Download 1.4 How do we grow? - Kettering Science Academy

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1.4 How do we grow?
1 Name a type of cell that does not divide. (Level 3)
2 State the difference between growth in humans and growth in plants.
(Level 3)
3 If one cell divides six times, how many cells will be produced? (Level 4)
4 At what point in the cell’s cycle of division do cells grow in size? (Level 5)
5 Explain why it is important for scientists to find out more about cell
division. (Level 6)
6 Suggest why injuries with broken bones get better, but injuries to our
spinal cord and brain do not. (Level 7)
7 Suggest why it would be useful to know why cancer cells can keep on
dividing, when normal healthy cells can only divide about 100 times.
(Level 7)
1.5 All shapes and sizes
1 Why do cells have different shapes and structures? (Level 3)
2 Name three cells that are adapted to do different jobs. (Level 3)
3 Suggest one use for stem cells. (Level 4)
4 Explain why stem cells are different from normal body cells. (Level 5)
5 Sickle cells are red blood cells that stick together and become stiff after
they deliver oxygen. Explain why a sickle cell is less efficient at carrying
oxygen around the body than a normal red blood cell. (Level 6)
6 How would you expect the root hair cells from a desert plant to differ from
those of a tropical rainforest plant? Explain your answer. (Level 7)
7 Explain the difference in meaning between the words specialised and
adapted when talking about cells. (Level 7)
1.6 Best Science Lesson Ever: Cooking up a cell
1 Which type of cell – plant or animal – will it be easier to make a model of?
Explain why. (Level 3)
2 Sue’s group wanted to show that the vacuoles in their pizza model store
water. What could they use instead of white cheese? (Level 4)
3 Craig’s group put some pasta tubes into their pizza base. Can you
suggest a reason why they did this? (Level 5)
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4 Why do science books usually show models as 2D rather than 3D?
(Level 6)
5 For each ingredient used in the plant cell pizza model, write down
whether or not you think it is suited to represent that part of the cell. Give
reasons for your answers. (Level 7)
1.7 Building blocks
1 What sort of cells make up muscle tissue? (Level 3)
2 Name one tissue in a human and one tissue in a plant. What are their
jobs? (Level 3)
3 Why is the heart described as an organ? (Level 4)
4 a Which type of cells are quite easy to grow in the lab?
b How can they be used? (Level 5)
5 Suggest a reason why it is important for scientists to develop new ways of
growing tissues in the lab. (Level 6)
6 It is possible to produce thousands of cauliflower plants from one original
plant using the tissue culture method. a What are the advantages of this?
b Can you think of a disadvantage? (Level 7)
7 Write a news report about a new science fiction novel in which a human is
given a brain transplant with a brain cultured from part of his father’s
brain. (Level 7)
1.10 We want more pandas
1 Name three parts of the female reproductive system. (Level 3)
2 Unscramble the letters to find the parts of the male reproductive system:
a snipe; b stites; c morctus; d sremp bute (Level 3)
3 What is the job of the penis in reproduction? (Level 4)
4 Why do you think males produce a lot of sperm? (Level 5)
5 Which cells will be the oldest: sperm cells from a 30-year-old man, or egg
cells from a 20-year-old woman? Explain your answer. (Level 6)
6 What sort of things could scientists check if Giant Pandas were not
breeding successfully? (Level 7)
7 Why would blocked oviducts prevent a woman becoming pregnant?
(Level 7)
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1.11 It takes two
1 Explain why a sperm cell has a long tail. (Level 3)
2 Explain why the penis becomes stiff before sexual intercourse. (Level 3)
3 What happens during IVF treatment? (Level 5)
4 Arrange the following parts of the female body in the order that the sperm
passes through: uterus, cervix, oviduct, vagina. (Level 5)
5 In what way is the sperm adapted to allow it to get to the egg? (Level 6)
6 Some people think that helping older women to have babies is wrong.
What are the possible problems for women over 50 having babies
through IVF? (Level 7)
7 Women over 50 who have IVF may use donated eggs. Explain why some
women may not want to have a baby from a donated egg. (Level 7)
1.12 A new life
1 What is the job of the amniotic fluid? (Level 3)
2 How long does a human pregnancy last? (Level 3)
3 How is a fetus attached to its mother’s uterus? Explain why it is attached.
(Level 4)
4 Describe the possible problems faced by parents who have a premature
baby. (Level 5)
5 Why is it not a good idea for pregnant women to smoke or take drugs?
(Level 6)
6 Some people think that premature babies as young as 23 weeks should
not be kept alive. Explain both sides of the argument. (Level 7)
7 What kind of decisions will a mother need to take before she decides
whether or not to have an amniocentesis? (Level 7)
1.13 Growing up
1 What is the name for the bodily changes that happen during
adolescence? (Level 3)
2 What controls the menstrual cycle? (Level 3)
3 There are several visible physical changes that happen during puberty.
What is a less obvious change that happens during puberty? (Level 4)
4 Why does the wall of the uterus thicken during the menstrual cycle?
(Level 5)
5 What might cause a girl’s periods to stop? (Level 6)
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6 Suggest why a woman will take a contraceptive pill every day even
though only one egg is released from the ovary every 28 days. Use ideas
about hormones in your answer. (Level 7)
7 In what part of the menstrual cycle is a girl most likely to get pregnant?
(Level 7)
1.14 Finding patterns in data
1 What do we call the time taken for a baby animal to develop inside its
mother’s uterus? (Level 3)
2 Why do human females release only one egg at a time? (Level 4)
3 Explain the difference between observations and variables. (Level 5)
4 Why do scientists feel that it is important to look for patterns in data?
(Level 6)
5 If data does not fit the pattern, is the data always wrong? Explain your
answer. (Level 7)
G o S cience! 1 © P earson E ducation Limited 2008
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