Question

6) Which chamber of the peniss fills with very little blood during the erection process? Why doesn’t this section fill as much as the other chambers? (2 points)

7) Select all of the following that are functions of the accessory glands of the male reproductive system. (2 points)

A) Spermatocyte creation

B) Supplying nutrients for gamete motility

C) Moving fluids along the reproductive tract

D) Buffer production

E) Hormone secretion for fertility regulation

8) Which of the following could be issues caused by dysfunctional interstitial cells of the testes in an adult male? Select all that apply. (2 points)

A) Low sperm cell production

B) Increased levels of GnRH in the blood

C) No formation of the male reproductive structures

D) A lack of growth plate ossification

E) Lower energy levels in the body

9) Regular steroid injections of testosterone would cause which of the following to occur? (1 point)

A) Decreased sex drive

B) Decreased levels of GnRH

C) Increased levels of LH and FSH

D) All of the answers are correct.

E) None of the answers is correct.

10) Select all of the following that will result from a vasectomy procedure. (1 point)

A) Sterility

B) Lack of ejaculation

C) Increased muscle mass

D) A surge in testosterone production

E) Decreased erection capabilities

11) Which of the following statements concerning oogenesis is true? (1 point)

A) Oogenesis begins after birth

B) Ova develop from stem cells called oogenesis

C) An ovum completes its last mitosis after it is fertilized

D) About half the oogonia complete mitosis between birth and puberty

E) By the time of their birth, girls have already lost about 80 percent of their oocytes

12) Select all of the following that are true of the vagina. (1 point)

A) Loses its inner lining during menses

B) Has a cervix for connection to the uterus

C) Holds sperm before their movement to the uterus

D) Is the lower region of the birth canal

E) Assists in urine movement via the urethra

Answer 1

6-

Corpora spongiosum is the other chamber along with corpora cavernosum. Function of corpora spongiosum is to prevent urethra from blocking when the penīs is erected. During erection, the blood gets filled in corpora cavernosum but corpora spongiosum remain flexible to protect urethra from getting blocked.

7-.

B ,C and D are the functions of accessory glands.

Buffering action is maintained by the seminal fluid secreted by seminal vesicle. It maintains the pH of semen.

Nutrition to developing sperms is provided by seminal vesicle. Fructose and other nutritive are important for sperm maturation.

Maintenance of sperm motility is enhanced by prostatic fluid. Prostatic fluid provide optimum pH for the motility of sperms

Other options are incorrect because spermatocyte creation occur in testes, not in accessory glands .And also hormone which regulate fertility are also secreted from testes.

8th question-

A,B,D and E are correct.

The interstitial cells produce testosterone. The functions of testosterone are-

1. Maintains secondary sexuãl characters in male.

2. Production of sperms.

3. Maintain bone mass.

4. Increases muscle mass.

5. It is anabolic in nature and maintains metabolism. Deficiency of testosterone cause weakness.

If testosterone levels are low, then it will send signal to hypothalamus to produce more GnRH by feedback mechanism. Thus levels of GnRH will be high.

As it's given in question that dysfunction is present in adult male, so reproductive organs are already developed. So no effect will be seen here.

9th question-

Option B is correct. Levels of GnRH will decrease because of feedback mechanism. When testosterone is artificially given from outside, the levels of testosterone will be high in body. This will activate the feedback inhibition mechanism and will send signal to hypothalamus to stop production of GnRH. GnRH production is increased when level of testosterone in body is low.

FSH and LH level will also be low because GnRH controls the level of both these. So if GnRH is low, both these hormones will also be low.

And testosterone increases séx drive, not decreases