reproductive chapter 27

Select the correct statement about the hormonal events of the ovarian cycle.

High estrogen levels result in a surge of LH release.

Which hormone is absolutely necessary for ovulation to occur?

LH

Which of the following will occur after ovulation?

The endometrium enters its secretory phase.

The corpus luteum secretes progesterone only.

false

The cells that produce testosterone in the testis are called

interstitial endocrine cells

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.

Which of the following hormones stimulates the release of anterior pituitary gonadotropins?

GnRH

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

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

Which male hormone inhibits the secretion of FSH?

inhibin

Spermatogenesis

involves a kind of cell division limited to the gametes

Which of the following female structures is homologous to the male scrotum?

labia majora

A 38-year-old male is upset about his low sperm count and visits a "practitioner" who commonly advertises his miracle cures of sterility. The practitioner is a quack who treats conditions of low sperm count with megadoses of testosterone. The patient experiences a huge surge in libido. Would this treatment result in a higher or lower sperm count, and why?

lower sperm count. high levels of testosterone inhibit the release of GnRH, inhibiting FSH release, resulting in direct inhibition of speratogenesis

Which of the choices below is not a part of the hypothalamic-pituitary-gonadal axis?

thalamus

Sperm from the male parent determines the gender of the child.

true

The secretions of the bulbo-urethral glands neutralize traces of acidic urine in the urethra and serve as a lubricant during sexual intercourse.

true

When a couple is having difficulty conceiving a child, it is necessary to investigate the sperm of the male.

true

If gametes were diploid like somatic cells, how many chromosomes would the zygote contain?

twice the diploid number, and with every succeeding generation, the choromosome number would continue to double and normal development could not occur.

Fertilization generally occurs in the

uterine tubes

The structures that receive the ovulated oocyte, providing a site for fertilization, are called the

uterine tubes

Erection of the penis results from

a parasympathetic reflex