BIOS 256 Final Exam (Latest 2022): Chamberlain College of Nursing

1. what are male gametes?: Sperm 2. What are female gametes?: Secondary oocytes 3. Embryonic period?: From fertilization through the eighth week of development 4. Fetal period?: Begins at week 9 and continues on until birth 5. Describe the first trimester?: 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. 6. Describe the second trimester?: 14 weeks to 27 weeks. Baby begins to develop human like features 7. Describe the third trimester?: 28 weeks to 40 weeks. Rapid fetal growth, fetus doubles in weight. 8. Cleavage of zygote: 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 9. What factors stimulate the thirst center in the hypothalamus?: Increased blood osmolarity(more solutes) Decreased blood volume Decreased blood pressure Dry mouth 10. What does a decreased blood pressure stimulate in the kidneys?: 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 11. What are the two main solutes in extracellular fluid and in urine?: Na+ and Cl12. ADH function: ADH responds to increased osmolarity, by inserting aquaporins in late DCT and collecting ducts, which increases the permeability to water and allows for more water to be reabsorbed, decreasing blood osmolarity, increasing blood volume, increasing blood pressure