Read the following passage and answer the next five questions: The reproductive cycle of female primates is called menstrual cycle. Menstrual cycle starts only after attaining sexual maturation (puberty). Generally, during ovulation only one ovum is released per menstrual cycle. The cyclical changes in the ovary and the uterus during menstrual cycle are induced by changes in the levels of pituitary and ovarian hormones. After coitus, sperms are transported to the junction of the isthmus and ampulla, where the sperm fertilises the ovum leading to formation of a diploid zygote.
Which of the following does not take place before ovulation in human females?
The corpus luteum secretes large amounts of progesterone.
Before ovulation:
1. LH (Luteinizing Hormone) and FSH (Follicle Stimulating Hormone) levels increase to stimulate follicular development (Option 1).
2. LH surge leads to the rupture of the Graafian follicle, releasing the ovum (Option 4).
3. The corpus luteum forms after ovulation and secretes large amounts of progesterone. Hence, Option 2 does not occur before ovulation.
Similar Questions
Which of the following does not constitute an accessory duct of the female reproductive system?
The female external genitalia include:
(A) Mons pubis
(B) Hymen
(C) Mammary ducts
(D) Clitoris
(E) Cervix
Choose the correct answer from the options given below:
Select the organ of the female reproductive system where the sperm is not transported at the time of coitus:
Match List-I with List-II:
List-I (Phase of menstrual cycle) List-II (Days of menstrual cycle) (A) Proliferative phase (I) 14th day (B) Menstrual phase (II) 15th–28th/29th days (C) Secretory phase (III) 1st–5th days (D) Ovulatory phase (IV) 5th–13th days Choose the correct answer from the options given below:
In humans, mammary gland is divided into __________ lobes.
Sex in human embryo is determined by:
Arrange the following stages of oogenesis in order of their occurrence:
(A) Ovum
(B) Oogonia
(C) Primary oocyte
(D) Secondary oocyte
Choose the correct answer from the options given below:
Important Questions from Human Reproduction
Arrange the following events chronologically as they occur during embryonic development:
- (A) Appearance of heart sounds
- (B) Development of limbs and digits
- (C) Formation of three primary germ layers
- (D) Separation of eyelids
Choose the correct answer from the options given below:
Which of the following hormone is generally not produced by the placenta?
In plants, continued self-pollination results in
Arrange the stages of oogenesis in order of their occurrence:
A. Formation of ovum & second polar body
B. Meiosis II begins but is held at Metaphase II
C. Meiosis I started but is held at Prophase I
D. Formation of primary oocyte from oogonia
E. Completion of Meiosis-I and formation of secondary oocyte and first polar body
Choose the correct answer from the options given below:
Signals of parturition originate from which of the following?
Human Placental Lactogen
Parturition hormone
Fully developed foetus
Placenta
