In humans, widening of the female hips is one example of physical changes that distinguish the sexes but are not essential for reproduction - Leaving Cert Biology - Question 13 - 2013
Question 13
In humans, widening of the female hips is one example of physical changes that distinguish the sexes but are not essential for reproduction.
To what term does the de... show full transcript
Worked Solution & Example Answer:In humans, widening of the female hips is one example of physical changes that distinguish the sexes but are not essential for reproduction - Leaving Cert Biology - Question 13 - 2013
Step 1
What term does the definition in italics refer?
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Answer
The term that describes physical changes distinguishing the sexes but not essential for reproduction is secondary sexual characteristics.
Step 2
What term is used for the time in a young person's life when such changes take place?
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Answer
The term used for this period is puberty.
Step 3
Name the hormone that maintains such changes throughout the life of a male.
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Answer
The hormone that maintains these changes in males is testosterone.
Step 4
Name the parts labelled A, B, C, D, E and F.
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A. Vagina (or womb)
B. Uterus (or womb)
C. Endometrium (or lining of uterus or lining of womb)
D. Fallopian tube (or oviduct)
E. Ovary
F. Cervix
Step 5
Where meiosis occurs.
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E (Ovary)
Step 6
Where zygote formation occurs.
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D (Fallopian tube)
Step 7
Where implantation occurs.
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C (Endometrium)
Step 8
Describe the role of oestrogen and progesterone in the control of the events of the menstrual cycle.
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Answer
Oestrogen is responsible for the repair of the endometrium, stimulates luteinizing hormone (LH), and inhibits follicle stimulating hormone (FSH). Progesterone maintains the endometrium and inhibits both LH and FSH.
Step 9
By which type of cell division does the zygote divide?
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The zygote divides by mitosis.
Step 10
What is the next developmental stage after the morula?
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The next developmental stage after the morula is the blastocyst.
Step 11
Give two roles of the placenta.
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The placenta acts as a barrier and secretes progesterone.
It facilitates material transfer between the mother and the fetus.
Step 12
Give one change experienced by the mother that indicates to her that the birth process is starting.
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A common change is contractions or the breaking of the waters.
Step 13
Give a short account of the birth process.
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The birth process involves contractions that help to dilate the cervix, followed by the baby being pushed through the birth canal. This is followed by the delivery of the placenta, also known as the afterbirth.
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