WorksheetsF4 Chapter 15
Total questions: 28
Worksheet time: 14mins
How do the levels of oxytocin and progesterone change immediately prior to birth?
A
B
C
D
Where is human chorionic gonadotrophin (HCG) produced?
Ovary
Anterior pituitary
Embryo
Posterior pituitary
What happens to the polar bodies formed during oogenesis?
They cause the acrosome reaction.
They cause the cortical reaction.
They pull chromosomes to the ends of the cell when the zygote divides.
They are not used and break down.
During fertilization in humans, where do the acrosome and the cortical reactions occur most often?
A
B
C
D
What happens to the zygote immediately after fertilization?
It remains in the uterus until placenta develops.
It implants in the wall of the uterus.
It divides by meiosis to form an embryo.
It divides by mitosis to form a blastocyst.
Which of the following are functions of the placenta?
I. Gas exchange
II. Stimulation of uterine contractions
III. Secretion of progesterone
IV. Secretion of estrogens
I only
III and IV only
I, III and IV only
I, II, III and IV
Why is human chorionic gonadotropin (HCG) important in early pregnancy?
It is required for equal cell divisions in the growing embryo.
It stimulates the ovary to continue production of estrogen and progesterone.
It increases the rate of cell division in the embryo.
It promotes growth of the inner cell mass within the embryo.
Which of the following occur(s) at birth in the mother’s body?
I. Increase in oxytocin
II. Increase in uterine contractions
III. Increase in levels of progesterone
I only
I and II only
II and III only
I, II and III
Which hormone maintains the corpus luteum in the ovary of a woman at implantation?
FSH
LH
HCG
Progesterone
What part of spermatogenesis in humans takes place while spermatids are associated with Sertoli cells?
Cell differentiation
First division of meiosis
Second division of meiosis
Testosterone production
How does the amniotic fluid help the fetus during pregnancy?
I. Supplies food to allow the fetus to grow rapidly
II. Supports the fetus so that no part of it is under excess pressure
III. Protects the fetus by acting as a shock absorber
I and II only
I and III only
II and III only
I, II and III
Which of these statements about the human placenta is incorrect?
The placenta is the site of nutrient and gas exchange between the mother and fetus
The placenta produces hormones, such as estrogen.
The placenta begins to develop after implantation of the blastocyst.
The mother’s blood and the baby’s blood mix in the placenta.
The umbilical artery carries blood from the fetus to the placenta and the umbilical vein carries blood from the placenta to the fetus.
How does the composition of the blood in the umbilical artery and the umbilical vein differ?
Blood in the umbilical artery contains less glucose than blood in the umbilical vein.
Blood in the umbilical artery contains less carbon dioxide than blood in the umbilical vein.
Blood in the umbilical vein contains less oxygen than blood in the umbilical artery.
Blood in the umbilical vein contains more urea than blood in the umbilical artery.
What is a difference between human sperm and human egg cells?
Sperm have more chromosomes.
Sperm have a larger surface area to volume ratio.
Eggs have an acrosome.
The division of the cytoplasm in sperm production is uneven.
Which hormone causes an increase in the number of oxytocin receptors on cells lining the uterus?
HCG
Progesterone
Estrogen
LH
The diagram shows a section through the seminiferous tubules. What is the cell labelled X?
Spermatid that will differentiate into sperm
Primary spermatocyte that will undergo meiosis to form secondary spermatocytes
Sertoli cell that provides nutrients
Stem cell that will divide by mitosis to form spermatogonia
If the ovaries of a pregnant woman have to be removed during the first five months of pregnancy, a miscarriage results and the pregnancy fails. If the ovaries are removed in the last four months of pregnancy, the miscarriage does not occur. What is the reason for this?
After the fifth month, the ovaries can regenerate rapidly.
The placenta produces sufficient hormones to sustain the pregnancy.
The pituitary gland takes over the function of sustaining the pregnancy.
Before removal the ovaries produce sufficient hormones to sustain the pregnancy.
The diagram shows the female reproductive system. Which structures do K and L identify?
K: endometrium L: uterine wall
K: placenta L: endometrium
K: amnion L: placenta
K: fetus L: uterine wall
Which hormone is inhibited during pregnancy in order to prevent contractions of the uterus?
Oxytocin
Progesterone
Estrogen
FSH
Where does the acrosome reaction occur?
A
B
C
D
The image shows a section of a seminiferous tubule. What is shown by the letter X?
Meiosis I in a primary spermatocyte
A spermatogonium undergoing mitosis
Meiosis II in a secondary spermatocyte
A spermatid undergoing meiosis
Through what process does a spermatid become a functioning spermatozoan?
Mitosis
Differentiation
Fertilization
Meiosis
The image shows the male reproduction system. Where is prostate cancer likely to start developing?
In X only
In Y and Z only
In Z only
In X, Y and Z
What is the function of the epididymis in the male reproduction system?
To stimulate sperm production by secreting testosterone
To store the sperm in the final stages of maturation
To provide fluids to nourish the sperm
To transport the sperm from the testes to the urethra
From where is human chorionic gonadotropin (HCG) secreted in early pregnancy?
Embryo
Corpus luteum
Ovary
Pituitary gland
What does the sperm duct do?
It stores sperm.
It allows the degeneration of the sperm cells themselves.
It allows the transit of sperm from the testicles to the outside of the body.
It produces testosterone
Where does the cervix lie?
On the outside of the female genitals.
Next to the ovaries.
On the fallopian tube.
The narrow passage forming the lower end of the uterus.
How is a zygote formed?
A sperm meets an egg inside the fallopian tube.
A sperm meets an egg inside the uterus of a female.
An egg meets a sperm inside the vagina of a female.
A sperm meets an egg inside the cervix of a female.
