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 throu
...
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
What are the two main solutes in extracellular fluid and in urine? Correct Answer-Na+ and ClADH function Correct Answer-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
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