The following is the illustration of the sequence of ovarian events (a-i) in a human female. Name the ovarian hormone and the pituitary hormone that have caused the above-mentioned events.

The above mentioned event represents the process that take place in the ovary during menstrual cycle. The pituitary hormones are FSH and LH. FSH stimulates oogenesis and development of Graafian follicles in ovary. LH stimulates ovulation in female as a result of this corpus luteum is formed. Estrogen is an ovarian hormone that is secreted by Graafian follicles. Estrogen includes estradiol, estrone and estriol.

The following is the illustration of the sequence of ovarian events (a-i) in a human female. Explain the changes that occurs in the uterus simultaneously in anticipation.

The above-mentioned series of events represents the follicular phase and luteal phase of the menstrual cycle in a female's body. During the follicular phase, the rising levels of estrogen cause the endometrium to proliferate and thicken through the process of regeneration. It also causes an increase in the vascularity and glandular nature of the uterus. If the fertilization takes place, the uterine fluid secretes the nutritious fluid. In the absence of fertilization, the endometrium gets disintegrated.

E M B I B E

Biology Zoology Standard 12>Chapter 2 - Human Reproduction>Evaluation>Q 29

MEDIUM

12th Tamil Nadu Board

IMPORTANT

Earn 100

Describe the structure of the human ovum with a neat labelled diagram.

Important Questions on Human Reproduction

EASY

12th Tamil Nadu Board

IMPORTANT

Biology Zoology Standard 12>Chapter 2 - Human Reproduction>Evaluation>Q 1

The mature sperms are stored in the

MEDIUM

12th Tamil Nadu Board

IMPORTANT

Biology Zoology Standard 12>Chapter 2 - Human Reproduction>Evaluation>Q 30

Give a schematic representation of spermatogenesis and oogenesis in humans.

MEDIUM

12th Tamil Nadu Board

IMPORTANT

Biology Zoology Standard 12>Chapter 2 - Human Reproduction>Evaluation>Q 31

Explain the various phases of the menstrual cycle.

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12th Tamil Nadu Board

IMPORTANT

Biology Zoology Standard 12>Chapter 2 - Human Reproduction>Evaluation>Q 32

Explain the role of oxytocin and relaxin in parturition and lactation.

MEDIUM

12th Tamil Nadu Board

IMPORTANT

Biology Zoology Standard 12>Chapter 2 - Human Reproduction>Evaluation>Q 34

The following is the illustration of the sequence of ovarian events (a-i) in a human female. Identify the figure that illustrates ovulation and mention the stage of oogenesis it represents.

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