Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 46, Problem 46.4CR
Summary Introduction
To explain: Anabolic steroids lead to reduced sperm counts.
Concept introduction:
Endocrine system coordinates and controls the reproduction in mammals. The hypothalamus releases gonadotropin-releasing hormone that stimulates the anterior pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). Both FSH and LH are gonadotropins, as they stimulate gonads—testes in males and ovaries in females. The secretion levels of hormones are based on the feedback regulation.
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Chapter 46 Solutions
Campbell Biology
Ch. 46.1 - Compare and contrast the outcomes of asexual and...Ch. 46.1 - Parthenogenesis is the most common form of asexual...Ch. 46.1 - WHAT IF? If a hermaphrodite self-fertilizes, will...Ch. 46.1 - Prob. 4CCCh. 46.2 - How does internal fertilization facilitate life on...Ch. 46.2 - What mechanisms have evolved in animals with (a)...Ch. 46.2 - MAKE CONNECTIONS What are the shared and distinct...Ch. 46.3 - Why might frequent use of a hot tub make it harder...Ch. 46.3 - Prob. 2CCCh. 46.3 - WHAT IF? If each vas deferens in a male was...
Ch. 46.4 - How are the functions of FSH and LH in females and...Ch. 46.4 - How does an estrous cycle differ from a menstrual...Ch. 46.4 - WHAT IF? If a human female begins taking...Ch. 46.4 - Prob. 4CCCh. 46.5 - Prob. 1CCCh. 46.5 - In what ways are tubal ligation and vasectomy...Ch. 46.5 - Prob. 3CCCh. 46 - Would a pair of haploid offspring produced by...Ch. 46 - Identify which of the following, if any, are...Ch. 46 - How does the difference in size and cellular...Ch. 46 - Prob. 46.4CRCh. 46 - Prob. 46.5CRCh. 46 - Prob. 1TYUCh. 46 - In male mammals, excretory and reproductive...Ch. 46 - Prob. 3TYUCh. 46 - Prob. 4TYUCh. 46 - Prob. 5TYUCh. 46 - Prob. 6TYUCh. 46 - Prob. 7TYUCh. 46 - Prob. 8TYUCh. 46 - DRAW IT In human spermatogenesis, mitosis of a...Ch. 46 - Prob. 10TYUCh. 46 - SCIENTIFIC INQUIRY You discover a new egg-laying...Ch. 46 - WRITE ABOUT A THEME: ENERGY AND MATTER In a short...Ch. 46 - SYNTHESIZE YOUR KNOWLEDGE A female Komodo dragon...
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- Which hormone promotes sperm production and secondary sex traits in males? A) Progesterone B) Calcitonin C) Testosterone D) Epinephrinearrow_forwardHormone replacement therapy was advertised first to women in the 1990s as a way of increasing their youthfulness. Hormone replacement therapy today is usually taking pills to increase someone's estrogen or testosterone supply. Pick either estrogen or testosterone. For either one: 1) How does your chosen sex hormone work at the cellular and at the molecular level? 2) How do these hormones improve the reproductive system as a whole? 3) What are the benefits of doing hormone replacement therapy? 4) What are the harms of doing hormone replacement therapy? 5) Who would be an ideal candidate for hormone replacement therapy?arrow_forwardMany steroids abusers become infertile because of: A) Lack of testosterone B ) High levels of hypothalamic gonadal releasing hormones D ) Low level of inhibinarrow_forward
- What is Sexual sadism disorder ?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_forwardDid the low sexual desire may be linked to excessive activity of the neurotransmitters serotonin and dopamine ?arrow_forward
- Contrast different types of sexual expression.arrow_forwardSelect the best answer or answers from the choices given: Testosterone is to the male as which hormone is to the female? (a) luteinizing hormone, (b) progesterone, (c) estrogen, (d) prolactin.arrow_forwardIn a small study, 12 men with testicular cancer and 12 without were matched on age and asked about their history of testosterone use. The results are in the table. What is the odds ratio for the association between testosterone and testicular cancer? Pair Number With Testicular Cancer Without Testicular Cancer 1 Testosterone No Testosterone 2 No Testosterone No Testosterone 3 Testosterone Testosterone 4 Testosterone Testosterone 5 Testosterone No Testosterone 6 No Testosterone No Testosterone 7 Testosterone No Testosterone 8 Testosterone No Testosterone 9 No Testosterone Testosterone 10 No Testosterone No Testosterone 11 No Testosterone No Testosterone 12 No Testosterone Testosteronearrow_forward
- Figure 43.15 Which of the following statements about hormone regulation of the female reproductive cycle is false? LH and FSH are produced in the pituitary, and estradiol and progesterone are produced in the ovaries. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. Both progesterone and estradiol are produced by the follicles. Secretion of GnRH by the hypothalamus is inhibited by low levels of estradiol but stimulated by high levels of estradiol.arrow_forwardIs it advisable for a young man to start having sex during puberty?arrow_forwardwhat is the importance of the female hormone oxytocin? how important is the hormone testosterone for male during puberty age?arrow_forward
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