Daily quizzes

These questions are to help you quiz yourself. To see my answers, select the area underneath the question using your mouse. (click and drag)  Don't print this out, or the answers will be visible as well!

Identify the corresponding organ for the opposite sex:

Fill in the blanks for the path of sperm through the male reproductive tract:

Seminiferous tubules→epididymis→vas deferens→ejaculatory duct→prostatic urethra→membranous urethra→ spongy urethra→urethral orifice.

Which cells in the testes produce testosterone? * the interstitial or Leydig cells under the influence of LH (ICSH) from the anterior pituitary gland. *
Which cells form the blood-testis barrier and absorb the excess cytoplasm released during spermiogenesis? *The sustentacular cells or Sertoli cells of the seminiferous tubules. Remember these have tight junctions between them.*
In order for sperm to develop properly, the testes must be kept: *3 degrees Celsius cooler than body temperature. *
Are the components of semen produced by the accessory glands in the male acid or alkaline? Why? *These fluids are alkaline to neutralize the acids in the male and female reproductive tracts. *
Where do the sperm get the energy to keep swimming? *The prostate gland and seminal vesicles contain sugars that provide the sperm with energy. These sugars are converted into energy by the many mitochondria in the midpiece of the sperm.*
What does the acrosome of the sperm do? *The acrosome on the head of the sperm contains enzymes that enable the sperm to eat through the corona radiata (granulosa cells) that surround the secondary oocyte. Once one sperm gets through, the zona pelucida changes so that no other sperm can enter the oocyte.*
How many sperm are produced from a primary spermatocyte? How many eggs result from the development of a primary oocyte?* Four sperm, but only one ovum due to the unequal distribution of the cytoplasm during the formation of the ovum. *
What is a polar body? * A polar body is  a package of DNA that is formed during meiosis in the female. It is simply a way of getting rid of the extra DNA that is not needed so that a haploid ovum can be formed. *
Think of the female cycle as a "dialog" between the anterior pituitary gland and the ovaries. The hypothalamus produces gonadotropin releasing factors that cause the anterior pituitary gland to produce: FSH or follicle stimulating hormone. This affects the follicles in the ovaries, causing them to develop and produce the hormone estrogen. This hormone causes the anterior pituitary to produce and store Luteinizing Hormone (LH) until the estrogen levels get high enough. Then a surge of Luteinizing Hormone is released from the anterior pituitary gland, causing the follicle in the ovary to rupture, releasing the ovum in the process called ovulation. The ruptured follicle then becomes the corpus luteum which produces large amounts of the hormone progesterone. If fertilization does not occur, the levels of estrogen and progesterone fall, and the menstrual cycle begins again.
For conception to occur, intercourse must take place between two days before ovulation and one day after ovulation.*
I will try to do a quiz for chapter 23 this coming week.