BIOS 256 Final Exam
Comprehensive Exam Questions & 100%
Verified Answers | Complete Final Exam
Review | Grade A+
, what are male gametes? Sperm
What are female gametes? Secondary oocytes
Embryonic period? From fertilization through the eighth week of development
Fetal period? Begins at week 9 and continues on until birth
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.
Describe the second trimester? 14 weeks to 27 weeks. Baby begins to develop human like features
Describe the third trimester? 28 weeks to 40 weeks. Rapid fetal growth, fetus doubles in weight.
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
What factors stimulate the thirst center in the Increased blood osmolarity(more solutes)
hypothalamus? Decreased blood volume
Decreased blood pressure
Dry mouth
What does a decreased blood pressure stimulate in the Stimulates the release of renin, which increases angiotensin II formation, leading to
kidneys? increased thirst, increased water intake, and increased blood volume, and
increased blood pressure
What are the two main solutes in extracellular fluid and in Na+ and Cl-
urine?
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
What are the two most important hormones in renal Aldosterone and ANP
reabsorption and urine regulation?
When is RAAS activated? Decreased blood pressure or Na+ deficiency in plasma, this causes an increase in
renin release which activates the RAAS system. This increases Na+ reabsorption
and water reabsorption in the late DCT and collecting ducts
Comprehensive Exam Questions & 100%
Verified Answers | Complete Final Exam
Review | Grade A+
, what are male gametes? Sperm
What are female gametes? Secondary oocytes
Embryonic period? From fertilization through the eighth week of development
Fetal period? Begins at week 9 and continues on until birth
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.
Describe the second trimester? 14 weeks to 27 weeks. Baby begins to develop human like features
Describe the third trimester? 28 weeks to 40 weeks. Rapid fetal growth, fetus doubles in weight.
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
What factors stimulate the thirst center in the Increased blood osmolarity(more solutes)
hypothalamus? Decreased blood volume
Decreased blood pressure
Dry mouth
What does a decreased blood pressure stimulate in the Stimulates the release of renin, which increases angiotensin II formation, leading to
kidneys? increased thirst, increased water intake, and increased blood volume, and
increased blood pressure
What are the two main solutes in extracellular fluid and in Na+ and Cl-
urine?
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
What are the two most important hormones in renal Aldosterone and ANP
reabsorption and urine regulation?
When is RAAS activated? Decreased blood pressure or Na+ deficiency in plasma, this causes an increase in
renin release which activates the RAAS system. This increases Na+ reabsorption
and water reabsorption in the late DCT and collecting ducts
