended

Unlock Full Access

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