Human Biology (MindTap Course List)

11th Edition
Cecie Starr + 1 other
Publisher: Cengage Learning
ISBN: 9781305112100



Human Biology (MindTap Course List)

11th Edition
Cecie Starr + 1 other
Publisher: Cengage Learning
ISBN: 9781305112100
Chapter 17, Problem 10SQ
Textbook Problem

Of the following, ______ cannot cross the placenta.

  1. a. alcohol
  2. b. the mother’s antibodies
  3. c. antibiotics
  4. d. toxic substances in tobacco smoke
  5. e. all can cross the placenta

Summary Introduction

Introduction: The process of physical expulsion of the fetus and placenta from the uterus is called labor or parturition. After expulsion, the fetus is known as neonate or newborn. To adjust with the life outside the uterus, a variety of cardiovascular and respiratory changes occurs in the neonate quickly after the birth.

Explanation of Solution

Reason for the correct answer:

Placenta is a vascular organ that nourishes the developing fetus in the uterus. The placenta helps to supply the fetus with oxygen and removes the waste products from the blood of the fetus. It is bound to the uterine wall and the umbilical cord that arises from the placenta. The umbilical cord is the connection between the placenta and the fetus. The placenta consists of two components namely maternal part and fetal part. Even though the mother’s blood does not mix with the fetus’ blood, the placenta lets the substances to pass to the fetus’ blood. Along with oxygen, carbon dioxide, and antibodies, many other substances like drugs and chemical agents, alcohol, nicotine, and toxic substances also pass from the mother’s blood into the fetal circulation through the placenta.

Option e. is given as “all can cross the placenta”.

The substances like alcohol, the mother’s antibodies, antibiotics, and toxic substances in tobacco smoke can cross the placenta.

Hence, the correct answer is option e.

Reasons for incorrect answers:

Option a. is given as “Alcohol”...

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Science Textbook Solutions

Find more solutions based on key concepts
Show solutions add
Platinum has a density of 21.4 g/cm3. What is the mass of 5.9 cm3 of this metal?

General Chemistry - Standalone book (MindTap Course List)

Which amino acid will be synthesized by the following process?

Introduction to General, Organic and Biochemistry

What are the strengths and weaknesses of vegetarian diets?

Understanding Nutrition (MindTap Course List)

When choosing a beverage, one should __________. a. read the label carefully, especially noting the number of s...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

Using Kirchhoffs rules, (a) find (he current in each resistor shown in Figure P28.51 and (b) find the potential...

Physics for Scientists and Engineers, Technology Update (No access codes included)

Why is the inside of Earth so hot?

Oceanography: An Invitation To Marine Science, Loose-leaf Versin