Which one of the following statements is incorrect about menstrual cycle?
The first menstruation begins at puberty and is called menarche
Lack of menstruation may also occur due to some environmental factors like stress, poor health
Corpus luteum secretes large amounts of progesterone which is essential for maintenance of endometrium
In absence of fertilisation, corpus luteum degenerates in luteal phase and new follicles start developing immediately
Fertilisation in human beings occurs in
Match the columns.
Column $I$ | Column $II$ |
$(a)$ Testis andovary | $(1)$ Part of reproductive organ that transport germ cells |
$(b)$ Clitoris |
$(2)$ Developing fleshy fold surrounding both side of urinegenital groove - urethra |
$(c)$ Oviduct | $(3)$ Gametes which produce germ cells |
$(d)$ Scrotum,labium | $(4)$ Organs associated majora with sexual respons |
Ejaculation is the $...A...$ response. Erection is a $...B...$ response. Here, $A$ and $B$ refers to
Massive amount of yolk present in the vegetal region of the egg, makes an egg
Given below is a diagrammatic sketch of a portion of human male reproductive system. Select the correct set of the names of the parts labelled $A, B, C, D.$