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

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

During cleavage divisions, successive blastomeres:

1. have a decreasing nuclear/cytoplasmic ratio

2. become smaller and smaller

3. grow larger and larger

4. undergo meiotic divisions.

Human nervous system is derived from embryonic:

1. ectoderm

2. endoderm

3. epiderm

4. mesoderm

Gonadotropin releasing hormone (GnRH) is released from:

1. anterior pituitary

2. hypothalamus

3. gonads

4. posterior pituitary

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

The first haploid cell in sperm lineage is:

1. primary spermatocyte

2. secondary spermatocyte

3. spermatogonium

4. spermatid

A maturing ovarian follicle consisting of an oocyte surrounded by two or more layers of tall, supporting granulosa cells but lacking an antrum is: