S2 body systems test

Question Answer
What name is given to cells of similar size and shape that are grouped together to do a common job? A tissue
What is the smallest unit of every living organism? A cell
What do tissues make up? An organ
What are organs performing related functions organized into? An organ system
What is the function of the respiratory system? Takes in oxygen and gets rid of carbon dioxide
(gas exchange).
What is the function of the cardiovascular system? Pumps blood around body for tissues to
receive oxygen for respiration.
What is the name of a tube by which food passes down after swallowing? gullet (oesophagus)
What is the name of the part of digestive system where water is absorbed into the body? large intestine
What is the gas given out on exhaling? Carbon dioxide
What chemical changes from colourless to cloudy in presence of carbon dioxide? lime water
What test measures the maximum air that can be forced out of the lungs in one breath? peak flow reading
What is the function of valves in the cardiovascular system? To ensure that blood flows in one direction only (prevents backflow).
What is the name of the smaller chambers of the heart? Atrium
What is the name of the larger chamber of the heart? Ventricle
What are the three types of blood vessels? Veins, arteries and capillaries.
What test measures the maximum volume of air we can breathe out after we have taken a deep breath in? vital capacity
What is the function of the digestive system? Breaks down food to give the body energy.
Which type of blood vessel has valves? A vein
Which type of blood vessel has a wall one cell thick? A capillary
What is normal reading for human blood pressure? 120/70 mmHG
What gas do we inhale? Oxygen
What gas do plants take in? Plants take in carbon dioxide
What gas do plants give out? Plants give out oxygen
What name is given to the organ system involving the brain? nervous system
What part of the digestive system absorbs food into the blood? small intestine
What colour change would indicate that starch was present when iodine is added? brown to blue/black
What name is given to structures in the heart that keep blood flowing in one direction? valves
Where does fertilisation occur in the reproductive system? oviduct
Which cells found in the human body contain half the DNA of normal cells?: sperm and egg cells
What DNA base combines with base A? base T
Different forms (varsions) of the same gene are termed? alleles
What are the small units that carbohydrates are made up of called? simple sugars
What are the small units that proteins are made up of called? amino acids
Whch food group is made up of glycerol and fatty acids? fats
How would you test for the presence of carbon dioxide in breathed out air? Use a straw and some lime water. If carbon dioxide is present it should turn from colourless to cloudy
What is the relationship between the level of exercise and breathing rate? As the level of exercise increases so does the breathing rate
What is DNA profiling? DNA profiling is a way of identifying an individual using unique markers in their DNA base sequence
What are uses of DNA profiling? Forensic science and paternity testing
What are advantages of DNA profiling? It is painless, quick, inexpensive and confirms identity with certainty.
What are disadvantages of DNA profiling? Tests need to be repeated at least twice to avoid false results and also there are privacy concerns if DNA is stored.

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