Question 1

Which tissues are correctly matched to their progenitor germ layer? (Check all that apply.)

Accepted Answer

A)   ectoderm-lining of the digestive tract
B)   ectoderm-epidermis
C)   endoderm-lining of the respiratory tract
D)   endoderm-muscles
E)   mesoderm-blood vesselsF)  mesoderm-gonadsG) B) and D)
H) C) and D)

Question 2

Which researcher would be most accurately described as engaging in therapeutic cloning?

Accepted Answer

A)   Judith is transferring tadpole nuclei into denucleated frog eggs in order to grow adult frogs
B)   Hans is trying to make an exact version of himself
C)   Ayame is working in a lab that is tryng to induce the formation of new skin cells
D)   Frederick is trying to produce a mammoth from nuclei extracted from ancient frozen mammoth tissueE) None of the above
F) A) and D)

Question 3

Which researcher would be most accurately described as engaging in reproductive cloning?

Accepted Answer

A)   Roger works in a lab that is trying to induce the formation of pancreatic cells.
B)   Conseula's research is focued in generating new bone tissue from iPS cells
C)   Peter is trying to clone particularly large bull
D)   Shelly wants to induce cells to form new neural tissueE) A) and B)
F) B) and C)

Question 4

What are attributes of oral contraceptives? (Check all that apply.)

Accepted Answer

A)   They contain a progesterone and sometimes an estrogen analogue.
B)   The progesterone is in the 21-day pills, and the estrogen is in the 7-day pills.
C)   They help protect against ovarian and endometrial cancer.
D)   They are appropriate for use by smokers over age 35.
E)   They have a low failure rate of only 1 to 5% a year.F)  They act by inhibiting LH and FSH secretion, inhibiting ovulation.G) None of the above
H) B) and E)

Question 5

Select the correct sequence of events of the human menstrual phase, beginning and ending with the menstrual cycle.

Accepted Answer

A)   menstrual phase  →\rightarrow→ proliferative phase (\rightarrow\)  ovulation  →\rightarrow→  secretory phase  →\rightarrow→  menstrual phase
B)   menstrual phase  →\rightarrow→  ovulation  →\rightarrow→ secretory phase  →\rightarrow→  proliferative phase  →\rightarrow→ menstrual phase
C)   menstrual phase  →\rightarrow→ secretory phase  →\rightarrow→ proliferative phase  →\rightarrow→ ovulation  →\rightarrow→ menstrual phase
D)   menstrual phase  →\rightarrow→ proliferative phase  →\rightarrow→  secretory phase  →\rightarrow→  ovulation  →\rightarrow→  menstrual phase E) B) and C)
F) All of the above

Question 6

In a normal mammalian birth, how does the body guarantee that birth proceeds to completion?

Accepted Answer

A)   Via positive feedback -- stretching of the uterus by the descending fetus induces release of oxytocin from the posterior pituitary causing even stronger uterine contractions.
B)   Via negative feedback -- stretching of the uterus by the descending fetus induces release of FSH and LH from the posterior pituitary causing even stronger uterine contractions.
C)   Via positive feedback -- stretching of the uterus by the descending fetus induces release of prolactin from the posterior pituitary causing even stronger uterine contractions.
D)   Via negative feedback -- stretching of the uterus by the descending fetus induces release of prostaglandins from the posterior pituitary causing weaker uterine contractions.E) B) and C)
F) All of the above

Question 7

Select the correct pair of statements about FSH and LH function.

Accepted Answer

A)   In males, FSH stimulates spermatogenesis and LH stimulates Leydig cells to secrete testosterone. In females, FSH stimulates growth of follicles and LH stimulates ovulation and development of the corpus luteum.
B)   In males, FSH stimulates spermatogenesis and LH stimulates Leydig cells to secrete testosterone. In females, FSH stimulates ovulation and development of the corpus luteum and LH stimulates growth of follicles.
C)   In males, FSH stimulates Leydig cells to secrete testosterone and LH stimulates spermatogenesis. In females, FSH stimulates growth of follicles and LH stimulates ovulation and development of the corpus luteum.
D)   In males, FSH stimulates Leydig cells to secrete testosterone and LH stimulates spermatogenesis. In females, FSH stimulates ovulation and development of the corpus luteum and LH stimulates growth of follicles.E) All of the above
F) None of the above A

Question 8

What is an iPS cell?

Accepted Answer

A)   A totipotent cell that is extracted from an embryo
B)   A cell that has been fertilized but the nuclei from the sperm and egg have not yet fused
C)   A cell that has been induced into a earlier stage thus making it pluripotent
D)   An egg with 2 nucleiE) All of the above
F) A) and B)

Question 9

Select the correct sequence of vertebrate development beginning with fertilization.

Accepted Answer

A)   fertilization  →\rightarrow→ cleavage  →\rightarrow→  gastrulation  →\rightarrow→  neurulation  →\rightarrow→  organogenesis  →\rightarrow→  neural crest formation
B)   fertilization  →\rightarrow→ gastrulation  →\rightarrow→  cleavage  →\rightarrow→  neurulation  →\rightarrow→  neural crest formation  →\rightarrow→  organogenesis
C)   fertilization  →\rightarrow→ neurulation  →\rightarrow→  gastrulation  →\rightarrow→  organogenesis  →\rightarrow→  neural crest formation  →\rightarrow→ cleavage
D)   fertilization  →\rightarrow→  gastrulation  →\rightarrow→ neurulation  →\rightarrow→ neural crest formation  →\rightarrow→  cleavage  →\rightarrow→ organogenesis
E)   fertilization  →\rightarrow→  cleavage  →\rightarrow→  gastrulation  →\rightarrow→  neurulation (\rightarrow\)  neural crest formation  →\rightarrow→  organogenesis F) B) and E)
G) B) and D)

Question 10

What would be the result for a patient if all his spermatogonia went through meiosis and proceeded to develop into spermatids?

Accepted Answer

A)   He would produce twice as many sperm and would be protected against infertility from other causes.
B)   He would produce twice as many sperm, which would crowd them during later development and lead to morphological defects.
C)   He would be entirely normal, since this is what usually happens.
D)   After one round of sperm production he would no longer be able to produce sperm and would be infertile.E) B) and D)
F) A) and B)

Question 11

Which developmental events are accurately placed in the following timeline? (Check all that apply.)

Accepted Answer

A)   after 6 days -- implantation
B)   after 1 week -- gastrulation
C)   after 2 weeks -- neurulation
D)   after 3 months -- organogenesis
E)   266 days -- birthF) None of the above
G) A) and E) A, B, C, E

Question 12

A cell that was capable of forming any type found in the organisms body but was not capable for forming the amniotic membrane would be __________.

Accepted Answer

A)   totipotent
B)   pluripotent
C)   multipotent
D)   unipotentE) All of the above
F) B) and C)

Question 13

In your fertility clinic, you look at the lab results of a young man. He has a prostate gland the size of a golf ball, a fructose-rich semen, and 10 million sperm per ml. His sperm consist of little more than DNA, mitochondria, and a flagellum, with almost no cytoplasm. Also, he has follicle-stimulating hormone (FSH)  and luteinizing hormone (LH)  in his bloodstream. Which of these is the likely cause of his fertility problems?

Accepted Answer

A)   enlarged prostate gland
B)   fructose in the semen
C)   sperm count
D)   sperm morphology
E)   FSH and LHF) A) and D)
G) D) and E)

Question 14

An extremely rare occurrence in humans is a multiple pregnancy with the embryos at different stages due to fertilization weeks apart. What mechanism normally prevents this from happening?

Accepted Answer

A)   The embryo's secretion of FSH and LH maintains the corpus luteum, keeping estradiol and progesterone high until the placenta takes over secretion of these hormones.
B)   The embryo's secretion of GnRH maintains the corpus luteum, keeping FSH and LH high until the placenta takes over secretion of these hormones.
C)   The embryo's secretion of hCG maintains the corpus luteum, keeping estradiol and progesterone high until the placenta takes over secretion of these hormones.
D)   The follicle's secretion of polar bodies maintains the fimbriae, keeping estradiol and progesterone high until the fallopian tube takes over secretion of these hormones.E) A) and B)
F) B) and D)

Question 15

What is the very first hormone your body produced?

Accepted Answer

A)   hCG
B)   FSH
C)   testosterone or estrogen
D)   GnRHE) All of the above
F) B) and C)

Question 16

Which of the following describe the placenta? (Check all that apply.)

Accepted Answer

A)   The bloods of the mother and the embryo come in close contact without mixing.
B)   The placenta neutralizes toxins like alcohol and drugs before they reach the fetus.
C)   Oxygen diffuses from the mother to the embryo.
D)   Carbon dioxide diffuses from the embryo to the mother.
E)   The placenta provides nourishment and hormones to the embryo.F)  The antibodies made in the embryo protect the mother from infections.G) C) and D)
H) D) and F)

Question 17

Which of the following are derived from mesoderm?

Accepted Answer

A)   blood
B)   epidermis of skin
C)   heart
D)   kidney
E)   lining of the digestive tractF)  lining of the respiratory tractG)  musclesH)  nervous systemI)  skeletonJ)  somitesK) A) and E)
L) A) and H) A, C, D, G, I, J

Exam 31: Reproduction and Development

Which tissues are correctly matched to their progenitor germ layer? (Check all that apply.)

Correct Answer
verified

Which researcher would be most accurately described as engaging in therapeutic cloning?

Correct Answer
verified

Which researcher would be most accurately described as engaging in reproductive cloning?

Correct Answer
verified

What are attributes of oral contraceptives? (Check all that apply.)

Correct Answer
verified

Select the correct sequence of events of the human menstrual phase, beginning and ending with the menstrual cycle.

Correct Answer
verified

In a normal mammalian birth, how does the body guarantee that birth proceeds to completion?

Correct Answer
verified

Select the correct pair of statements about FSH and LH function.

Correct Answer
verified
A

What is an iPS cell?

Correct Answer
verified

Select the correct sequence of vertebrate development beginning with fertilization.

Correct Answer
verified

What would be the result for a patient if all his spermatogonia went through meiosis and proceeded to develop into spermatids?

Correct Answer
verified

Which developmental events are accurately placed in the following timeline? (Check all that apply.)

Correct Answer
verified
A, B, C, E

A cell that was capable of forming any type found in the organisms body but was not capable for forming the amniotic membrane would be __________.

Correct Answer
verified

Correct Answer
verified

An extremely rare occurrence in humans is a multiple pregnancy with the embryos at different stages due to fertilization weeks apart. What mechanism normally prevents this from happening?

Correct Answer
verified

What is the very first hormone your body produced?

Correct Answer
verified

Which of the following describe the placenta? (Check all that apply.)

Correct Answer
verified

Which of the following are derived from mesoderm?

Correct Answer
verified
A, C, D, G, I, J

Exam 31: Reproduction and Development

Which tissues are correctly matched to their progenitor germ layer? (Check all that apply.)

Correct AnswerverifiedShow Answer

Which researcher would be most accurately described as engaging in therapeutic cloning?

Correct AnswerverifiedShow Answer

Which researcher would be most accurately described as engaging in reproductive cloning?

Correct AnswerverifiedShow Answer

What are attributes of oral contraceptives? (Check all that apply.)

Correct AnswerverifiedShow Answer

Select the correct sequence of events of the human menstrual phase, beginning and ending with the menstrual cycle.

Correct AnswerverifiedShow Answer

In a normal mammalian birth, how does the body guarantee that birth proceeds to completion?

Correct AnswerverifiedShow Answer

Select the correct pair of statements about FSH and LH function.

Correct AnswerverifiedA

What is an iPS cell?

Correct AnswerverifiedShow Answer

Select the correct sequence of vertebrate development beginning with fertilization.

Correct AnswerverifiedShow Answer

What would be the result for a patient if all his spermatogonia went through meiosis and proceeded to develop into spermatids?

Correct AnswerverifiedShow Answer

Which developmental events are accurately placed in the following timeline? (Check all that apply.)

Correct AnswerverifiedA, B, C, E

A cell that was capable of forming any type found in the organisms body but was not capable for forming the amniotic membrane would be __________.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

An extremely rare occurrence in humans is a multiple pregnancy with the embryos at different stages due to fertilization weeks apart. What mechanism normally prevents this from happening?

Correct AnswerverifiedShow Answer

What is the very first hormone your body produced?

Correct AnswerverifiedShow Answer

Which of the following describe the placenta? (Check all that apply.)

Correct AnswerverifiedShow Answer

Which of the following are derived from mesoderm?

Correct AnswerverifiedA, C, D, G, I, J

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified
A, B, C, E

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A, C, D, G, I, J