Biology > QUESTIONS & ANSWERS > BIOS 256 Final Exam Questions and Answers Already Passed (All)

BIOS 256 Final Exam Questions and Answers Already Passed

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BIOS 256 Final Exam Questions and Answers Already Passed what are male gametes? Correct Answer-Sperm What are female gametes? Correct Answer-Secondary oocytes Embryonic period? Correct Answer-From ... fertilization through the eighth week of development Fetal period? Correct Answer-Begins at week 9 and continues on until birth Describe the first trimester? Correct Answer-The first trimester is from conception to 13 weeks. This period is very critical to babies health due to the extensive oran-system development, and baby is most vulnerable to teratogens. Describe the second trimester? Correct Answer-14 weeks to 27 weeks. Baby begins to develop human like features Describe the third trimester? Correct Answer-28 weeks to 40 weeks. Rapid fetal growth, fetus doubles in weight.Cleavage of zygote Correct Answer-Mitotic division after fertilization Day 1: two-cell stage Day 2: four-cell stage Day 3: eight-cell stage Day 4: morula Day 5: blastocyst Day 6: Implantation in uterine wall FIGURE 29.5 What factors stimulate the thirst center in the hypothalamus? Correct Answer-Increased blood osmolarity(more solutes) Decreased blood volume Decreased blood pressure Dry mouth What does a decreased blood pressure stimulate in the kidneys? Correct Answer-Stimulates the release of renin, which increases angiotensin II formation, leading to increased thirst, increased water intake, and increased blood volume, and increased blood pressure [Show More]

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