BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 51, Problem 9U
The testicles of male mammals are suspended in the scrotum because
a. the optimum temperature for sperm production is less than the normal core body temperature of the organism.
b. the optimum temperature for sperm production is higher than the normal core body temperature of the organism.
c. there is not enough room in the pelvic area for the testicles to be housed internally.
d. it is easier for the body to expel sperm during ejaculation.
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The testicles of male mammals are suspended in the scrotum because
a. the optimum temperature for sperm production is less than the normal core body temperature of the organism.
b. the optimum temperature for sperm production is higher than the normal core body temperature of the organism.
c. there is not enough room in the pelvic area for the testicles to be housed internally.
d. it is easier for the body to expel sperm during ejaculation.
Which of the following statements is NOT a role of follicle stimulating hormone (FSH) in the male reproductive system?
a. It is suppressed by increased levels of testosterone and inhibin.
b. It stimulates the Sertoli cells to produce sperm.
c. It increases the production of inhibin.
d. It stimulates a primary follicle to develop.
How can PID (pelvic inflammatory disease) lead to infertility in women?
Select one:
a. PID can lead to scar tissue developing on the Fallopian tube. This prevents the egg and the sperm from meeting, causing infertility.
b. PID prevents the endometrium from forming. There is not enough material for the fertilized egg to implant itself.
c. PID leads to scar tissue on the corpus luteum. This disrupts ovulation.
d. PID affects the cervix. This causes the cervix to swell, decreasing the chance a sperm could pass into the uterus.
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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- Which of the following statements does NOT correctly describe a difference between the male and female reproductive systems? Select one: a. Testosterone has a major role in the development of secondary sexual characteristics in male reproductive systems, whereas LH promotes the development of secondary sexual characteristics in females. b. The male reproductive system mass produces large quantities of gametes each day, whereas the female reproductive system produces an average of a single gamete each month. c. The excretory and reproductive systems both use the urethra in males, whereas in females, there are separate tubes for the excretory and reproductive systems. d. The structures that produce gametes are exterior to the body in the male reproductive system, whereas the gametes are produced inside the body for females.arrow_forwardOne of the roles of follicle-stimulating hormones(FSH) in the female reproductive system is Select one: A. To trigger the thickening of the endometrium in the luteal stage B. To promote menstruation during the follicular stage C. To promote menstruation during the luteal stage D. To trigger the thickening of the endometrium in the follicular stagearrow_forwardWhich of the following does not describe the accessory glands of the female reproductive system? TheyA. are saclike expansions of the vaginal region. B. Are muscular and ectodermal in origin.C. usually open at the apical portion of the bursa copulatrix.D. creamy white in color and opens into the genital chamber. Spermatophores are specialized packets held together by glands thatA. play a role in influencing the permeability of the testicular wall.B. are used to transport sperms into the female reproductive tract.C. regulate the release of sperm cells.D. stimulate contraction of the genital ducts. The zone of the testicular follicle where the primary spermatocytes become secondary spermatocytes and spermatids during the first and second meiosisrespectively is the zone ofA. transformation.B. maturation and reduction.C. growth.D. germarium. A hormone which has been shown in some species to have an inhibitory effect on spermatogenesis isA. ecdysone.B. peptide hormone.C. juvenile hormone.D.…arrow_forward
- The reason why the testes are suspended in the scrotum is to :A.Create extra space for the sex organs B.Reduce the chance of infection from the enteric bacteria C.Place sperm storage sites nearer the penis D.Protect sperm from the immune system E.Provide cooler temperaturearrow_forwardWhich of the following statements about the male reproductive system is false? a. The vas deferens carries sperm from the testes to the penis. b. Sperm mature in seminiferous tubules in the testes. c. Both the prostate and the bulbourethral glands produce components of the semen. d. The prostate gland is located in the testes.arrow_forwardUntreated chlamydia and gonorrhea can lead to pelvic inflammatory disease in women. Pelvic inflammatory disease (PID) can cause a buildup of scar tissue on the Fallopian tubes.Women affected with PID can become infertile because Select one: a. the ovum cannot be swept into the Fallopian tube b. the ovaries cannot secrete the necessary hormones to support an embryo c. the fertilized egg cannot implant on the endometrium d. sperm is blocked from entering the Fallopian tubes to fertilize the eggarrow_forward
- Which of the following statement correctly describe the role of androgen in the male reproductive system? Select one: A. LH stimulates the Sertoli cell to produce inhibin and to start spermatogenesis. B. Increased levels of inhibin released by the interstitial cells result in lower levels of FSH and testosterone. C. Increased levels of testosterone feedbacks negatively to the anterior pituitary and hypothalamus. D. GnRH is released by the anterior pituitary and stimulates the release of FSH and LH.arrow_forwardWhich of the following statements correctly describes the role of androgens in the male reproductive system? Select one: a. Increased levels of testosterone feedbacks negatively to the anterior pituitary and hypothalamus. b. GnRH is released by the anterior pituitary and stimulates the release of FSH and LH. c. Increased levels of inhibin released by the interstitial cells results in lower levels of FSH and testosterone. d. LH stimulates the Sertoli cells to produce inhibin and to start spermatogenesis.arrow_forwardIdentify the structure that secretes the hormone involved in the development of the secondary male sex characteristics and contributes to spermatogenesis. Select one: a. D, which is the Sertoli cell b. A, which is the spermatocyte c. C, which is the sperm cell d. B, which is the interstitial cellarrow_forward
- Which of the following statement does NOT describe the event that occurs if the ovum is not fertilized? Select one: A. Progesterone maintains the endometrium for the zygote. B. Low level of progesterone results in menstruation. C. The corpus luteum degenerates and stops producing estrogen and progesterone. D. GnRH, FSH, and LH levels begin to increase.arrow_forwardWhich of the following statements describes what occurs if the ovum is fertilized? Select one: a. GnRH, FSH, and LH levels begin to increase. b. The corpus luteum degenerates and stops producing estrogen and progesterone. c. Progesterone maintains the endometrium for the zygote. d. Low levels of progesterone result in menstruation.arrow_forwardHow do tubal ligations and vasectomies prevent further pregnancies? Select one: a. The corpus luteum and the epididymis are suppressed using a chemical swab. The fertilized egg could no longer implant in the endometrium. b. The Fallopian tubes and vas deferens are cut and tied off, thereby preventing the movement of the eggs and sperm. c. The Fallopian tubes and the vas deferens are cut. Eggs and sperm can no longer be produced. d. The Fallopian tube and vas deferens are cut and tied off, thereby reducing needed reproductive hormone levels.arrow_forward
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