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WorksheetsHuman Defences
Total questions: 22
Worksheet time: 13mins
Which of the following is not apart of your body’s first line of defense?
Skin
Mucus
Stomach Acid
Antibodies
The diagram below shows a cell in the human body engulfing a bacterial cell.
The cell labeled X is most likely a
red blood cell
white blood cell
liver cell
nerve cell
Which pathogen is only one cell big?
virus
bacteria
fungus
parasite/protist
Some examples of external defenses are...
Skin
Mucus
Inflammation
Saliva
Sweat
The purpose of introducing weakened microbes into the body of an organism is to stimulate the
production of living microbes that will protect the organism from future attacks
production of antigens that will prevent infections from occurring
immune system to react and prepare the organism to fight future invasions by these microbes
replication of genes that direct the synthesis of hormones that regulate the number of microbes
Edward Jenner cured ......
Cowpox
Smallpox
What is the function of antibodies within the immune system?
Antibodies kill off any antigen that enters the body.
Antibodies are only made when you are given a vaccination for specific antigens.
Antibodies bind to specific antigens to flag for destruction.
Antibodies are part of an external defense mechanism.
What does a vaccine contain?
Antigens from the disease-causing pathogen
Antibodies from the disease- causing pathogen
Lymphocytes producing antibodies against the pathogen
White blood cells to inactivate the disease-causing pathogen
What is herd immunity
When everyone is vaccinated.
A form of immunity that occurs when the vaccination of a significant portion of a population provides a measure of protection for individuals who have not developed immunity.
When all of a group of farm animals have been immunised.
When a disease spreads throughout a population.
