The given figure illustrates monthly changes in the human ovary during the reproductive cycle.
Which of the following statements most accurately describes each structure?
The given figure illustrates monthly changes in the human ovary during the reproductive cycle.
Which of the following statements most accurately describes each structure?
The correct option is B The hormone produced by structure (B) causes thinning of the uterine cervical mucus to allow passage of sperms.
At birth, ovaries contain some 2 million follicles each with an ovum that has begun meiosis but is arrested in prophase(diplotene stage) of the first meiotic division. At this stage, the ova are called primary oocyte (labeled A).
The oocytes grow much larger and complete meiosis I, forming a large secondary oocyte(labeled C). The secondary oocyte proceeds as far as the metaphase stage of meiosis II and got arrested, it awaits the arrival of the spermatozoa for completion of second meiotic division. The Graafian follicle (labeled B) secretes estrogen which causes thinning of cervical mucus to allow easy passage of sperms through the cervix. Soon after ovulation blood vessels grow and ruptured Graafian follicle becomes filled with blood which is known as corpus luteum(labeled D)it secretes progesterone. Progesterone hormone maintains pregnancy and repair wall of the uterus to make it surface adhesive to help in implantations the correct answer is 'The hormone produced by structure (B) causes thinning of the uterine cervical mucus to allow passage of sperms.'
Thus the correct answer is 'The hormone produced by structure (B) causes thinning of the uterine cervical mucus to allow passage of sperms.'
At birth, ovaries contain some 2 million follicles each with an ovum that has begun meiosis but is arrested in prophase(diplotene stage) of the first meiotic division. At this stage, the ova are called primary oocyte (labeled A).
The oocytes grow much larger and complete meiosis I, forming a large secondary oocyte(labeled C). The secondary oocyte proceeds as far as the metaphase stage of meiosis II and got arrested, it awaits the arrival of the spermatozoa for completion of second meiotic division. The Graafian follicle (labeled B) secretes estrogen which causes thinning of cervical mucus to allow easy passage of sperms through the cervix. Soon after ovulation blood vessels grow and ruptured Graafian follicle becomes filled with blood which is known as corpus luteum(labeled D)it secretes progesterone. Progesterone hormone maintains pregnancy and repair wall of the uterus to make it surface adhesive to help in implantations the correct answer is 'The hormone produced by structure (B) causes thinning of the uterine cervical mucus to allow passage of sperms.'
Thus the correct answer is 'The hormone produced by structure (B) causes thinning of the uterine cervical mucus to allow passage of sperms.'
