1. Chapter 11: Test yourself questions 1IGCSE Biology © Cambridge University Press
Test yourself questions
1 What happens to blood vessels in the skin when the body temperature gets
too high?
2 How does sweating cool the body?
3 Which hormone is secreted when blood glucose concentration rises
too high?
4 Islets of Langerhans contain receptor cells that detect changes in blood
glucose concentration.
In which organ are they found?
5 In which organ is urea produced?
Chapter 11
Homeostasis and excretion
A Arterioles supplying surface capillaries constrict.
B Arterioles supplying surface capillaries dilate.
C Capillaries move deeper into the skin.
D Capillaries move near to the surface.
A Sweat contains waste products such as salts and urea.
B The cold sweat lying on the skin makes you feel cooler.
C The sweat traps a layer of cool air next to the skin.
D Water in the sweat absorbs heat from the skin as it evaporates.
A adrenaline
B glucagon
C glycogen
D insulin
A brain
B liver
C muscle
D pancreas
A kidney
B liver
C gall bladder
D rectum

2. 2 Chapter 11: Test yourself questions IGCSE Biology © Cambridge University Press
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6 What are the ureters?
7 What is the name for the production of urea from excess amino acids?
8 What is a nephron?
9 Which of these substances pass from the blood into a kidney tubule
during filtration?
10 Which substances should be present in the dialysis fluid used in
a kidney machine?
A tubes leading from the bladder to the outside of the body
B tubes leading from the blood system to the kidneys
C tubes leading from the kidneys to the bladder
D tubes leading from the kidneys to the blood system
A deamination
B digestion
C egestion
D urination
A a small blood vessel in the kidneys
B a sphincter muscle that keeps urine in the bladder
C a tube leading from the kidneys to the bladder
D a tubule in the kidneys where urine is made
A glucose and water
B haemoglobin and urea
C red blood cells and white blood cells
D salts and platelets
A glucose and urea
B urea and haemoglobin
C haemoglobin and water
D water and glucose