BIOS256 FINAL EXAM QUESTIONS
WITH DETAILED VERIFIED ANSWERS
(100% CORRECT ANSWERS)
1-4 weeks - correct answer- primary germ layers and
notochord develop, neurulation occurs, blood vessel formation
begins, heart forms, chorionic villi develop, placental formation
begins, embryo folds, body systems begin to form, eyes and
ears, primitive gut, pharyngeal arches, and limb buds develop
13-16 weeks - correct answer- head is smaller than rest
of body, eyes to final positions, ears to final positions, lower
limbs lengthen, more human like, rapid development of body
systems
17-20 weeks - correct answer- head more proportionate,
eyebrows and head hair visible, growth slows, vernix caseosa
and lanugo cover fetus, brown at forms, fetal movements felt by
mother
21-25 weeks - correct answer- head is more
proportionate, weight gain is substantial, skin is pink and
wrinkles, 24 weeks and older usually survive premature birth
,26-29 weeks - correct answer- eyes open, toenails visible,
body fat smooths out wrinkles, testes begin to descend, red
bone marrow is major site of blood cell production, many
preemies born can survive due to development of lungs and
nervous system
30-34 weeks - correct answer- skin is pink and smooth,
fetus assumes upside-down position, body fat is 8% of mass
35-38 weeks - correct answer- abdominal circumference
greater than head, growth slows, body fat is 16% of mass, testes
in scrotum
5-8 weeks - correct answer- limbs become distinct and
digits appear, heart becomes 4 chambered, eyes are far apart
and eyelids are fused, nose develops, face is more human like,
bone formation begins, blood cells start to form in liver, external
genitals begin to differentiate, tail disappears, major blood
vessels form, many internal organs continue to develop
9-12 weeks - correct answer- head constitutes half fetal
body length, fetal length doubles, brain enlarges, eyes fully
developed, closed, and separated, nose bridge develops,
external ears develop, bone formation continues, upper limbs
reach almost final length, heart beat detected, gender is
, distinguishable, urine secreted by fetus added to amniotic fluid,
red bone marrow, thymus, and spleen participate in blood cell
formation, fetus begins to move
ABP - correct answer- Androgen binding protein
secreted by sustenacular cells
binds to testosterone, keeping concentration high
absorptive cells - correct answer- digest and absorb
nutrients
Alleles - correct answer- alternative versions of a gene
Anabolic reactions - correct answer- endergonic
formation of peptide bonds between amino acids
building of fatty acids into phospholipids
linkage of glucose monomers to form glycogen
ascending limb of nephron loop - correct answer- after
hairpin turn, terminates at DCT
WITH DETAILED VERIFIED ANSWERS
(100% CORRECT ANSWERS)
1-4 weeks - correct answer- primary germ layers and
notochord develop, neurulation occurs, blood vessel formation
begins, heart forms, chorionic villi develop, placental formation
begins, embryo folds, body systems begin to form, eyes and
ears, primitive gut, pharyngeal arches, and limb buds develop
13-16 weeks - correct answer- head is smaller than rest
of body, eyes to final positions, ears to final positions, lower
limbs lengthen, more human like, rapid development of body
systems
17-20 weeks - correct answer- head more proportionate,
eyebrows and head hair visible, growth slows, vernix caseosa
and lanugo cover fetus, brown at forms, fetal movements felt by
mother
21-25 weeks - correct answer- head is more
proportionate, weight gain is substantial, skin is pink and
wrinkles, 24 weeks and older usually survive premature birth
,26-29 weeks - correct answer- eyes open, toenails visible,
body fat smooths out wrinkles, testes begin to descend, red
bone marrow is major site of blood cell production, many
preemies born can survive due to development of lungs and
nervous system
30-34 weeks - correct answer- skin is pink and smooth,
fetus assumes upside-down position, body fat is 8% of mass
35-38 weeks - correct answer- abdominal circumference
greater than head, growth slows, body fat is 16% of mass, testes
in scrotum
5-8 weeks - correct answer- limbs become distinct and
digits appear, heart becomes 4 chambered, eyes are far apart
and eyelids are fused, nose develops, face is more human like,
bone formation begins, blood cells start to form in liver, external
genitals begin to differentiate, tail disappears, major blood
vessels form, many internal organs continue to develop
9-12 weeks - correct answer- head constitutes half fetal
body length, fetal length doubles, brain enlarges, eyes fully
developed, closed, and separated, nose bridge develops,
external ears develop, bone formation continues, upper limbs
reach almost final length, heart beat detected, gender is
, distinguishable, urine secreted by fetus added to amniotic fluid,
red bone marrow, thymus, and spleen participate in blood cell
formation, fetus begins to move
ABP - correct answer- Androgen binding protein
secreted by sustenacular cells
binds to testosterone, keeping concentration high
absorptive cells - correct answer- digest and absorb
nutrients
Alleles - correct answer- alternative versions of a gene
Anabolic reactions - correct answer- endergonic
formation of peptide bonds between amino acids
building of fatty acids into phospholipids
linkage of glucose monomers to form glycogen
ascending limb of nephron loop - correct answer- after
hairpin turn, terminates at DCT
