Essentials of Human Anatomy & Physiology (12th Edition)
Essentials of Human Anatomy & Physiology (12th Edition)
12th Edition
ISBN: 9780134395326
Author: Elaine N. Marieb, Suzanne M. Keller
Publisher: PEARSON
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Chapter 7, Problem 46CT
Summary Introduction

To determine:

The damaging neural effect of the toxins during early pregnancy in comparison to late pregnancy.

Introduction:

In the pregnant women, the fetal nervous system (fetus brain along with the spinal cord) is the first system, which develops during the first trimester of pregnancy.

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What is true of prenatal effects on brain plasticity?     Parents' experiences before conception can influence their children's later brain development.   Positive experiences influence prenatal brain development, whereas negative experiences do not.   Negative experiences influence prenatal brain development, whereas positive experiences do not.   Gene expression cannot be altered by prenatal experiences but can be altered after a child is born.
Why does exposure to toxins have more devastating neural effects during early pregnancy than in late pregnancy?
The brain is particularly sensitive to being shaped by input from the environment during sensitive periods of neuroplasticity. Which of the following, related to this statement, is true? A) Experience-dependent and experience-expectant plasticity during sensitive periods allow children to adapt to the environment to which they are exposed. B) Properties of sensitive period plasticity are adaptive, but also leave the brain vulnerable to harm. C) Sensitive periods are only relevant during prenatal development, and the postnatal environment shapes the brain via different mechanisms D) A & B are both correct

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Essentials of Human Anatomy & Physiology (12th Edition)

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