Question

3.What happens to the embryo after week 8?

A. Tissue and organ differentiation from the endoderm and mesoderm finalize
at the end of the second trimester.
B. All organ formation has completed, so the fetus begins to grow in size
through mitosis.
C. All other organs such as kidneys, bladder, liver, lungs, and spleen begin
to form.
D. Umbilical cord and placenta begins to form.

5. Which of the following rows correctly completes the following sentence?
________ occurs during fetal development when an embryo is not exposed to
adequate levels of ________ during neurulation.
A.    A B
Spina bifida    Vitamin B12
B. A    B
Malformation of the    Thalidomide
limbs

C.    A    B

Microcephaly    Zika virus

D.    A B
   Anencephaly Folic acid

11. Between 1959 and 1961, thalidomide was prescribed to expectant mothers
in Canada for morning sickness. Once it was determined that thalidomide
was linked to miscarriages and birth defects, it was pulled from Canadian
pharmacies in 1962. It is estimated that over 20 000 individuals worldwide
were affected by thalidomide. There are approximately 100 thalidomide survivors
in Canada who have been approved to receive compensation from the
federal government.
Which of the following over the counter and prescription medications have not
been linked with birth defects or problems with pregnancy? (Some research may
be required.)
A. Isotretinoin for acne
B. Advil (ibuprofen)
C. Valproic acid for epilepsy
D. Amoxicillin as an antibiotic

18. Which of the following hormones are involved in uterine contractions

during parturition?
A. Oxytocin and prostaglandins
B. Prolactin and oxytocin
C. Estrogen and progesterone
D. Prostaglandins and prolactin

20. Labour is controlled by the nervous and endocrine systems through a positive

feedback system.
In which example have we encountered another positive feedback system in
Biology 30?
A. Progesterone during menstruation
B. Reflex loop in the PNS
C. Estrogen during ovulation
D. FSH levels during sperm production

21. There are two hormones involved in lactation. The hormone involved in the
production of the milk and the hormone involved in releasing milk,
respectively, are
A. prolactin and oxytocin
B. oxytocin and prolactin
C. prolactin and progesterone
D. colostrum and oxytocin

24. Identify the manipulated and responding variable(s) in the study by placing the letter of
the type of variable in the blank.
Variable:
Patients with normal blood glucose
Level of oxytocin
Patients with Type 2 diabetes

A. Manipulated
B. Responding

25. Which of the following statements does not correctly describe the similarities

and differences between male and female reproductive systems?
A. Eggs and sperm can survive for 3 to 5 days in the Fallopian tubes.
B. Eggs and sperm contain exactly half of the genetic material of a normal
somatic cell. Many zygotes with an abnormal number of genetic material
often do not successfully implant.
C. Millions of mature sperm are produced on a daily basis, whereas single
mature ovum is released every 28 days.
D. Meiosis is completed after fertilization in eggs, whereas a mature sperm has
completed meiosis prior to fertilization.

27. Which description below explains how the hormones released in birth control

pills causes natural ovulation to cease?
A. Birth control pills release progesterone. Progesterone feeds back to the
pituitary gland, thereby inhibiting FSH and LH and in effect, stopping the
ovarian and menstrual cycle.
B. Birth control pills release estrogen. Estrogen controls the secondary sex
characteristics of the female body.
C. Birth control pills release progesterone. Progesterone causes an increase in
FSH, thereby increasing the production of follicles.
D. Birth control pills release estrogen. Estrogen feeds back to the posterior
pituitary, causing an increase of LH and thereby ceasing the ovarian cycle.

28. Which of the following statements correctly identifies the differences between

spermicidal jelly and a condom?
A. Condoms form a barrier to protect against sperm movement as well as
viruses. Spermicidal jelly breaks down cell membranes of bacteria.
B. Condoms are semipermeable membranes whereas spermicidal jelly does not
form any barrier.
C. Condoms prevent the physical transfer of most sexual secretions.
Spermicidal jelly kills sperm, but allows fluid transfer.
D. Condoms contain an antibacterial coating while spermicidal jelly only kills
sperm cells.

Answer 1

3). Other critical organs (kidneys, bladder, liver, lungs, spleen) begin to form. By 8th week, all body organs are formed but require more development. The placenta begins forming at the end of week 2 (but umbilical cord forms at week 8.

5). Correct option is D i,e. anencephaly , Folic acid

Anencephaly is a kind of birth defect in which the major parts of the brain and skull of the fetus are not formed completely in the womb. A deficiency of folic acid (vitamin B9) before and during pregnancy increase the chance of anencephaly