* not completed

. Which of the following statements regarding human reproduction are correct? Please select all that apply.

The male gametes are known as sperm correct incorrect

A mature sperm is a diploid cell correct incorrect

The female gametes are ova correct incorrect

Haploid cells are formed by the process of mitosis correct incorrect

A zygote is formed when an ovum and a sperm fuse correct incorrect

* not completed

. Which of the following statements regarding the testes are correct? Please select all that apply.

Leydig cells secrete testosterone correct incorrect

Testosterone inhibits the secretion of LH by negative feedback regulation. correct incorrect

Sertoli cells prevent free diffusion of water-soluble substances between the seminiferous tubules and the blood correct incorrect

Sertoli cells respond to testosterone by synthesising androgen binding protein correct incorrect

Sertoli cells line the seminiferous tubules and directly give rise to the developing sperm. correct incorrect

* not completed

. Which of the following statements regarding the menstrual cycle are correct? Please select all that apply.

The initiation of the preantral phase of follicular development is under the control of LH correct incorrect

The development of the antral follicle depends on the expression of receptors for FSH and LH correct incorrect

Ovulation occurs after about 14 days correct incorrect

Ovulation occurs in response to a sudden increase in plasma LH correct incorrect

The period before ovulation is known as the luteal phase correct incorrect

The luteal phase is associated with a large increase in plasma progesterone correct incorrect

The endometrium proliferates under the influence of progesterone. correct incorrect

* not completed

. Which of the following statements regarding hormonal control of the menstrual cycle are correct? Please select all that apply.

Oestrogens are synthesized mainly by the cells of the theca interna correct incorrect

In the absence of receptors for FSH and LH, preantral follicles undergo atresia correct incorrect

After ovulation, the ruptured follicle is converted into a corpus albicans which secretes progesterone correct incorrect

Progesterone promotes full development of the endometrium correct incorrect

If no egg is fertilized, progesterone levels fall and this is the trigger for menstruation. correct incorrect

* not completed

. Which of the following statements relating to the menstrual cycle are correct? Please select all that apply.

The period before ovulation is called the follicular phase correct incorrect

The luteal phase is associated with a large increase in progesterone secretion correct incorrect

Ovulation gives rise to a surge in the secretion of luteinising hormone (LH) correct incorrect

Ovulation marks the completion of one menstrual cycle correct incorrect

The cervical mucus is at its most viscous around ovulation correct incorrect

Typically the luteal phase lasts for around 2 days in the absence of pregnancy. correct incorrect

* not completed

. Which of the following hormones are secreted by the corpus luteum? Please select all that apply.

Prolactin correct incorrect

Progesterone correct incorrect

Oestrogens correct incorrect

Human chorionic gonadotrophin correct incorrect

FSH correct incorrect

* not completed

. Which of the following statements regarding male gamete formation is true? Please select all that apply.

Spermatids are formed from spermatocytes following the completion of the second meiotic division. correct incorrect

The nucleus of each spermatid contains 23 autosomes correct incorrect

Spermatids develop into sperm by the process of spermiogenesis correct incorrect

During spermatogenesis the spermatids divide by mitosis but remain linked by cytoplasmic bridges. correct incorrect

* not completed

. Approximately how long does it take for a spermatocyte to complete its differentiation into a spermatozoon in the testis?

7 days correct incorrect

7 months correct incorrect

70 days correct incorrect

70 hours correct incorrect