Questions and Answers

How does the placenta facilitate the exchange of materials between the mother and fetus, and what are some examples of substances exchanged?

How does HCG (human chorionic gonadotropin) stimulate the ovary to secrete progesterone during early pregnancy?

Why is the implantation of the blastocyst in the endometrium crucial for the continuation of pregnancy?

What mechanisms are involved in preventing polyspermy during fertilization, and why is this important for successful embryo development?

What are the key differences between internal and external fertilization in animals, and how do these methods ensure successful reproduction?

In what ways do spermatogenesis and oogenesis differ in terms of the number of gametes produced and the distribution of cytoplasm?

How do spermatogenesis and oogenesis both involve mitosis, cell growth, two divisions of meiosis, and differentiation?

What phenomena were investigated to understand how desert animals prevent water loss in their wastes, and what were the findings?

Annotate a diagram of the nephron to show the structure and function of each part involved in filtration and reabsorption.

Draw and label the structure of the human kidney, highlighting the role of each part in osmoregulation.