Identify the source of testosterone in males:
1. seminiferous tubules
2. epididymis
3. Sertoli cells
4. Leydig cells

To inhibit ovulation, the corpus luteum secretes:
1. inhibin
2. activin
3. estrogen
4. progesterone

The rudimentary alimentary cavity of an embryo at the gastrula stage is called:
1. vegetal pole
2. primitive streak
3. archenteron
4. blastocoel

Notochord develops from embryonic:
1. ectoderm
2. mesoderm
3. endoderm
4. archenteron

In humans, the majority of the placenta is formed by:
1. allantois
2. amnion
3. chorion
4. yolk sac

Human lungs develop from embryonic:
1. ectoderm
2. endoderm
3. epiderm
4. mesoderm

Human nervous system is derived from embryonic:

1. ectoderm

2. endoderm

3. epiderm

4. mesoderm

Inhibin in males or females decrease the secretion of:

1. FSH

2. LH

3. GnRH

4. Sex steroids

Identify the correct statement regarding the onset of puberty amongst the following:

1. LH is the first hormone to demonstrate an increased secretion

2. GnRH secretion decreases

3. spermatogenesis in males in stopped

4. secretion of sex steroids decreases

Which of the following cannot be exclusively because of testosterone?

1. growth of the larynx

2. development of pubic hair

3. growth of the testes

4. growth of the penis