B1F GLOSSARY

ALL THE WORDS YOU NEED TO KNOW FOR B1F SINGLE SCIENCE, OCR BOARD - HIGHER TIER, BIOLOGY

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B1f
Contraception ­ prevention of pregnancy
Dehydration ­ when an organism becomes short of water
Diabetes ­ disease in which a person does not produce enough
insulin to control the level of sugar in the blood
Fertility ­ the ability to fertilise when male and female sex cells
fuse together
Heat stroke­ a condition caused when the body overheats
Homeostasis ­ maintaining a constant internal environment within
the body
Hypothermia ­ a lowering of the body's temperature
Insulin ­ hormone produced by the pancreas that lowers the level
of glucose in the blood
Oestrogen ­ a hormone produced by the ovary that causes the
lining of the uterus to thicken
Ovulation ­ release of an ovum from the ovary
Progesterone ­ a hormone produced by the ovary after the ovum
has been released ; it maintains the wall of the
uterus during pregnancy
Sex hormone ­ hormones that control the secondary sexual
characteristics
Vasoconstriction ­ a decrease in the diameter of blood capillaries
Vasodilatation - an increase in the diameter of blood capillaries

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