Which of the choices below is not a part of the hypothalamic-pituitary-gonadal axis?
thalamus
All of the following things occur during meiosis I with the exception of one thing. Select the statement below that does not occur during meiosis I.
The sister chromatids are separated from each other.
The ability of sperm cells to move along the ductus deferens is due to ________.
peristaltic contractions
Which of the choices below is not a function of testosterone?
stimulates mammary gland development
The adenohypophyseal hormone that triggers ovulation is estrogen.
FALSE
All of the following statements referring to the uterine cycle are true except ________.
FSH and LH directly promote development of the uterine endometrium
Spermatogenesis ________.
involves a kind of cell division limited to the gametes
Select the statement which is true regarding independent assortment.
It is a significant source of genetic variation only during meiosis I.
Which of the following statements about spermatogenesis is not true?
Each spermatid forms two sperm.
A human egg or sperm contains 23 pairs of chromosomes.
FALSE
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 unable to produce viable sperm
When a couple is having difficulty conceiving a child, it is necessary to investigate the sperm of the male.
TRUE
Which of the following statements about the female reproductive process is not true?
Rebuilding the endometrium is under the control of prolactin.
Which of the choices below is not a function of the vagina?
serves as a passageway for the primary oocyte
The amount of testosterone and sperm produced by the testes is dependent on the influence of FSH alone.
FALSE
Select the correct statement about testosterone control.
GnRH from the hypothalamus causes FSH and LH release from the anterior pituitary.
A low secretion of luteinizing hormone (LH) in the normal male adult would cause ________.
decreased testosterone secretion
Which of the following glands are responsible for 70% of the synthesis of semen?
the seminal vesicles
The duct system of the male reproductive system includes all but which of the following?
corpus spongiosum
The structures that receive the ovulated oocyte, providing a site for fertilization, are called the ________.
fallopian tubes
Genetic variation is NOT enhanced through __________.
mitosis
In response to parasympathetic stimulation __________.
blood flow increases to the penis
The basic difference between spermatogenesis and oogenesis is that __________.
one mature ovum is produced in oogenesis, and four mature sperm are produced in spermatogenesis
The organ that makes estrogen and progesterone is the __________.
ovary
The primary sex organ of the male is the __________.
testes
The reason why the testes are suspended in the scrotum is __________.
to provide for a cooler temperature
The sperm's acrosome __________.
contains enzymes
The surge in LH that occurs during the middle of the ovarian cycle triggers __________.
ovulation
The usual site of fertilization is the __________.
uterine tube
The uterine layer shed with each monthly cycle is the __________.
functional layer of endometrium
__________ cells, located between seminiferous tubules, produce testosterone.
Interstitial
In which uterine phase does the functional layer of the endometrium start to rebuild?
proliferative
What is the most common bacterial sexually transmitted disease in the U.S.?
chlamydia
Which cell type is actually ovulated from the ovary?
secondary oocyte
Which is the most correct sequence of sperm flow in the male duct system?
seminiferous tubules, epididymis, vas deferens, ampulla, ejaculatory duct, urethra
Which male structure is homologous to the female's clitoris?
penis
Which represents a correct cascade of reproductive hormones in males?
GnRH, LH/FSH, testosterone, inhibin
Within the ovary, progesterone is produced by the __________.
corpus luteum
Sperm are produced in the __________.
seminiferous tubules
Ovulation in a typical, or "average," cycle usually occurs on day __________.
14
What hormone is responsible for the secondary sex characteristics found in women?
estrogen
If the testes are both removed before puberty, will secondary sex characteristics develop in the male?
No, they won't develop and the man will be sterile.
The muscular wall of the uterus is called the __________.
myometrium
Which of the following hormones causes the oocyte to mature?
FSH
Which of the following hormones is NOT involved in the regulation of the number of sperm produced in the testes?
PSA
Which of the following statements about myoid cells is true?
They surround the seminiferous tubules and contract rhythmically to squeeze sperm and testicular fluid through the tubules out of the testes.
Which of the following absorb heat from the testes?
the pampiniform plexus
Which of the following structures passes through the inguinal canal?
the spermatic cord
Which of the following structures makes up most of the male urethral length?
spongy urethra
All EXCEPT which of the following statements about a vasectomy are true?
It is only about 10% reversible.