Try each question on your own first. Use the Show Answer button only after you have selected your option, then read the explanation and revise the related concept from your chapter notes.
1. Spermatogenesis, the process of sperm formation, occurs within the:
A. Seminiferous tubules of the testis
B. Epididymis
C. Vas deferens
D. Prostate gland
Answer: A. Seminiferous tubules of the testis
Explanation: The seminiferous tubules contain the germinal epithelium where spermatogonia undergo meiosis to eventually form sperm.
2. The hormone primarily responsible for maintaining the endometrium during pregnancy is:
A. Progesterone
B. Estrogen alone
C. FSH
D. LH
Answer: A. Progesterone
Explanation: Progesterone, mainly secreted by the corpus luteum and later the placenta, supports and maintains the uterine lining throughout pregnancy.
3. Fertilization in humans normally takes place in the:
A. Ampullary region of the fallopian tube
B. Uterus
C. Ovary
D. Vagina
Answer: A. Ampullary region of the fallopian tube
Explanation: The ampulla, the widest part of the fallopian tube, is the usual site where the sperm meets and fertilizes the ovum.
4. The structure formed in the ovary after ovulation, which secretes progesterone, is the:
A. Corpus luteum
B. Graafian follicle
C. Corpus albicans
D. Primary follicle
Answer: A. Corpus luteum
Explanation: After the release of the ovum, the ruptured follicle transforms into the corpus luteum, which secretes progesterone.
5. The menstrual cycle in human females is primarily regulated by:
A. Hypothalamic, pituitary and ovarian hormones acting together
B. Pituitary hormones alone
C. Ovarian hormones alone
D. Thyroid hormones
Answer: A. Hypothalamic, pituitary and ovarian hormones acting together
Explanation: The menstrual cycle results from a coordinated interplay between hormones released from the hypothalamus, pituitary gland, and ovaries.
6. Implantation of the developing blastocyst normally occurs in the:
A. Endometrium of the uterus
B. Fallopian tube
C. Ovary
D. Cervix
Answer: A. Endometrium of the uterus
Explanation: The blastocyst attaches to and embeds itself within the endometrial lining of the uterus during implantation.
7. The umbilical cord functions to connect the developing fetus to the:
A. Placenta
B. Uterine wall directly
C. Amniotic sac only
D. Ovary
Answer: A. Placenta
Explanation: The umbilical cord carries blood vessels that connect the fetus to the placenta, enabling nutrient and gas exchange.
8. The general process of formation of gametes in both males and females is termed:
A. Gametogenesis
B. Fertilization
C. Cleavage
D. Parturition
Answer: A. Gametogenesis
Explanation: Gametogenesis is the collective term describing the formation of sperm (spermatogenesis) and ova (oogenesis).
9. Human Chorionic Gonadotropin (hCG), detected in early pregnancy tests, is secreted by the:
A. Developing placenta/trophoblast
B. Ovary
C. Pituitary gland
D. Testis
Answer: A. Developing placenta/trophoblast
Explanation: hCG is produced by the trophoblastic cells of the developing embryo shortly after implantation and helps maintain the corpus luteum.
10. Parturition, or childbirth, is triggered by hormonal and physical signals originating from the fully developed:
A. Fetus and placenta
B. Ovary alone
C. Uterus wall alone
D. Pituitary gland alone
Answer: A. Fetus and placenta
Explanation: Signals from the mature fetus and placenta initiate the mild uterine contractions that eventually lead to the process of labour.
11. The zona pellucida is a protective, transparent layer surrounding the:
A. Ovum (egg)
B. Sperm
C. Blastocyst wall exclusively
D. Uterus
Answer: A. Ovum (egg)
Explanation: The zona pellucida is a glycoprotein layer that surrounds the secondary oocyte and plays an important role during fertilization.
12. Repeated mitotic divisions of the zygote following fertilization lead to the formation of the:
A. Blastocyst
B. Corpus luteum
C. Follicle
D. Placenta directly
Answer: A. Blastocyst
Explanation: Through the process of cleavage, the zygote divides repeatedly to form a morula and eventually a blastocyst before implantation.
