chapter 27 the reproductive system Flashcards
Genetic variation is NOT enhanced through __________.
separation of homologous pairs in metaphase I
crossing over events
In response to parasympathetic stimulation __________.
vessels in the penis constrict
fertilization is encouraged
blood flow increases to the penis
spermiogenesis is encouraged
The basic difference between spermatogenesis and oogenesis is that __________.
the mature ovum is haploid and the sperm is 2n
one mature ovum is produced in oogenesis, and four mature sperm are produced in spermatogenesis
the mature ovum is diploid and the sperm is 1n
two more polar bodies are produced in spermatogenesis
spermatogenesis involves mitosis and meiosis, but oogenesis involves meiosis only
The organ that makes estrogen and progesterone is the __________.
The primary sex organ of the male is the __________.
The reason why the testes are suspended in the scrotum is __________.
to reduce the chance of infection from the enteric bacteria
to provide for a cooler temperature
to protect sperm from the immune system
to place sperm storage sites nearer the penis
to create extra space for the sex organs
The sperm's acrosome __________.
provides the blood-testis barrier
beats, so that the sperm can swim
has a high density of mitochondria
The surge in LH that occurs during the middle of the ovarian cycle triggers __________.
activation of primordial follicles
The usual site of fertilization is the __________.
The uterine layer shed with each monthly cycle is the __________.
basal layer of endometrium
functional layer of endometrium
__________ cells, located between seminiferous tubules, produce testosterone.
In which uterine phase does the functional layer of the endometrium start to rebuild?
What is the most common bacterial sexually transmitted disease in the U.S.?
Which cell type is actually ovulated from the ovary?
Which is the most correct sequence of sperm flow in the male duct system?
seminiferous tubules, vas deferens, ejaculatory duct, ampulla, urethra
seminiferous tubules, prostatic urethra, vas deferens, ejaculatory duct, ampulla
seminiferous tubules, epididymis, vas deferens, ampulla, ejaculatory duct, urethra
testes, ductus deferens, urethra, seminal vesicle
testes, epididymis, ductus deferens, urethra, seminal vesicle
Which male structure is homologous to the female's clitoris?
Which represents a correct cascade of reproductive hormones in males?
FSH, GnRH, LH, testosterone
GnRH, LH/FSH, testosterone, inhibin
LH, GnRH, FSH, testosterone
FSH, LH, GnRH, testosterone
FSH, GnRH, testosterone, LH
Within the ovary, progesterone is produced by the __________.
Sperm are produced in the __________.
Ovulation in a typical, or "average," cycle usually occurs on day __________.
What hormone is responsible for the secondary sex characteristics found in women?
If the testes are both removed before puberty, will secondary sex characteristics develop in the male?
Yes, they will develop and the man can produce children.
It is impossible to tell.
No, they won't develop and the man will be sterile.
Yes, they will develop, but the man will be sterile.
The muscular wall of the uterus is called the __________.
Which of the following hormones causes the oocyte to mature?
Which of the following hormones is NOT involved in the regulation of the number of sperm produced in the testes?
Which of the following statements about myoid cells is true?
They elevate the testes.
When they contract, they cause wrinkling of the scrotal skin.
They form a straight tubule that conveys sperm into the rete testis.
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
the testicular veins
the interstitial cells
the testicular arteries
Which of the following structures passes through the inguinal canal?
the prostatic urethra
the ejaculatory duct
the spermatic cord
Which of the following structures makes up most of the male urethral length?
All EXCEPT which of the following statements about a vasectomy are true?
It is only about 10% reversible.
It is a highly effective method of birth control.
It is a minor surgical procedure.
The part of the ductus deferens that lies in the scrotum is cut.