Human Reproduction · Question 59

The main function of mammalian corpus luteum is to produce

1. estrogen only
2. progesterone
3. human chorionic gonadotropin
4. relaxin only

Select the correct option describing gonadotropin activity in a normal pregnant female.

1. High level of FSH and LH stimulates the thickening of endometrium.
2. High level of FSH and LH facilitates implantation of the embryo.
3. High level of hCG stimulates the synthesis of estrogen and progesterone.
4. High level of hCG stimulates the thickening of endometrium.

What is the correct sequence of sperm formation?

1. Spermatogonia, spermatozoa, spermatocytes, spermatids
2. Spermatogonia, spermatocytes, spermatids, spermatozoa
3. Spermatids, spermatocytes, spermatogonia, spermatozoa
4. Spermatogonia, spermatocytes, spermatozoa, spermatids

Which of the following is not the function of placenta?

1. Facilitates supply of oxygen and nutrients to embryo
2. Secretes estrogen
3. Facilitates removal of carbon dioxide and waste material from embryo
4. Secretes oxytocin during parturition

Menstrual flow occurs due to lack of :

1. Progesterone
2. FSH
3. Oxytocin
4. Vasopressin

The foetal ejection reflex in humans triggers the release of

1. oxytocin from foetal pituitary
2. human chorionic gonadotropin (hCG) from placenta
3. oxytocin from maternal pituitary
4. human placental lactogen (hPL) from placenta

The figure shows a section of human ovary. Select the option which gives the correct identification of either A or B with function/ characteristic. [Figure]

1. A- Tertiary follicle - Forms Graafian follicle
2. B- Corpus luteum - Secretes progesterone
3. A- Primary oocyte - It is in the prophase I of the meiotic division
4. B- Corpus luteum - Secretes estrogen

The secretory phase in the human menstrual cycle is also called :

1. Follicular phase lasting for about 6 days
2. Luteal phase and lasts for about 13 days
3. Follicular phase and lasts for about 13 days
4. Luteal phase and lasts for about 6 days

Identify the human developmental stage shown below as well as the related right place of its occurrence in a normal pregnant woman, and select the right option for the two, together. [Figure]

1. Developmental stage Late morula, Site of occurrence Middle part of Fallopian tube
2. Developmental stage Blastula, Site of occurrence End part of Fallopian tube
3. Developmental stage 8-celled morula, Site of occurrence Starting point of Fallopian tube
4. Developmental stage Blastocyst, Site of occurrence Uterine wall

Which one of the following statements is false in respect of viability of mammalian sperm?

1. Viability of sperm is determined by its motility
2. Sperms must be concentrated in a thick suspension
3. Sperm is viable for only up to 24 hours
4. Survival of sperm depends on the pH of the medium and is more active in alkaline medium