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WorksheetsHuman Reproduction
Total questions: 53
Worksheet time: 27mins
What is the function of testosterone in spermatogenesis?
Inhibits the activity of Leydig cells
Inhibits the activity of Sertoli cells
Results in increased production of follicle stimulating hormone
Results in the growth and development of the spermatogonia to form spermatozoa
Where does fertilization take place?
I
II
III
IV
Identify the correct hormones W, X, Y and Z respectively.
progesterone, oestrogen, ADH, FSH
FSH, LH, oestrogen, progesterone
oestrogen, LH, adrenaline, progesterone
LH, oestrogen, FSH, progesterone
Human chorionic gonadotrophin in the urine of a woman indicates __________________________
ovulation has occurred
menstruation has begun
oestrogen levels have decreased
implantation of an embryo has occurred
Which hormone stimulates the development of the endometrium?
oestrogen
progesterone
luteinizing hormone
follicle-stimulating hormone
Select the correct sequence of events in development and implantation of a human embryo.
I, II, III, IV
I, III, IV, II
III, I, II, IV
III, II, I, IV
During the development of a child in the womb, the uterus wall consists of the muscle of the uterus wall and the
endometrium
chorionic villi
placenta
chorion
Which of the following BEST describes the events X and Y respectively?
X: Increasing levels of oestrogen promote thickening of endometrium; Y: Increasing levels of progesterone prepare the endometrium for implantation of a fertilized ovum
X: Increasing levels of oestrogen promote thickening of the endometrium; Y:A surge in FSH concentration prepares the endometrium for the implantation of the fertilized ovum.
X: Increasing levels of progesterone promote thickening of the endometrium; Y: A surge in LH concentration prepares the endometrium for the implantation of a fertilized ovum.
Increasing levels of FSH promote thickening of the endometrium; Y: Increasing levels of oestrogen prepare the endometrium for the implantation of a fertilized ovum.
Select the ploidy for stages I, II and IV respectively.
n, n, n
2n, n, n
2n, 2n, n
2n, 2n, 2n
The hormone that stimulates spermatogenesis in the seminiferous tubules is
inhibin
testosterone
luteinising hormone
follicle-stimulating hormone
Human spermatozoa have to spend several hours in the female genital tract before they can fertilize an oocyte. During this time, they are activated in a process called
capacitation
ejaculation
conception
copulation
The structure labelled H in the transverse section through the middle piece of a spermatozoon is MOST likely
nucleus
acrosome
microtubule
mitochondrion
Select two visible differences between maternal and foetal red blood cells respectively.
larger, enclosed by capillary,; smaller, not enclosed by capillary
smaller, not enclosed by capillary; larger, enclosed by capillary
smaller, nucleus seen; larger, no nucleus seen
larger, no nucleus seen; smaller, nucleus seen
What are X and Y respectively?
X - microvilli, Y - chorion
X - microvilli, Y - amnion
X - protective barrier, Y - chorion
X - protective barrier, Y- amnion
Which of the following hormones regulates the precise timing of ovulation?
oestrogen
progesterone
luteinizing hormone
follicle-stimulating hormone
In the structure of the secondary oocyte, what are P and Q?
P - lipid droplet, Q - corona radiata
P - lipid droplet, Q - zona pellucida
P - first polar body; Q - corona radiata
P - first polar body, Q - zona pellucida
Which of the following statements identifies a difference between the secondary oocyte and the ovum?
The secondary oocyte is diploid while the ovum is haploid
The secondary oocyte has two polar bodies while the ovum has one
The secondary oocyte is surrounded by the zona pellucida while the ovum is not
The secondary oocyte is at Metaphase II of meiosis while the ovum has completed the meiotic divisions
Select the correct order of events in the development of one follicle in the human ovary.
Primary follicle - Graafian follicle - Secondary oocyte
Primary follicle - Secondary oocyte - Corpus luteum
Primary oocyte - Corpus luteum - Secondary Oocyte
Primary follicle - Corpus luteum - Graafian follicle
Label P,Q,R and S respectively.
oviduct, cervix, myometrium, endometrium
ovary, cervix, endometrium, myometrium
ovary, uterus, endometrium, myometrium
oviduct, uterus, myometrium, endometrium
Select the correct sequence of events.
I-II-III-IV
II-III-I-IV
III-I-II-IV
III-I-IV-II
What is occurring at X?
A
B
C
D
In spermatogenesis in the seminiferous tubules, follicle stimulating hormone acts directly on the cells at
I
II
III
IV
In the testes, spermatozoa are stored in ________
I
II
III
IV
Which of the following hormones is directly responsible for the release of the ova from the ovary?
oestrogen
progesterone
luteinizing hormone
follicle-stimulating hormone
When will ovulation occur if there is a surge of LH and FSH on day 12 of the cycle?
within 24 hours of the surge
36 hours after the surge
48 hours after the surge
before day 12, LH and FSH have no impact on ovulation
The role of high-does progesterone only pills is to
directly cause lysis of sperm
promote a build-up of the endometrium
promote thinning of cervical mucus
completely inhibit follicular development and ovulation
Which part is responsible for the mechanical protection of the embryo?
I
II
III
IV
The structure labelled X is the
fluid filled sac which protects the embryo from mechanical shock
site where the female gametes undergo meiosis during maturation
site of exchange of materials between the mother and foetus
structure that stores yolk for the developing foetus
In the diagram showing a recently implanted blastocyst in the endometrium of the uterus, X is MOST likely the
yolk sac
trophoblast
blastocoel
embryonic disc
Which of the following is the outermost extra-embryonic membrane and contributes to the formation of placenta?
allantois
amnion
chorion
yolk sac
Which of the following sperm structures is NOT accurately matched with its function?
A
B
C
D
The DNA of a woman contains a defective gene for gonadotrophin releasing hormone. Which hormone and site of production will be affected?
anti-diuretic hormone - hypothalamus
follicle stimulating hormone - pituitary
testosterone - testes
luteinizing hormone - ovary
One feature that is common to both sperm (male gamete) and egg (female gamete) is
a diameter of approximately 100 micrometers
the abundance of mitochondria in cytoplasm
a haploid nucleus
a food store
The following list represents stages in the process of fertilization.
I - II - IV -III
III - I - II - IV
IV - II - I - III
IV - III - II - I
Which of the following identifies the structure which provides nourishment for the sperm-producing cells in the testes?
seminiferous tubule
sertoli cell
interstitial cell
connective tissue
Which of the following events occurring during the ovarian cycle is a result of the negative feedback caused by an increase in oestrogen levels?
Decreased production at the end of the secretory phase
Increased secretion of luteinizing hormone during follicular phase
Increased secretion of gonadotrophin releasing hormone during follicular phase
Decreased secretion of follicle-stimulating hormone after the release of the secondary oocyte
A
B
C
D
A
B
C
D
Which of the following cells are the nutritive cells of the seminiferous tubules?
Leydig cells
Sertoli cells
Spermatogonia
Cowper's cells
In human males, the paired testes are external to the body cavity because
this allows for easier transport of sperms to the urethra
they are too large to be accommodated inside the body
they contain the prostate gland which secretes seminal fluid
they contain the sperm which need a cooler temperature to remain viable.
A
B
C
D
Which of the following is an important function of the mammalian placenta?
Secretes hormones that are important during pregnancy
Stores the metabolic waste of the developing foetus
Helps to regulate and maintain a constant foetal body temperature
Transports drugs taken by the mother during pregnancy
Which of the following BEST explains why women should increase their intake of folate during pregnancy?
Humans cannot synthesize folate
The foetus is at risk of developing spina bifida if it does not get sufficient folate
The foetus is at risk of having a deformed skeleton if it does not get sufficient folate
The foetus will withdraw folate from the mother's body, thus putting her at risk of developing deformities.
Which of the following pairs of structures contributes directly to the development of the placenta?
Amnion and allantois
Chorion and allantois
Chorion and endometrium
Amnion and endometrium
What type of cell division is occurring at E,F and G respectively?
Mitosis - Mitosis - Meiosis I
Mitosis - Meiosis I - Meiosis II
Meiosis I - Mitosis - Meiosis II
Meiosis I - Meiosis II - MItosis
The structure of a section of placenta is shown. Which labelled structure contains many mitochondria?
1
2
3
4
Which of the following is NOT a function of the amniotic fluid?
Protects the foetus from physical shock
Allows free movement which helps bone development
Maintains a constant temperature around the foetus
Supplies oxygen to the foetus
Which of the following measurements is closest to the diameter of a mature human ovum?
10 nanometers
10 micrometers
10 millimeters
10 centimeters
How does the secondary oocyte differ from the ovum?
The nucleus is haploid in the secondary oocyte and diploid in the ovum.
The nucleus is diploid in the secondary oocyte and haploid in the ovum.
There is one more polar body in the secondary oocyte.
There is one more polar body in the ovum.
A birth control method that is used after sexual intercourse is typically referred to as a
spermicide
diaphragm
combination pill
morning-after pill
During spermatogenesis in a human, the first cells to divide meiotically are
spermatids
spermatogonia
primary spermatocytes
secondary spermatocytes
Oral birth control pills work MOST directly by
interfering with the penetration of the ovum by spermatozoa
suppressing follicle maturation and preventing ovulation
preventing implantation of the fertilized ovum in the endometrium
thickening of the cervical mucus thus preventing the spermatozoa form meeting the ovum
Which of the labelled structures produce fluids which aid in the transport of sperms?
1 and 3
1 and 4
2 and 5
1, 3 and 5
