BIOS 256 Final Exam Multiple Questions & Answers

Document Content and Description Below

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 develop... ment 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 What are the two main solutes in extracellular fluid and in urine? - Correct Answer -Na+ and Cl- [Show More]

Last updated: 3 weeks ago

Preview 1 out of 10 pages