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MDCAT
Biology
2011

Biology · Reproduction

Work through this past-paper style MCQ, then read the full explanation. Practice more biology questions on mMCQ with adaptive practice and topic analytics.

Question

Luteinizing hormone triggers:

Options
  • A

    Cessation of oogenesis

  • B

    Breakdown of oocytes

  • C

    Ovulation

  • D

    Development of zygote

Explanation

Luteinizing hormone (LH) is a hormone produced by the anterior pituitary gland. It plays a crucial role in the female reproductive system by triggering ovulation. Ovulation is the process in which a mature follicle in the ovary releases an egg (oocyte) into the fallopian tube, where it can potentially be fertilized by sperm. Hence, option C is correct.

LH is not involved in the cessation of oogenesis. Oogenesis refers to the process of egg cell (oocyte) formation in the ovaries, and LH primarily affects the later stages of the menstrual cycle, including ovulation. Hence, this option is incorrect.

The breakdown of oocytes is not triggered by LH. The breakdown of unfertilized eggs occurs through a process called apoptosis, and it is not directly controlled by LH. Hence, this option is incorrect.

Luteinizing hormone (LH) is a hormone produced by the anterior pituitary gland. It plays a crucial role in the female reproductive system by triggering ovulation. Ovulation is the process in which a mature follicle in the ovary releases an egg (oocyte) into the fallopian tube, where it can potentially be fertilized by sperm.

LH does not play a direct role in the development of the zygote. After fertilization occurs in the fallopian tube, the resulting zygote undergoes cell division and development, but this is not directly initiated by LH. Hence, this option is incorrect.

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Tagged under Biology · Reproduction · 2011