CHAPTER 25: HUMAN REPRODUCTION

Select the incorrect statement.

The foetal ejection reflex in humans triggers the release of

Which one of the following statements about morula in humans is correct?

About which day in a normal human menstrual cycle does rapid secretion of LH (popularly called LH surge) normally occurs?

Changes in GnRH pulse frequency in females is controlled by circulating levels of

Capacitation occurs in

Match column I with column II and select the correct option using the codes given below.

Column I                                            Column II

A.Mons pubis                        (i)Embryo formation

B.Antrum                                           (ii)Sperm

C.Trophectoderm                 (iii)Female external genitalia

D.Nebenkern                            (iv)Graafian follicle

Study the following statements and answer the question. In a process called ‘A’, ‘B’ division starts as the zygote moves through the ‘C’ of the ‘D’ towards the ‘E’.

Identify A, B, C, D and E.

Study the following statements and answer the question.

“During ‘P’ phase of the menstrual cycle, if pregnancy doesn?t happen, the ‘Q’ withers and dies, usually around day 22 in a 28-day cycle. The drop in ‘R’ levels causes the lining of the uterus to fall away. This is known as ‘S’.

Identify P, Q, R and S.

Study the statement given below and answer the question. “Vigorous contraction of the ‘X’ at the end of the ‘Y’ causes expulsion of the foetus.”

Identify X and Y.

Seminal plasma in humans is rich in

The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testes is