
D3.1 Reproduction Final Revision

Quiz
•
Science
•
12th Grade
•
Medium
Jiezhu, Carolyn Khoo
Used 1+ times
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The first day of the menstrual cycle is when menstruation begins. What occurs around day 15 of the cycle?
Formation of a corpus luteum
The placenta starts to secrete progesterone
The end of menstruation
Blood progesterone concentration reaches its maximum
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which step occurs in both spermatogenesis and oogenesis?
First division of meiosis is stopped in prophase I until puberty begins.
Germinal epithelium cells divide by mitosis.
At the end of the first division in meiosis, the cytoplasm is divided equally between daughter cells.
Four haploid gametes are produced at the end of meiosis II.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of HCG in pregnancy?
It is secreted by the embryo to stimulate progesterone secretion by the ovary during early pregnancy.
Together with oxytocin, it is involved in the positive feedback required for uterine contractions during birth.
It sustains the secretion of progesterone by the placenta throughout pregnancy.
It stimulates the ovary to maintain secretion of estrogen in early pregnancy.
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
The diagram shows the position of the fetus at childbirth. Which hormone stimulates contractions of muscle cellsin the region labelled X?
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which hormone stimulates contractions of muscle cells in the region labelled X?
Estrogen
Oxytocin
Progesterone
Thyroxin
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In preparation for IVF, women are first treated with drugs, followed by artificial doses of hormones. What is the purpose of each step?
A
B
C
D
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following best describes the role of oestradiol in regulating pituitary hormone secretion during the menstrual cycle?
High levels of oestradiol inhibit LH secretion and stimulate FSH secretion.
Low levels of oestradiol stimulate LH and FSH secretion via positive feedback.
High levels of oestradiol before ovulation stimulate LH secretion via positive feedback.
High levels of oestradiol after ovulation stimulate LH and FSH secretion via negative feedback.
Answer explanation
Explanation: In the late follicular phase, rising oestradiol levels exert positive feedback on the anterior pituitary, leading to a surge in LH that triggers ovulation.
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