HUMAN ANATOMY PKG >CUSTOM<
8th Edition
ISBN: 9781323572528
Author: Marieb
Publisher: Pearson Custom Publishing
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Chapter 25, Problem 24RQ
Summary Introduction
To review:
The explanation behind the shrinking of scrotum due to the cold environment.
Introduction:
Scrotum is a pouch of skin that encloses the testicles and it is located externally behind the penis. It is a small muscular sac that includes testicles, blood vessels and a part of the spermatic cord and also protect them. The testes are oval-shaped male reproductive organs that are responsible for storing and producing sperm (male gamete). The sperm are haploid in nature, while the whole body is diploid in nature.
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Students have asked these similar questions
A man swam in a cold lake for an hour and then noticed that his scrotum was shrunken and wrinkled. His first thought was that he had lost his testicles. What had really happened?
A 20-year old man went swimming in a very cold lake for about an hour and when he got out
noticed his scrotum had shrunk and appeared wrinkled:
Select the TRUE statement/s:
OA) The scrotum shrunk to increase heat loss from the scrotum
O. B) The scrotum appeared wrinkled to pull scrotum away from the body to prevent heat loss
OC) The scrotum shrunk to pull the testes closer to the body to increase the temperature in the testes
OD) Both A and B
OE) Both B and C
(a) Which men would have a higher testicular temperature, those who wear briefs or those who wear boxer shorts? (b) Which would be more likely to cause sterility? Explain.
Chapter 25 Solutions
HUMAN ANATOMY PKG >CUSTOM<
Ch. 25 - Where are interstitial cells located? What is...Ch. 25 - Distinguish the tunica albuginea from the tunica...Ch. 25 - What is meant by the phrase "sperm mature in the...Ch. 25 - Where is the ejaculatory duct located?Ch. 25 - Which pair of accessory glands produces the...Ch. 25 - Which erectile tissue does the urethra pass...Ch. 25 - How many spermatids are formed from each primary...Ch. 25 - What roles do sustentocytes play in sperm...Ch. 25 - What are the components of the head of the sperm?...Ch. 25 - What type of tissue lines the uterine tubes? How...
Ch. 25 - Name the peritoneal supports of the female...Ch. 25 - Describe the location of each of the following...Ch. 25 - Which hormone stimulates follicle development in...Ch. 25 - During which period of a female’s life do stem...Ch. 25 - What is the corpus luteum, and what role does it...Ch. 25 - What are the male homologues of the following...Ch. 25 - When does the glandular portion of the breast...Ch. 25 - What prevents more than one sperm from fertilizing...Ch. 25 - What part of the placenta is formed from maternal...Ch. 25 - In addition to nourishing the developing fetus,...Ch. 25 - What type of screening is most common for each...Ch. 25 - What do the embryonic mesonephric ducts form in a...Ch. 25 - What are secondary sex characteristics in males...Ch. 25 - Which of the following statements about the female...Ch. 25 - For each of the following hollow organs; choose...Ch. 25 - Which of the following structures produces the...Ch. 25 - The uterine cycle can be divided into three...Ch. 25 - Prob. 5RQCh. 25 - The hormone-secreting layer of the placental...Ch. 25 - The function of the stereocilia in the duct of the...Ch. 25 - The broad ligament of the uterus in the female...Ch. 25 - The embryonic paramesonephric duct gives rise to...Ch. 25 - Which of the following statements about the...Ch. 25 - If the uterine tube is a trumpet ("salpinx"), what...Ch. 25 - The myometrium is the muscular layer of the...Ch. 25 - What occurs during the proliferative phase of the...Ch. 25 - Which cells in the ovaries secrete hormones? (a)...Ch. 25 - Prob. 15RQCh. 25 - The hormones that stimulate the ovarian cycle are...Ch. 25 - Sustentocytes (a) nourish spermatocytes and....Ch. 25 - Match the embryonic structures listed in column B...Ch. 25 - Describe the major structural and functional...Ch. 25 - Prob. 20RQCh. 25 - Prob. 21RQCh. 25 - (a) Outline the structural changes that a maturing...Ch. 25 - Prob. 23RQCh. 25 - Prob. 24RQCh. 25 - Prob. 25RQCh. 25 - Prob. 26RQCh. 25 - Prob. 27RQCh. 25 - Prob. 28RQCh. 25 - Prob. 29RQCh. 25 - Why would a radical mastectomy affect ability to...Ch. 25 - Based on what you know about the sources of semen,...Ch. 25 - A 68-year-old man who has trouble urinating is...Ch. 25 - Gina gave birth to six children. During an...Ch. 25 - Why do doctors often recommend that men not wear...Ch. 25 - Explain how a woman with an ovary removed from one...Ch. 25 - In severe cases of endometriosis, endometrial...Ch. 25 - Name three sets of arteries that must be...
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- What could be the reason why a woman only gets her period after puberty begins? A) Before puberty, high quantities of of corpus luteum are present B) Before puberty, GnRH levels may be too low. C) Before puberty, their endometrial lining is too thick.arrow_forwardWhy is it some important for testicles to be outside the abdominal cavity and in the scrotum?arrow_forwardWhich will most likely occur if the testes do not descend into the scrotum before puberty? O A) The androgens will not be produced ○ B) Sperm will be produced but will not move into the male reproductive ducts OD) Sperm production in the seminiferous tubule cannot occur D) The blood-testis barrier will not be formed OE). All of the abovearrow_forward
- Follicle cells left behind after ovulation A)are shed during menstruation. B)become the corpus luteum, which secretes steroid hormones. C)become the placenta, which secretes human chorionic gonadotropin. D)become the corpus luteum, which secretes luteinizing hormone.arrow_forwardWhy the temperature of scrotum is lower than that of the body?arrow_forwardFailure of testes to descend into scrotal sacs leads to sterility. Why?arrow_forward
- Erection of the penis results from a) dilation of the arteries in the penis c) a parasympathetic activation of the prostatic gland d) vasoconstriction of the arteries in the penis e) a sympathetic reflexarrow_forwardWhy does the patient have light menstrual periods that have now stopped? Choose all the INCORRECT answer(s) from the options below a) There would be no development of follicles during the follicular phase of the ovarian cycle b) The endometrial lining will continue to increase in thickness c) The cells that produce FSH and LH are located in the hypothalamus and not in the pituitary gland. d) The levels of oestrogen would be higher than normal during the follicular phase of the ovarian cycle. e) The tumor would only affect the cells the produce the hormone that stimulates milk secretion.arrow_forwardA 16-year-old male patient arrives in the emergency department after a soccer injury where he was hit in the right groin by a soccer ball at high speed. Later that afternoon, the patient noticed that the right side of his scrotum was swollen and painful; he is otherwise healthy. The physician notes that the right testicle is still palpable and seems to be surrounded by a clear fluid. What is the clear fluid, and what is its source?arrow_forward
- The left testis of a newborn baby failed to descend into his scrotal sac.For some reason, the condition was not treated, and the testis remainedin that position until after puberty. Select the observation consistentwith the fate of the left testis after puberty.(1) normal testosterone secretion(2) no interstitial cells in the testis(3) no sustentacular cells in the testis(4) no spermatogonia in the testis(5) increased number of interstitial cells(6) normal LH secretiona. 1 b. 1,2,3,4 c. 1,2,3,6 d. 1,4,6 e. 4,6arrow_forwardWhat is the male homologue to the female greater vestibular glands a. Seminal glands b. Prostate gland c. Bulbourethral glands d. Ejaculationarrow_forwardIn men, LH (luteinizing hormone) stimulates ... a) ... spermatogenesis. b) ... the development of the sperm ducts. c) ... the production of testosterone.arrow_forward
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