Human Reproduction Chapter-Wise Test 5

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which hormone is released from the anterior pituitary to trigger ovulation in females?

Follicle-stimulating hormone (FSH)
Luteinizing hormone (LH)
Prolactin
Oxytocin
2

A surge in luteinizing hormone (LH) from the anterior pituitary triggers ovulation during the menstrual cycle.

During which phase of the menstrual cycle is the endometrium most receptive to implantation?

Follicular phase
Ovulatory phase
Luteal phase
Menstrual phase
3

During the luteal phase, under the influence of progesterone, the endometrium becomes thick and receptive to the implantation of a fertilized egg.

Which hormone is used as a marker in clinical pregnancy tests due to its early secretion by the developing placenta?

Progesterone
Estrogen
Human chorionic gonadotropin (hCG)
Luteinizing hormone (LH)
3

hCG is secreted by the trophoblast soon after implantation and is the hormone detected by pregnancy tests.

Which assisted reproductive technique involves transferring a fertilized embryo directly into the uterine cavity?

Intracytoplasmic sperm injection (ICSI)
Gamete intrafallopian transfer (GIFT)
Zygote intrafallopian transfer (ZIFT)
Embryo transfer (ET) following in vitro fertilization (IVF)
4

Embryo transfer (ET) is the final step in IVF where the cultured embryo is placed into the uterine cavity for implantation.

What is the primary function of the hormone relaxin during pregnancy?

Stimulate uterine contractions
Relax pelvic ligaments and soften the cervix
Increase milk production
Maintain the corpus luteum
2

Relaxin helps prepare the female body for childbirth by relaxing pelvic ligaments and softening the cervix.

Which of the following best describes the process of embryogenesis immediately following fertilization?

Cleavage resulting in a morula
Formation of a blastocyst
Implantation in the endometrium
Gastrulation
1

Following fertilization, the zygote undergoes cleavage, forming a morula before further development into a blastocyst.

Which of the following best describes the type of placentation seen in humans?

Diffuse placentation
Cotyledonary placentation
Discoid placentation
Zonary placentation
3

Humans exhibit discoid placentation, where the placenta forms a disc-shaped structure on the uterine wall.

During spermatogenesis, which stage directly produces spermatids?

Spermatogonia
Primary spermatocytes
Secondary spermatocytes
Sertoli cells
3

Secondary spermatocytes undergo meiosis II to form spermatids, which later mature into spermatozoa.

What is the primary role of the acrosomal reaction during fertilization?

To provide energy for sperm motility
To initiate the capacitation process
To facilitate the penetration of the zona pellucida
To trigger the cortical reaction in the oocyte
3

The acrosomal reaction releases enzymes that digest the zona pellucida, enabling the sperm to penetrate and fuse with the oocyte.

Which contraceptive method primarily works by preventing sperm from reaching the ovum?

Barrier methods (e.g., condoms)
Oral contraceptive pills
Intrauterine device (IUD)
Surgical sterilization
1

Barrier methods, such as condoms, physically block sperm from entering the female reproductive tract and reaching the ovum.

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