Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

28. Human Development

Introduction to Human Development

Anatomy & Physiology

28. Human Development

Introduction to Human Development

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Multiple Choice

Which of the following occurs if implantation is successful during early human development?

Fertilization occurs in the uterus

The embryo begins to secrete human chorionic gonadotropin (hCG)

Ovulation is triggered again

The endometrial lining is shed

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Verified step by step guidance

Understand the process of implantation: Implantation occurs when a fertilized egg (zygote) travels to the uterus and embeds itself into the endometrial lining, which is prepared to support early development.

Recall the role of human chorionic gonadotropin (hCG): hCG is a hormone secreted by the developing embryo after successful implantation. It signals the corpus luteum to continue producing progesterone, which maintains the endometrial lining and prevents its shedding.

Eliminate incorrect options: Fertilization does not occur in the uterus; it happens in the fallopian tube. Ovulation is not triggered again during pregnancy, as hormonal changes prevent further ovulation. The endometrial lining is not shed; instead, it is maintained to support the embryo.

Focus on the correct answer: The secretion of hCG is a key event following successful implantation, ensuring the pregnancy is sustained by maintaining the uterine environment.

Summarize the physiological importance: hCG secretion is critical for early pregnancy, as it prevents the menstrual cycle from resuming and supports the embryo's development by maintaining the uterine lining.