Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Textbook Question
Chapter 42, Problem 1CT
The rubella virus causes German measles. If a pregnant woman is is infected by the rubella virus during the first trimester of her pregnancy, her child may be born deaf or blind. Infections later in pregnancy do not increase the risk of these effects. Explain why.
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Is congenital rubella syndrome more likely to occur if a pregnant woman is infected early or late in the pregnancy?
Mumps is a viral infection. The primary symptom of mumps is visible swelling of the parotid gland on either side of the face. However, the virus can also infiltrate the male reproductive system, causing the testes to atrophy. Some effects include oligospermia (low sperm count), azoospermia (no sperm in semen), and asthenospermia (reduced sperm movement).
Explain why each of the following effects of this virus reduces the efficacy of the male reproductive system to fertilize an ovum.
No sperm in semen
Low sperm count
Reduced sperm movement
Effect
How it reduces the efficacy of the male reproductive system to fertilize an ovum
No sperm in semen
2. Low sperm count
3. Reduced sperm movement
Mumps is a viral infection. The primary symptom of mumps is visible swelling of the parotid gland on either side of the face. However, the virus can also infiltrate the male reproductive system, causing the testes to atrophy. Some effects include oligospermia (low sperm count), azoospermia (no sperm in semen), and asthenospermia (reduced sperm movement).
Explain why each of the following effects of this virus reduces the efficacy of the male reproductive system to fertilize an ovum.
No sperm in semen
Low sperm count
Reduced sperm movement
Chapter 42 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 42 - Prob. 1DAACh. 42 - Prob. 2DAACh. 42 - Prob. 3DAACh. 42 - Prob. 4DAACh. 42 - The end product of cleavage is a __________. a....Ch. 42 - The outermost germ layer in a vertebrate gastrula...Ch. 42 - Prob. 3SQCh. 42 - Prob. 4SQCh. 42 - In humans, fertilization typically occurs in the...Ch. 42 - The ________, a fluid-filled sac, surrounds and...
Ch. 42 - The placenta consists of __________. a. embryonic...Ch. 42 - During the fetal period, ____________. a....Ch. 42 - Prob. 9SQCh. 42 - Match each hormone with its action(s). ______...Ch. 42 - Prob. 11SQCh. 42 - Prob. 12SQCh. 42 - Prob. 13SQCh. 42 - Prob. 14SQCh. 42 - Place these events in human development in the...Ch. 42 - The rubella virus causes German measles. If a...Ch. 42 - A nursing mother who has an alcoholic drink...Ch. 42 - To determine the effect of the bicoid gene,...Ch. 42 - If an embryo splits at the two-cell stage, each of...
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