Human Reproduction and Development - Applications
Q. At what stage does the zygote implant into the uterine wall?
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A.
Cleavage stage
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B.
Blastocyst stage
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C.
Gastrulation stage
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D.
Neurulation stage
Solution
The zygote implants into the uterine wall during the blastocyst stage, approximately 5-6 days after fertilization.
Correct Answer: B — Blastocyst stage
Q. During which stage of human development does the heart begin to beat?
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A.
Gastrulation
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B.
Neurulation
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C.
Embryonic stage
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D.
Fetal stage
Solution
The heart begins to beat during the embryonic stage, typically around the 6th week of gestation.
Correct Answer: C — Embryonic stage
Q. What is the role of amniotic fluid during pregnancy?
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A.
To provide nutrients to the fetus
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B.
To cushion the fetus and allow for movement
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C.
To facilitate gas exchange
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D.
To regulate maternal blood pressure
Solution
Amniotic fluid cushions the fetus, allowing for movement and protecting it from external shocks.
Correct Answer: B — To cushion the fetus and allow for movement
Q. What is the term for the process by which sperm and egg unite?
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A.
Fertilization
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B.
Implantation
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C.
Ovulation
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D.
Gestation
Solution
Fertilization is the process where sperm and egg unite to form a zygote.
Correct Answer: A — Fertilization
Q. Which hormone is primarily responsible for the regulation of the menstrual cycle?
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A.
Estrogen
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B.
Progesterone
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C.
Luteinizing hormone
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D.
Follicle-stimulating hormone
Solution
Estrogen plays a key role in regulating the menstrual cycle, particularly in the follicular phase.
Correct Answer: A — Estrogen
Q. Which phase of the menstrual cycle is characterized by the thickening of the uterine lining?
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A.
Follicular phase
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B.
Ovulation phase
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C.
Luteal phase
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D.
Menstrual phase
Solution
The luteal phase is characterized by the thickening of the uterine lining in preparation for potential implantation.
Correct Answer: C — Luteal phase
Q. Which structure is responsible for the production of sperm in males?
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A.
Seminal vesicles
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B.
Prostate gland
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C.
Testes
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D.
Epididymis
Solution
The testes are the male reproductive organs responsible for the production of sperm.
Correct Answer: C — Testes
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