BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 51, Problem 3IQ
Why do you think the brain is affected when the testes are surgically removed (termed castration)?
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Which branch of the autonomic nervous system is responsible for penile erection? Ejaculation?
A 23-year-old man comes to the physician because of difficulty maintaining an erection. He was involved in an automobile collision that damaged his thoracic spinal cord, affecting motor and sensory function of the lower trunk and extremities. He is only able to obtain an erection through manual stimulation of his penis by his wife, and the erection does not last a long time. The best explanation for this type of erection is an intact spinal reflex arc between the pudendal nerves and which of the following?
a. Genitofemoral nerves
b. Ilioinguinal nerves
c. Lumbosacral trunks
d. Obturator nerves
e. Pelvic sympathetic nerves
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Chapter 51 Solutions
BIOLOGY
Ch. 51.1 - Prob. 1LOCh. 51.1 - Prob. 2LOCh. 51.1 - Prob. 3LOCh. 51.2 - Prob. 1LOCh. 51.2 - Prob. 2LOCh. 51.3 - Prob. 1LOCh. 51.3 - Prob. 2LOCh. 51.3 - Prob. 3LOCh. 51.4 - Prob. 1LOCh. 51.4 - Explain ovulation and the female reproductive...
Ch. 51.4 - Prob. 3LOCh. 51.5 - Prob. 1LOCh. 51.5 - Describe causes of infertility.Ch. 51 - Prob. 1DACh. 51 - Why might it be adaptive for an individual to be...Ch. 51 - Prob. 2IQCh. 51 - Why do you think the brain is affected when the...Ch. 51 - You have discovered a new organism living in tide...Ch. 51 - Prob. 2UCh. 51 - Prob. 3UCh. 51 - Which of the following structures is the site of...Ch. 51 - FSH and LH are produced by the a. ovaries. b....Ch. 51 - Prob. 6UCh. 51 - Mutations that affect proteins in the acrosome...Ch. 51 - In humans, fertilization occurs in the____, and...Ch. 51 - The testicles of male mammals are suspended in the...Ch. 51 - Prob. 1ACh. 51 - Which of the following is a major difference...Ch. 51 - Prob. 3ACh. 51 - Internal and external fertilization differ in that...Ch. 51 - Prob. 1SCh. 51 - Why do you think that amphibians and many fish...Ch. 51 - How are the functions of FSH and LH similar in...Ch. 51 - Prob. 4SCh. 51 - Why are all parthenogenic parents female?
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- Sexual arousal results in a generally positive sympathetic response, e.g. increased heart rate, increased breathing rate and depth, etc. How is it, then, that erection can occur if sympathetic activity causes vasoconstriction and prevents blood flow into the vascular spaces of the penis?arrow_forwardIn 2008, two women in New South Wales complained to police that they had suffered considerable distress and concern when they were having lower back x-rays because they had been required to completely undress and to lie in a position that meant their genitals were exposed to the radiographer. Although there was absolutely no clinical justification for this, the women, who were fully competent, had followed the instructions without protest. Does this mean that there was implied consent? Was it therefore acceptable?arrow_forwardMumps 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). Research treatment options for reduced sperm movement. Describe one option that can be used to aid successful fertilization and explain why it helps.arrow_forward
- Fertilization does not take place in a moment of passion. It occurs four to five days later. Maybe in the library, or in the shower, but not necessarily in the bedroom. Is there any truth to this statement?arrow_forwardWhy does menstruation occurs?arrow_forwardWhich of the following is NOT TRUE? A) Menopause is marked by elevated levels of gonadotropins. A spermatozoon can survive for more than five days in a female reproductive tract. C) The proliferative endometrial phase is promoted by progesterone. Synthetic estrogens act as contraceptives by preventing the ovarian luteal phase. The hormonal basis of stress-induced amenorrhea is due to the influence of the limbic system on GNRH secretion.arrow_forward
- What do you mean by blastocyst?arrow_forwardRemoval of gonads cannot be considered as a contraceptive option. Why?arrow_forwardAfter studying Chapter 14: “The Reproductive System,” from Medical terminology for health professions, Chapter 19: “The Reproductive System,” from Fundamentals of anatomy and physiology, and the corresponding presentations, answer the following questions: What hormones are produced by the pancreas? What do the terms hypothyroidism and hyperthyroidism mean? What are the hormones produced by the ovaries and testes? In your own words, what is a vasectomy? What do the terms multigravida, primigravida, and nulligravida mean?arrow_forward
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