BIOS 256 Final Exam Study Guide Exam
(2026) UPDATE 2026\2027 ACTUAL
COMPLETE EXAM Questions With
Correct Detailed & Verified ANSWERS
(100% Accurate Solutions) ||ALREADY
GRADED A+||Exam Guarantee Pass!!
Dartos muscle function - ANSWERS-"wrinkling" of scrotum to reduce heat loss in cold
weather
Cremaster muscle function - ANSWERS-elevates the testes closer to the body in
response to cold temperatures
Where is sperm produced? - ANSWERS-seminiferous tubules
LH function in males - ANSWERS-"Leydig hormone"
Stimulates testosterone production from Leydig cells of testes
Where does sperm mature? - ANSWERS-Epididymis
Three parts of male urethra - ANSWERS-Prostatic, membranous, and spongy
Describe the second trimester? - ANSWERS-14 weeks to 27 weeks. Baby begins to
develop human like features
, Describe the third trimester? - ANSWERS-28 weeks to 40 weeks. Rapid fetal growth,
fetus doubles in weight.
Cleavage of zygote - ANSWERS-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
what are male gametes? - ANSWERS-Sperm
What are female gametes? - ANSWERS-Secondary oocytes
Describe the first trimester? - ANSWERS-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.
What factors stimulate the thirst center in the hypothalamus? - ANSWERS-Increased
blood osmolarity(more solutes)
Decreased blood volume
Decreased blood pressure
Dry mouth
Embryonic period? - ANSWERS-From fertilization through the eighth week of
development
Fetal period? - ANSWERS-Begins at week 9 and continues on until birth
(2026) UPDATE 2026\2027 ACTUAL
COMPLETE EXAM Questions With
Correct Detailed & Verified ANSWERS
(100% Accurate Solutions) ||ALREADY
GRADED A+||Exam Guarantee Pass!!
Dartos muscle function - ANSWERS-"wrinkling" of scrotum to reduce heat loss in cold
weather
Cremaster muscle function - ANSWERS-elevates the testes closer to the body in
response to cold temperatures
Where is sperm produced? - ANSWERS-seminiferous tubules
LH function in males - ANSWERS-"Leydig hormone"
Stimulates testosterone production from Leydig cells of testes
Where does sperm mature? - ANSWERS-Epididymis
Three parts of male urethra - ANSWERS-Prostatic, membranous, and spongy
Describe the second trimester? - ANSWERS-14 weeks to 27 weeks. Baby begins to
develop human like features
, Describe the third trimester? - ANSWERS-28 weeks to 40 weeks. Rapid fetal growth,
fetus doubles in weight.
Cleavage of zygote - ANSWERS-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
what are male gametes? - ANSWERS-Sperm
What are female gametes? - ANSWERS-Secondary oocytes
Describe the first trimester? - ANSWERS-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.
What factors stimulate the thirst center in the hypothalamus? - ANSWERS-Increased
blood osmolarity(more solutes)
Decreased blood volume
Decreased blood pressure
Dry mouth
Embryonic period? - ANSWERS-From fertilization through the eighth week of
development
Fetal period? - ANSWERS-Begins at week 9 and continues on until birth
