Chapter 27

Table of Content
The most important risk for testicular cancer in young males is ________.
failure of the testis to make their normal decent
The dartos and cremaster muscles are important to the integrity of the male reproductive system. Which of the following is true about the role they play?
They regulate the temperature of the testes.
How do the testes respond to exposure to excessive body warmth?
They move away from the pelvic cavity.
The cells that produce testosterone in the testis are called ________.
interstitial endocrine cells
Which of the following occurs as a result of undescended testes?
Inadequate or nonviable sperm will be produced.
The ability of sperm cells to move along the ductus deferens is due to ________.
peristaltic contractions
The duct system of the male reproductive system does not include the ________.
corpus spongiosum
Which of the following glands are responsible for about 70% of the volume of semen?
the seminal glands
Erection of the penis results from ________.
a parasympathetic reflex
Select the correct statement about male sexual response.
Erection is the result of vascular spaces in the erectile tissues filling with blood.
Why doesn’t semen enter the urinary bladder during ejaculation?
The smooth muscle sphincter at the base of the urinary bladder closes.
If gametes were diploid like somatic cells, how many chromosomes would the zygote contain?
twice the diploid number, and with every succeeding generation, the chromosome number would continue to double and normal development could not occur
Human egg and sperm are similar in that ________.
they have the same number of chromosomes
Which of the choices below is not a function of testosterone?
stimulates mammary gland development
Which male hormone inhibits the secretion of FSH?
Which of the choices below is not a part of the hypothalamic-pituitary-gonadal axis?
Select the correct statement about testosterone control.
GnRH from the hypothalamus causes FSH and LH release from the anterior pituitary.
A boy who has not passed through puberty sustains an injury to his anterior pituitary such that FSH is no longer released, but LH is normal. After he grows to maturity, one would expect that he would ________.
be sterile
A low secretion of luteinizing hormone (LH) in the normal male adult would cause ________.
decreased testosterone secretion
Which of the following hormones stimulates the release of anterior pituitary gonadotropins?
All but one of the following statements is true of uterine function. Select the statement that is not true of uterine function.
The narrow portion of the uterus near the cervix is the most typical site of fertilization.
The structures that receive the ovulated oocyte, providing a site for fertilization, are called the ________.
uterine tubes
Fertilization generally occurs in the ________.
uterine tubes
Which of the choices below is not a function of the vagina?
serves as a passageway for the primary oocyte
Which of the following is a correct statement about uterine tubes?
The infundibulum is the funnel-shaped region near the ovary.
Which of the following female structures is homologous to the male scrotum?
labia majora
Which of the following statements is true concerning the mammary glands of both males and females?
The mammary glands are modified sweat glands that are actually part of the integumentary system.
The basic difference between spermatogenesis and oogenesis is that ________.
in oogenesis, one mature ovum is produced, and in spermatogenesis four mature sperm are produced from the parent cell
Occasionally three polar bodies are found clinging to the mature ovum. One came from an unequal division of the ovum, but from where did the other two arise?
The first polar body has also divided to produce two polar bodies.
In humans, separation of the cells at the two-cell state following fertilization may lead to the production of twins, which in this case would be ________.
genetically identical
The oral contraceptive pill, informally called “the pill” contains an estrogen and progesterone or a synthetic mimic of this hormone. The combination of these two hormones taken in the pill and circulating in the blood work because.
The hormones cause the woman’s body to mimic the activities of a pregnancy and disrupt the ovarian cycle, preventing ovulation.
Effects of estrogen include ________.
growth of the breasts at puberty
Which of the choices below is not a function of testosterone?
stimulates mammary gland development
During the secretory phase of the menstrual cycle ________.
progesterone levels are at their highest
Select the correct statement about the uterine cycle.
If fertilization occurs, the corpus luteum is maintained by a hormone secreted by the developing embryo.
Normally menstruation occurs when ________.
blood levels of estrogen and progesterone decrease
Which of the following will occur immediately after ovulation?
The endometrium enters its secretory phase.
Which of the following statements about the female reproductive process is not true?
Rebuilding the endometrium is under the control of prolactin.
All of the following statements referring to the uterine cycle are true except ________.
FSH and LH directly promote development of the uterine endometrium
Which of the following phases or processes in the monthly reproductive cycle of the female occur simultaneously?
regression of the corpus luteum and a decrease in ovarian progesterone secretion

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